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The purpose of this research is to determine the effective way of implementation of the control algorithm, as an important functional part of information and control computer systems. The search criterion is the minimum of internal hardware FPGA resources required for the control unit implementation. This criterion allows miniaturization of dimensions, improves reliability by reducing the number of interconnections inside the chip, and ensures the possibility of a compact arrangement of various system components, which is especially important when using the “system-on-chip” design technology. The control unit holds a prominent place in the digital information and control systems. A comparative analysis of two control unit models represented as a finite state machine with either hard or programmable logic was proposed. Advantages and disadvantages of both models were determined according to the peculiarities of the information and control system algorithms, and, it was proved that the FSM model with a programmable logic matched these peculiarities in a greater degree. The purpose of this study was achieved due to the application of the proposed method for the implementation of the FSM with the programmable logic using the embedded memory of the FPGA and ProASIC chips. The main result was a substantial decrease in the LUT number used. The experimental results were obtained applying the chips of the world's top manufacturers - Xilinx, Altera/Intel, Microsemi. The studies were carried out based on the onboard computing complex control algorithm.

The purpose of this research is to determine the effective way of implementation of the control algorithm, as an important functional part of information and control computer systems. The search criterion is the minimum of internal hardware FPGA resources required for the control unit implementation. This criterion allows miniaturization of dimensions, improves reliability by reducing the number of interconnections inside the chip, and ensures the possibility of a compact arrangement of various system components, which is especially important when using the “system-on-chip” design technology. The control unit holds a prominent place in the digital information and control systems. A comparative analysis of two control unit models represented as a finite state machine with either hard or programmable logic was proposed. Advantages and disadvantages of both models were determined according to the peculiarities of the information and control system algorithms, and, it was proved that the FSM model with a programmable logic matched these peculiarities in a greater degree. The purpose of this study was achieved due to the application of the proposed method for the implementation of the FSM with the programmable logic using the embedded memory of the FPGA and ProASIC chips. The main result was a substantial decrease in the LUT number used. The experimental results were obtained applying the chips of the world's top manufacturers - Xilinx, Altera/Intel, Microsemi. The studies were carried out based on the onboard computing complex control algorithm.

The analysis of the world electric-energy balance revealed the advantage of steam turbine plants. An increase in their efficiency through the improvement of the initial parameters runs into difficulties associated with creation of new materials. The efficiency increase that results from the final pressure reduction requires an improvement of the circulating water supply system. The aim of this work is to determine the effect of the water-cooling tower on the electric power station profitability. This goal was reached by the creation of a mathematical model of the water-cooling tower and turbine plant with a condenser connected to each other. The calculations were made for two types of cooling tower fill packing: asbestos cement sheets and mesh elements made of polyethylene. Further, according to it, the vapor condensation temperature was determined. The latter affects the vapor discharge in the condenser, the capacity of the turbine plant and the temperature of the cooling water at the condenser output, i.e. at the cooling tower input. The novelty of this work consisted of consideration of the interaction between the cooling tower and turbine plant. Significance of the obtained results lies in the fact that, taking into account the reciprocal influence of the turbine plant and cooling tower, the efficiency of the fill packing replacement turns out to be major comparatively to the case without considering this influence. The replacement of the fill packings the half-a-year average temperature of condensation will become lower by 2.34 °С, electricity production increases by 41.72 GWh.

The analysis of the world electric-energy balance revealed the advantage of steam turbine plants. An increase in their efficiency through the improvement of the initial parameters runs into difficulties associated with creation of new materials. The efficiency increase that results from the final pressure reduction requires an improvement of the circulating water supply system. