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Maximum Frequency Deviation Calculation in Small Isolated Power Systems
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2009 Spain Publisher:Institute of Electrical and Electronics Engineers (IEEE)
Authors: Egido Cortés, Ignacio; Fernández Bernal, Fidel; Centeno López, Pablo; Rouco Rodríguez, Luis;
doi: 10.1109/tpwrs.2009.2030399
handle: 11531/5176
doi: 10.1109/tpwrs.2009.2030399
handle: 11531/5176
Artículos en revistas Large frequency deviations due to a number of disturbances are frequent in small isolated power systems. The maximum frequency deviation in the system is limited to prevent other generator tripping. It is important to have an accurate model to calculate it, both for system planning and operation. A new simplified model to calculate the maximum frequency deviation when either a generator or load-related disturbance occurs in these systems is presented. This model takes into account the response of governor- prime mover even when different technologies are present in the power system. Model parameters can be easily obtained from either more complex models or from test records. Simulation results for an actual power system aimed at checking the model accuracy are presented. High accuracy is obtained while computation time is reduced due to the simplicity of the model. info:eu-repo/semantics/publishedVersion
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Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2009 . Peer-reviewed
License: IEEE Copyright
Data sources: Crossref
IEEE Transactions on Power Systems
Journal
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142
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Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2009 . Peer-reviewed
License: IEEE Copyright
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IEEE Transactions on Power Systems
Journal
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Maximum Frequency Deviation Calculation in Small Isolated Power Systems
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2009 Spain Publisher:Institute of Electrical and Electronics Engineers (IEEE)
Authors: Egido Cortés, Ignacio; Fernández Bernal, Fidel; Centeno López, Pablo; Rouco Rodríguez, Luis;
doi: 10.1109/tpwrs.2009.2030399
handle: 11531/5176
doi: 10.1109/tpwrs.2009.2030399
handle: 11531/5176
Artículos en revistas Large frequency deviations due to a number of disturbances are frequent in small isolated power systems. The maximum frequency deviation in the system is limited to prevent other generator tripping. It is important to have an accurate model to calculate it, both for system planning and operation. A new simplified model to calculate the maximum frequency deviation when either a generator or load-related disturbance occurs in these systems is presented. This model takes into account the response of governor- prime mover even when different technologies are present in the power system. Model parameters can be easily obtained from either more complex models or from test records. Simulation results for an actual power system aimed at checking the model accuracy are presented. High accuracy is obtained while computation time is reduced due to the simplicity of the model. info:eu-repo/semantics/publishedVersion
Recolector de Cienci...arrow_drop_down
Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2009 . Peer-reviewed
License: IEEE Copyright
Data sources: Crossref
IEEE Transactions on Power Systems
Journal
Data sources: Microsoft Academic Graph
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142
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Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2009 . Peer-reviewed
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IEEE Transactions on Power Systems
Journal
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Lyapunov Stability Based Wide Area Control Systems for Excitation Boosters in Synchronous Generators
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2019 Spain Publisher:Institute of Electrical and Electronics Engineers (IEEE)
Authors: Luis Diez-Maroto; Javier Renedo; Luis Rouco; Fidel Fernandez-Bernal;
doi: 10.1109/tpwrs.2018.2865970
handle: 11531/30439
doi: 10.1109/tpwrs.2018.2865970
handle: 11531/30439
Artículos en revistas Excitation Boosters (EB) are aimed to improve Fault Ride Through (FRT) capability of synchronous generators equipped with bus fed static excitation systems by means of adding a supplementary voltage or current source to the rectifier. However, this paper shows that EBs governed by local On-Off controls may result in adverse effects in case of remote faults from generators that may occur in multi-machine systems. To sort this problem out, a novel EB Wide Area Control System (WACS) that modulates the EB voltage using the generator speed deviation with respect to the speed of the Center Of Inertia (COI) is proposed. The speed of the COI is obtained using a Wide Area Measuring System (WAMS), whereas the control laws are deduced from the Lyapunov stability theory. Results show that transient stability of multi-machine systems can be enhanced using EB WACS. info:eu-repo/semantics/publishedVersion
Recolector de Cienci...arrow_drop_down
Recolector de Ciencia Abierta, RECOLECTA
Article . 2018
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2019 . Peer-reviewed
License: IEEE Copyright
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IEEE Transactions on Power Systems
Journal
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14
citations 14
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Recolector de Cienci...arrow_drop_down
Recolector de Ciencia Abierta, RECOLECTA
Article . 2018
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2019 . Peer-reviewed
License: IEEE Copyright
Data sources: Crossref
IEEE Transactions on Power Systems
Journal
Data sources: Microsoft Academic Graph
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Lyapunov Stability Based Wide Area Control Systems for Excitation Boosters in Synchronous Generators
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2019 Spain Publisher:Institute of Electrical and Electronics Engineers (IEEE)
Authors: Luis Diez-Maroto; Javier Renedo; Luis Rouco; Fidel Fernandez-Bernal;
doi: 10.1109/tpwrs.2018.2865970
handle: 11531/30439
doi: 10.1109/tpwrs.2018.2865970
handle: 11531/30439
Artículos en revistas Excitation Boosters (EB) are aimed to improve Fault Ride Through (FRT) capability of synchronous generators equipped with bus fed static excitation systems by means of adding a supplementary voltage or current source to the rectifier. However, this paper shows that EBs governed by local On-Off controls may result in adverse effects in case of remote faults from generators that may occur in multi-machine systems. To sort this problem out, a novel EB Wide Area Control System (WACS) that modulates the EB voltage using the generator speed deviation with respect to the speed of the Center Of Inertia (COI) is proposed. The speed of the COI is obtained using a Wide Area Measuring System (WAMS), whereas the control laws are deduced from the Lyapunov stability theory. Results show that transient stability of multi-machine systems can be enhanced using EB WACS. info:eu-repo/semantics/publishedVersion
Recolector de Cienci...arrow_drop_down
Recolector de Ciencia Abierta, RECOLECTA
Article . 2018
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2019 . Peer-reviewed
License: IEEE Copyright
Data sources: Crossref
IEEE Transactions on Power Systems
Journal
Data sources: Microsoft Academic Graph
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14
citations 14
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Recolector de Cienci...arrow_drop_down
Recolector de Ciencia Abierta, RECOLECTA
Article . 2018
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2019 . Peer-reviewed
License: IEEE Copyright
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IEEE Transactions on Power Systems
Journal
Data sources: Microsoft Academic Graph
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Evaluation of Automatic Generation Control (AGC) regulators by performance indices using data from real operation
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2007 Spain Publisher:Institution of Engineering and Technology (IET)
Authors: Egido Cortés, Ignacio; Fernández Bernal, Fidel; Rouco Rodríguez, Luis;
doi: 10.1049/iet-gtd:20060173
handle: 11531/5285
doi: 10.1049/iet-gtd:20060173
handle: 11531/5285
Artículos en revistas Indices to evaluate AGC performance under both simulation and real operation are presented. These indices are based on functional dependence and statistical analysis avoiding large and long periods of data collection necessary for comparison of different regulators in real operation. A method to perform the global evaluation of the regulator using the individual values obtained for the indices is also presented. Variables typically measured in power systems are used to compute the indices. Examples of calculated values of the indices using data from real operation of two regulators in the same area of the Spanish power system are presented. Response criterion imposed in the Spanish power system is used. info:eu-repo/semantics/publishedVersion
IET Generation, Tran...arrow_drop_down
IET Generation, Transmission & Distribution
Article . 2007 . Peer-reviewed
Data sources: Crossref
IET Generation, Transmission & Distribution
Journal
Data sources: Microsoft Academic Graph
Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
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Published in a Diamond OA journal
12
citations 12
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IET Generation, Tran...arrow_drop_down
IET Generation, Transmission & Distribution
Article . 2007 . Peer-reviewed
Data sources: Crossref
IET Generation, Transmission & Distribution
Journal
Data sources: Microsoft Academic Graph
Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
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Evaluation of Automatic Generation Control (AGC) regulators by performance indices using data from real operation
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2007 Spain Publisher:Institution of Engineering and Technology (IET)
Authors: Egido Cortés, Ignacio; Fernández Bernal, Fidel; Rouco Rodríguez, Luis;
doi: 10.1049/iet-gtd:20060173
handle: 11531/5285
doi: 10.1049/iet-gtd:20060173
handle: 11531/5285
Artículos en revistas Indices to evaluate AGC performance under both simulation and real operation are presented. These indices are based on functional dependence and statistical analysis avoiding large and long periods of data collection necessary for comparison of different regulators in real operation. A method to perform the global evaluation of the regulator using the individual values obtained for the indices is also presented. Variables typically measured in power systems are used to compute the indices. Examples of calculated values of the indices using data from real operation of two regulators in the same area of the Spanish power system are presented. Response criterion imposed in the Spanish power system is used. info:eu-repo/semantics/publishedVersion
IET Generation, Tran...arrow_drop_down
IET Generation, Transmission & Distribution
Article . 2007 . Peer-reviewed
Data sources: Crossref
IET Generation, Transmission & Distribution
Journal
Data sources: Microsoft Academic Graph
Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
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Published in a Diamond OA journal
12
citations 12
popularity Top 10%
influence Top 10%
impulse Average
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IET Generation, Tran...arrow_drop_down
IET Generation, Transmission & Distribution
Article . 2007 . Peer-reviewed
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IET Generation, Transmission & Distribution
Journal
Data sources: Microsoft Academic Graph
Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
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Maximum wind power generation in a power system imposed by system inertia and primary reserve requirements
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2014 Spain Publisher:Wiley
Authors: Fernández Bernal, Fidel; Egido Cortés, Ignacio; Lobato Miguélez, Enrique;
doi: 10.1002/we.1773
handle: 11531/4827
doi: 10.1002/we.1773
handle: 11531/4827
AbstractAlthough the technology to simulate inertia or to provide primary control in wind power generators is mature, most of them are a source of power with neither inertia nor primary reserve provision mainly because it means wind spilling. Therefore, an increasing wind power penetration means a reduction in the inertia of the system and of the primary reserve due to the substitution of conventional generation. In this paper, the maximum wind power penetration focusing on system inertia and primary reserve value is assessed. The Spanish power system is used as an example for the calculation of these values. For this purpose, real Spanish scenario data are used. Results will show that high penetrations of wind power can be achieved without risking adequate values of primary reserve or inertia of the power system even if wind power does not contribute to these items. Copyright © 2014 John Wiley & Sons, Ltd.
Wind Energyarrow_drop_down
Wind Energy
Article . 2014 . Peer-reviewed
License: Wiley Online Library User Agreement
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Wind Energy
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Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
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23
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Wind Energyarrow_drop_down
Wind Energy
Article . 2014 . Peer-reviewed
License: Wiley Online Library User Agreement
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Wind Energy
Journal
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Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
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Maximum wind power generation in a power system imposed by system inertia and primary reserve requirements
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2014 Spain Publisher:Wiley
Authors: Fernández Bernal, Fidel; Egido Cortés, Ignacio; Lobato Miguélez, Enrique;
doi: 10.1002/we.1773
handle: 11531/4827
doi: 10.1002/we.1773
handle: 11531/4827
AbstractAlthough the technology to simulate inertia or to provide primary control in wind power generators is mature, most of them are a source of power with neither inertia nor primary reserve provision mainly because it means wind spilling. Therefore, an increasing wind power penetration means a reduction in the inertia of the system and of the primary reserve due to the substitution of conventional generation. In this paper, the maximum wind power penetration focusing on system inertia and primary reserve value is assessed. The Spanish power system is used as an example for the calculation of these values. For this purpose, real Spanish scenario data are used. Results will show that high penetrations of wind power can be achieved without risking adequate values of primary reserve or inertia of the power system even if wind power does not contribute to these items. Copyright © 2014 John Wiley & Sons, Ltd.
Wind Energyarrow_drop_down
Wind Energy
Article . 2014 . Peer-reviewed
License: Wiley Online Library User Agreement
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Wind Energy
Journal
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Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
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23
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Wind Energyarrow_drop_down
Wind Energy
Article . 2014 . Peer-reviewed
License: Wiley Online Library User Agreement
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Wind Energy
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Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
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The Spanish AGC System: Description and Analysis
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2009 Spain Publisher:Institute of Electrical and Electronics Engineers (IEEE)
Authors: Egido Cortés, Ignacio; Fernández Bernal, Fidel; Rouco Rodríguez, Luis;
doi: 10.1109/tpwrs.2008.2007003
handle: 11531/5212
doi: 10.1109/tpwrs.2008.2007003
handle: 11531/5212
Artículos en revistas This paper describes and analyzes the Spanish AGC system. The differences with respect to a standard hierarchical structure are explained. A simple model useful for simulation is proposed. Using this model, the performance of the system and the influence of several parameters in system response is evaluated. The paper also suggests some changes in the configuration and parameter settings of the system to improve its performance. info:eu-repo/semantics/publishedVersion
Recolector de Cienci...arrow_drop_down
Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2009 . Peer-reviewed
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IEEE Transactions on Power Systems
Journal
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24
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Recolector de Cienci...arrow_drop_down
Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2009 . Peer-reviewed
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IEEE Transactions on Power Systems
Journal
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The Spanish AGC System: Description and Analysis
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2009 Spain Publisher:Institute of Electrical and Electronics Engineers (IEEE)
Authors: Egido Cortés, Ignacio; Fernández Bernal, Fidel; Rouco Rodríguez, Luis;
doi: 10.1109/tpwrs.2008.2007003
handle: 11531/5212
doi: 10.1109/tpwrs.2008.2007003
handle: 11531/5212
Artículos en revistas This paper describes and analyzes the Spanish AGC system. The differences with respect to a standard hierarchical structure are explained. A simple model useful for simulation is proposed. Using this model, the performance of the system and the influence of several parameters in system response is evaluated. The paper also suggests some changes in the configuration and parameter settings of the system to improve its performance. info:eu-repo/semantics/publishedVersion
Recolector de Cienci...arrow_drop_down
Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2009 . Peer-reviewed
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Recolector de Ciencia Abierta, RECOLECTA
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Wind speed generation for dynamic analysis
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2017 Spain Publisher:Wiley
Authors: Fernández Bernal, Fidel; Alonso Alonso, Jesús;
doi: 10.1002/we.2079
handle: 11531/16971
doi: 10.1002/we.2079
handle: 11531/16971
AbstractA simple model to generate large band wind speed time sequences, especially easy to implement with a very reduced number of parameters, is presented. It is based on the calculation of a low‐frequency and a high‐frequency components. Low‐frequency component with 1 h sample time is obtained from a random process based on a conditional probability density function. Using real data from two different wind farms in two different months of the year, it has been found that Weibull distribution centered in the current hourly mean value seems to represent well the 1 h conditional PDF in all cases, and the standard deviation of this conditional Weibull is more or less in the range 1–1.3 m s−1 independently of the season of the year or the location. Regarding to high‐frequency component, low‐frequency samples are used as initial and final values and, between them, the turbulence component values are inserted. For that, it has been used a stochastic process based on a Beta probability function and a simple rescaling procedure with two non‐linear parameters, calculated in a recursive way. Unlike the usual modelling procedures presented in the literature, spectral power density functions are not used. This simplifies the implementation significantly. Ten second sample‐time real speed wind data from two different wind farms have been used to validate the proposed high‐frequency model, obtaining excellent results. A thorough revision of the main models found in the literature to produce wind speed time sequences for dynamic analysis is performed in the paper. Copyright © 2017 John Wiley & Sons, Ltd.
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Wind Energy
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Wind Energy
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Wind speed generation for dynamic analysis
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2017 Spain Publisher:Wiley
Authors: Fernández Bernal, Fidel; Alonso Alonso, Jesús;
doi: 10.1002/we.2079
handle: 11531/16971
doi: 10.1002/we.2079
handle: 11531/16971
AbstractA simple model to generate large band wind speed time sequences, especially easy to implement with a very reduced number of parameters, is presented. It is based on the calculation of a low‐frequency and a high‐frequency components. Low‐frequency component with 1 h sample time is obtained from a random process based on a conditional probability density function. Using real data from two different wind farms in two different months of the year, it has been found that Weibull distribution centered in the current hourly mean value seems to represent well the 1 h conditional PDF in all cases, and the standard deviation of this conditional Weibull is more or less in the range 1–1.3 m s−1 independently of the season of the year or the location. Regarding to high‐frequency component, low‐frequency samples are used as initial and final values and, between them, the turbulence component values are inserted. For that, it has been used a stochastic process based on a Beta probability function and a simple rescaling procedure with two non‐linear parameters, calculated in a recursive way. Unlike the usual modelling procedures presented in the literature, spectral power density functions are not used. This simplifies the implementation significantly. Ten second sample‐time real speed wind data from two different wind farms have been used to validate the proposed high‐frequency model, obtaining excellent results. A thorough revision of the main models found in the literature to produce wind speed time sequences for dynamic analysis is performed in the paper. Copyright © 2017 John Wiley & Sons, Ltd.
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Wind Energy
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Impact of wind on secondary regulating power and energy in the Spanish system
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2016 Spain Publisher:Wiley
Authors: Olea Arias, Javier; Lobato Miguélez, Enrique; Egido Cortés, Ignacio; Fernández Bernal, Fidel;
doi: 10.1002/we.1984
handle: 11531/15528
doi: 10.1002/we.1984
handle: 11531/15528
AbstractThe objective of this paper is to assess if high penetrations of wind power influence regulating secondary reserve requirements in the Spanish power system including three different topics: (i) needed ramps of variation of regulating power, (ii) amount of total regulating power and (iii) regulating energy. The results (both technical and economical) derived in this paper are based on the net load curve, defined as the difference between the load curve of the system and the wind generation curve. Since wind power does not provide yet secondary regulating reserve, net load represents the load that must be balanced by units providing the AGC service. Thus, the comparison of the three topics (ramps, regulating power and regulating energy) required by the net load with the ones required by the load curve represents the influence of wind on AGC requirements. Historical values of total demand and wind production with a 1 min resolution of the Spanish power system, collected for 2010 (when the wind share was close to 20%), are employed to derive significant conclusions. The analysis of this paper concludes that the main impact of wind in the Spanish system lies on the secondary regulating energy, while the required ramp rate and secondary reserve nearly not affected. Copyright © 2016 John Wiley & Sons, Ltd.
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Wind Energy
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Impact of wind on secondary regulating power and energy in the Spanish system
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2016 Spain Publisher:Wiley
Authors: Olea Arias, Javier; Lobato Miguélez, Enrique; Egido Cortés, Ignacio; Fernández Bernal, Fidel;
doi: 10.1002/we.1984
handle: 11531/15528
doi: 10.1002/we.1984
handle: 11531/15528
AbstractThe objective of this paper is to assess if high penetrations of wind power influence regulating secondary reserve requirements in the Spanish power system including three different topics: (i) needed ramps of variation of regulating power, (ii) amount of total regulating power and (iii) regulating energy. The results (both technical and economical) derived in this paper are based on the net load curve, defined as the difference between the load curve of the system and the wind generation curve. Since wind power does not provide yet secondary regulating reserve, net load represents the load that must be balanced by units providing the AGC service. Thus, the comparison of the three topics (ramps, regulating power and regulating energy) required by the net load with the ones required by the load curve represents the influence of wind on AGC requirements. Historical values of total demand and wind production with a 1 min resolution of the Spanish power system, collected for 2010 (when the wind share was close to 20%), are employed to derive significant conclusions. The analysis of this paper concludes that the main impact of wind in the Spanish system lies on the secondary regulating energy, while the required ramp rate and secondary reserve nearly not affected. Copyright © 2016 John Wiley & Sons, Ltd.
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Wind Energy
Article . 2016 . Peer-reviewed
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Maximum Frequency Deviation Calculation in Small Isolated Power Systems
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2009 Spain Publisher:Institute of Electrical and Electronics Engineers (IEEE)
Authors: Egido Cortés, Ignacio; Fernández Bernal, Fidel; Centeno López, Pablo; Rouco Rodríguez, Luis;
doi: 10.1109/tpwrs.2009.2030399
handle: 11531/5176
doi: 10.1109/tpwrs.2009.2030399
handle: 11531/5176
Artículos en revistas Large frequency deviations due to a number of disturbances are frequent in small isolated power systems. The maximum frequency deviation in the system is limited to prevent other generator tripping. It is important to have an accurate model to calculate it, both for system planning and operation. A new simplified model to calculate the maximum frequency deviation when either a generator or load-related disturbance occurs in these systems is presented. This model takes into account the response of governor- prime mover even when different technologies are present in the power system. Model parameters can be easily obtained from either more complex models or from test records. Simulation results for an actual power system aimed at checking the model accuracy are presented. High accuracy is obtained while computation time is reduced due to the simplicity of the model. info:eu-repo/semantics/publishedVersion
Recolector de Cienci...arrow_drop_down
Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2009 . Peer-reviewed
License: IEEE Copyright
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IEEE Transactions on Power Systems
Journal
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142
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Recolector de Cienci...arrow_drop_down
Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2009 . Peer-reviewed
License: IEEE Copyright
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Journal
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Maximum Frequency Deviation Calculation in Small Isolated Power Systems
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2009 Spain Publisher:Institute of Electrical and Electronics Engineers (IEEE)
Authors: Egido Cortés, Ignacio; Fernández Bernal, Fidel; Centeno López, Pablo; Rouco Rodríguez, Luis;
doi: 10.1109/tpwrs.2009.2030399
handle: 11531/5176
doi: 10.1109/tpwrs.2009.2030399
handle: 11531/5176
Artículos en revistas Large frequency deviations due to a number of disturbances are frequent in small isolated power systems. The maximum frequency deviation in the system is limited to prevent other generator tripping. It is important to have an accurate model to calculate it, both for system planning and operation. A new simplified model to calculate the maximum frequency deviation when either a generator or load-related disturbance occurs in these systems is presented. This model takes into account the response of governor- prime mover even when different technologies are present in the power system. Model parameters can be easily obtained from either more complex models or from test records. Simulation results for an actual power system aimed at checking the model accuracy are presented. High accuracy is obtained while computation time is reduced due to the simplicity of the model. info:eu-repo/semantics/publishedVersion
Recolector de Cienci...arrow_drop_down
Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2009 . Peer-reviewed
License: IEEE Copyright
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IEEE Transactions on Power Systems
Journal
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142
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Recolector de Cienci...arrow_drop_down
Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2009 . Peer-reviewed
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Lyapunov Stability Based Wide Area Control Systems for Excitation Boosters in Synchronous Generators
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2019 Spain Publisher:Institute of Electrical and Electronics Engineers (IEEE)
Authors: Luis Diez-Maroto; Javier Renedo; Luis Rouco; Fidel Fernandez-Bernal;
doi: 10.1109/tpwrs.2018.2865970
handle: 11531/30439
doi: 10.1109/tpwrs.2018.2865970
handle: 11531/30439
Artículos en revistas Excitation Boosters (EB) are aimed to improve Fault Ride Through (FRT) capability of synchronous generators equipped with bus fed static excitation systems by means of adding a supplementary voltage or current source to the rectifier. However, this paper shows that EBs governed by local On-Off controls may result in adverse effects in case of remote faults from generators that may occur in multi-machine systems. To sort this problem out, a novel EB Wide Area Control System (WACS) that modulates the EB voltage using the generator speed deviation with respect to the speed of the Center Of Inertia (COI) is proposed. The speed of the COI is obtained using a Wide Area Measuring System (WAMS), whereas the control laws are deduced from the Lyapunov stability theory. Results show that transient stability of multi-machine systems can be enhanced using EB WACS. info:eu-repo/semantics/publishedVersion
Recolector de Cienci...arrow_drop_down
Recolector de Ciencia Abierta, RECOLECTA
Article . 2018
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2019 . Peer-reviewed
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14
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Recolector de Ciencia Abierta, RECOLECTA
Article . 2018
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2019 . Peer-reviewed
License: IEEE Copyright
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Journal
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Lyapunov Stability Based Wide Area Control Systems for Excitation Boosters in Synchronous Generators
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2019 Spain Publisher:Institute of Electrical and Electronics Engineers (IEEE)
Authors: Luis Diez-Maroto; Javier Renedo; Luis Rouco; Fidel Fernandez-Bernal;
doi: 10.1109/tpwrs.2018.2865970
handle: 11531/30439
doi: 10.1109/tpwrs.2018.2865970
handle: 11531/30439
Artículos en revistas Excitation Boosters (EB) are aimed to improve Fault Ride Through (FRT) capability of synchronous generators equipped with bus fed static excitation systems by means of adding a supplementary voltage or current source to the rectifier. However, this paper shows that EBs governed by local On-Off controls may result in adverse effects in case of remote faults from generators that may occur in multi-machine systems. To sort this problem out, a novel EB Wide Area Control System (WACS) that modulates the EB voltage using the generator speed deviation with respect to the speed of the Center Of Inertia (COI) is proposed. The speed of the COI is obtained using a Wide Area Measuring System (WAMS), whereas the control laws are deduced from the Lyapunov stability theory. Results show that transient stability of multi-machine systems can be enhanced using EB WACS. info:eu-repo/semantics/publishedVersion
Recolector de Cienci...arrow_drop_down
Recolector de Ciencia Abierta, RECOLECTA
Article . 2018
Data sources: Recolector de Ciencia Abierta, RECOLECTA
IEEE Transactions on Power Systems
Article . 2019 . Peer-reviewed
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14
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Recolector de Ciencia Abierta, RECOLECTA
Article . 2018
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IEEE Transactions on Power Systems
Article . 2019 . Peer-reviewed
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Evaluation of Automatic Generation Control (AGC) regulators by performance indices using data from real operation
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2007 Spain Publisher:Institution of Engineering and Technology (IET)
Authors: Egido Cortés, Ignacio; Fernández Bernal, Fidel; Rouco Rodríguez, Luis;
doi: 10.1049/iet-gtd:20060173
handle: 11531/5285
doi: 10.1049/iet-gtd:20060173
handle: 11531/5285
Artículos en revistas Indices to evaluate AGC performance under both simulation and real operation are presented. These indices are based on functional dependence and statistical analysis avoiding large and long periods of data collection necessary for comparison of different regulators in real operation. A method to perform the global evaluation of the regulator using the individual values obtained for the indices is also presented. Variables typically measured in power systems are used to compute the indices. Examples of calculated values of the indices using data from real operation of two regulators in the same area of the Spanish power system are presented. Response criterion imposed in the Spanish power system is used. info:eu-repo/semantics/publishedVersion
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Evaluation of Automatic Generation Control (AGC) regulators by performance indices using data from real operation
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2007 Spain Publisher:Institution of Engineering and Technology (IET)
Authors: Egido Cortés, Ignacio; Fernández Bernal, Fidel; Rouco Rodríguez, Luis;
doi: 10.1049/iet-gtd:20060173
handle: 11531/5285
doi: 10.1049/iet-gtd:20060173
handle: 11531/5285
Artículos en revistas Indices to evaluate AGC performance under both simulation and real operation are presented. These indices are based on functional dependence and statistical analysis avoiding large and long periods of data collection necessary for comparison of different regulators in real operation. A method to perform the global evaluation of the regulator using the individual values obtained for the indices is also presented. Variables typically measured in power systems are used to compute the indices. Examples of calculated values of the indices using data from real operation of two regulators in the same area of the Spanish power system are presented. Response criterion imposed in the Spanish power system is used. info:eu-repo/semantics/publishedVersion
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Maximum wind power generation in a power system imposed by system inertia and primary reserve requirements
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2014 Spain Publisher:Wiley
Authors: Fernández Bernal, Fidel; Egido Cortés, Ignacio; Lobato Miguélez, Enrique;
doi: 10.1002/we.1773
handle: 11531/4827
doi: 10.1002/we.1773
handle: 11531/4827
AbstractAlthough the technology to simulate inertia or to provide primary control in wind power generators is mature, most of them are a source of power with neither inertia nor primary reserve provision mainly because it means wind spilling. Therefore, an increasing wind power penetration means a reduction in the inertia of the system and of the primary reserve due to the substitution of conventional generation. In this paper, the maximum wind power penetration focusing on system inertia and primary reserve value is assessed. The Spanish power system is used as an example for the calculation of these values. For this purpose, real Spanish scenario data are used. Results will show that high penetrations of wind power can be achieved without risking adequate values of primary reserve or inertia of the power system even if wind power does not contribute to these items. Copyright © 2014 John Wiley & Sons, Ltd.
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Maximum wind power generation in a power system imposed by system inertia and primary reserve requirements
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2014 Spain Publisher:Wiley
Authors: Fernández Bernal, Fidel; Egido Cortés, Ignacio; Lobato Miguélez, Enrique;
doi: 10.1002/we.1773
handle: 11531/4827
doi: 10.1002/we.1773
handle: 11531/4827
AbstractAlthough the technology to simulate inertia or to provide primary control in wind power generators is mature, most of them are a source of power with neither inertia nor primary reserve provision mainly because it means wind spilling. Therefore, an increasing wind power penetration means a reduction in the inertia of the system and of the primary reserve due to the substitution of conventional generation. In this paper, the maximum wind power penetration focusing on system inertia and primary reserve value is assessed. The Spanish power system is used as an example for the calculation of these values. For this purpose, real Spanish scenario data are used. Results will show that high penetrations of wind power can be achieved without risking adequate values of primary reserve or inertia of the power system even if wind power does not contribute to these items. Copyright © 2014 John Wiley & Sons, Ltd.
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The Spanish AGC System: Description and Analysis
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2009 Spain Publisher:Institute of Electrical and Electronics Engineers (IEEE)
Authors: Egido Cortés, Ignacio; Fernández Bernal, Fidel; Rouco Rodríguez, Luis;
doi: 10.1109/tpwrs.2008.2007003
handle: 11531/5212
doi: 10.1109/tpwrs.2008.2007003
handle: 11531/5212
Artículos en revistas This paper describes and analyzes the Spanish AGC system. The differences with respect to a standard hierarchical structure are explained. A simple model useful for simulation is proposed. Using this model, the performance of the system and the influence of several parameters in system response is evaluated. The paper also suggests some changes in the configuration and parameter settings of the system to improve its performance. info:eu-repo/semantics/publishedVersion
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The Spanish AGC System: Description and Analysis
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2009 Spain Publisher:Institute of Electrical and Electronics Engineers (IEEE)
Authors: Egido Cortés, Ignacio; Fernández Bernal, Fidel; Rouco Rodríguez, Luis;
doi: 10.1109/tpwrs.2008.2007003
handle: 11531/5212
doi: 10.1109/tpwrs.2008.2007003
handle: 11531/5212
Artículos en revistas This paper describes and analyzes the Spanish AGC system. The differences with respect to a standard hierarchical structure are explained. A simple model useful for simulation is proposed. Using this model, the performance of the system and the influence of several parameters in system response is evaluated. The paper also suggests some changes in the configuration and parameter settings of the system to improve its performance. info:eu-repo/semantics/publishedVersion
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Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
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Wind speed generation for dynamic analysis
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2017 Spain Publisher:Wiley
Authors: Fernández Bernal, Fidel; Alonso Alonso, Jesús;
doi: 10.1002/we.2079
handle: 11531/16971
doi: 10.1002/we.2079
handle: 11531/16971
AbstractA simple model to generate large band wind speed time sequences, especially easy to implement with a very reduced number of parameters, is presented. It is based on the calculation of a low‐frequency and a high‐frequency components. Low‐frequency component with 1 h sample time is obtained from a random process based on a conditional probability density function. Using real data from two different wind farms in two different months of the year, it has been found that Weibull distribution centered in the current hourly mean value seems to represent well the 1 h conditional PDF in all cases, and the standard deviation of this conditional Weibull is more or less in the range 1–1.3 m s−1 independently of the season of the year or the location. Regarding to high‐frequency component, low‐frequency samples are used as initial and final values and, between them, the turbulence component values are inserted. For that, it has been used a stochastic process based on a Beta probability function and a simple rescaling procedure with two non‐linear parameters, calculated in a recursive way. Unlike the usual modelling procedures presented in the literature, spectral power density functions are not used. This simplifies the implementation significantly. Ten second sample‐time real speed wind data from two different wind farms have been used to validate the proposed high‐frequency model, obtaining excellent results. A thorough revision of the main models found in the literature to produce wind speed time sequences for dynamic analysis is performed in the paper. Copyright © 2017 John Wiley & Sons, Ltd.
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Wind speed generation for dynamic analysis
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2017 Spain Publisher:Wiley
Authors: Fernández Bernal, Fidel; Alonso Alonso, Jesús;
doi: 10.1002/we.2079
handle: 11531/16971
doi: 10.1002/we.2079
handle: 11531/16971
AbstractA simple model to generate large band wind speed time sequences, especially easy to implement with a very reduced number of parameters, is presented. It is based on the calculation of a low‐frequency and a high‐frequency components. Low‐frequency component with 1 h sample time is obtained from a random process based on a conditional probability density function. Using real data from two different wind farms in two different months of the year, it has been found that Weibull distribution centered in the current hourly mean value seems to represent well the 1 h conditional PDF in all cases, and the standard deviation of this conditional Weibull is more or less in the range 1–1.3 m s−1 independently of the season of the year or the location. Regarding to high‐frequency component, low‐frequency samples are used as initial and final values and, between them, the turbulence component values are inserted. For that, it has been used a stochastic process based on a Beta probability function and a simple rescaling procedure with two non‐linear parameters, calculated in a recursive way. Unlike the usual modelling procedures presented in the literature, spectral power density functions are not used. This simplifies the implementation significantly. Ten second sample‐time real speed wind data from two different wind farms have been used to validate the proposed high‐frequency model, obtaining excellent results. A thorough revision of the main models found in the literature to produce wind speed time sequences for dynamic analysis is performed in the paper. Copyright © 2017 John Wiley & Sons, Ltd.
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Impact of wind on secondary regulating power and energy in the Spanish system
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2016 Spain Publisher:Wiley
Authors: Olea Arias, Javier; Lobato Miguélez, Enrique; Egido Cortés, Ignacio; Fernández Bernal, Fidel;
doi: 10.1002/we.1984
handle: 11531/15528
doi: 10.1002/we.1984
handle: 11531/15528
AbstractThe objective of this paper is to assess if high penetrations of wind power influence regulating secondary reserve requirements in the Spanish power system including three different topics: (i) needed ramps of variation of regulating power, (ii) amount of total regulating power and (iii) regulating energy. The results (both technical and economical) derived in this paper are based on the net load curve, defined as the difference between the load curve of the system and the wind generation curve. Since wind power does not provide yet secondary regulating reserve, net load represents the load that must be balanced by units providing the AGC service. Thus, the comparison of the three topics (ramps, regulating power and regulating energy) required by the net load with the ones required by the load curve represents the influence of wind on AGC requirements. Historical values of total demand and wind production with a 1 min resolution of the Spanish power system, collected for 2010 (when the wind share was close to 20%), are employed to derive significant conclusions. The analysis of this paper concludes that the main impact of wind in the Spanish system lies on the secondary regulating energy, while the required ramp rate and secondary reserve nearly not affected. Copyright © 2016 John Wiley & Sons, Ltd.
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Impact of wind on secondary regulating power and energy in the Spanish system
descriptionPublicationkeyboard_double_arrow_right Article , Journal 2016 Spain Publisher:Wiley
Authors: Olea Arias, Javier; Lobato Miguélez, Enrique; Egido Cortés, Ignacio; Fernández Bernal, Fidel;
doi: 10.1002/we.1984
handle: 11531/15528
doi: 10.1002/we.1984
handle: 11531/15528
AbstractThe objective of this paper is to assess if high penetrations of wind power influence regulating secondary reserve requirements in the Spanish power system including three different topics: (i) needed ramps of variation of regulating power, (ii) amount of total regulating power and (iii) regulating energy. The results (both technical and economical) derived in this paper are based on the net load curve, defined as the difference between the load curve of the system and the wind generation curve. Since wind power does not provide yet secondary regulating reserve, net load represents the load that must be balanced by units providing the AGC service. Thus, the comparison of the three topics (ramps, regulating power and regulating energy) required by the net load with the ones required by the load curve represents the influence of wind on AGC requirements. Historical values of total demand and wind production with a 1 min resolution of the Spanish power system, collected for 2010 (when the wind share was close to 20%), are employed to derive significant conclusions. The analysis of this paper concludes that the main impact of wind in the Spanish system lies on the secondary regulating energy, while the required ramp rate and secondary reserve nearly not affected. Copyright © 2016 John Wiley & Sons, Ltd.
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Wind Energy
Article . 2016 . Peer-reviewed
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Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
Data sources: Recolector de Ciencia Abierta, RECOLECTA
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Wind Energy
Journal
Data sources: Microsoft Academic Graph
Recolector de Ciencia Abierta, RECOLECTA
Article . 2016
Data sources: Recolector de Ciencia Abierta, RECOLECTA
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Energy Research

Maximum Frequency Deviation Calculation in Small Isolated Power Systems

Maximum Frequency Deviation Calculation in Small Isolated Power Systems

Lyapunov Stability Based Wide Area Control Systems for Excitation Boosters in Synchronous Generators

Lyapunov Stability Based Wide Area Control Systems for Excitation Boosters in Synchronous Generators

Evaluation of Automatic Generation Control (AGC) regulators by performance indices using data from real operation

Evaluation of Automatic Generation Control (AGC) regulators by performance indices using data from real operation

Maximum wind power generation in a power system imposed by system inertia and primary reserve requirements

Maximum wind power generation in a power system imposed by system inertia and primary reserve requirements

The Spanish AGC System: Description and Analysis

The Spanish AGC System: Description and Analysis

Wind speed generation for dynamic analysis

Wind speed generation for dynamic analysis

Impact of wind on secondary regulating power and energy in the Spanish system

Impact of wind on secondary regulating power and energy in the Spanish system

Maximum Frequency Deviation Calculation in Small Isolated Power Systems

Maximum Frequency Deviation Calculation in Small Isolated Power Systems

Lyapunov Stability Based Wide Area Control Systems for Excitation Boosters in Synchronous Generators

Lyapunov Stability Based Wide Area Control Systems for Excitation Boosters in Synchronous Generators

Evaluation of Automatic Generation Control (AGC) regulators by performance indices using data from real operation

Evaluation of Automatic Generation Control (AGC) regulators by performance indices using data from real operation

Maximum wind power generation in a power system imposed by system inertia and primary reserve requirements

Maximum wind power generation in a power system imposed by system inertia and primary reserve requirements

The Spanish AGC System: Description and Analysis

The Spanish AGC System: Description and Analysis

Wind speed generation for dynamic analysis

Wind speed generation for dynamic analysis

Impact of wind on secondary regulating power and energy in the Spanish system

Impact of wind on secondary regulating power and energy in the Spanish system

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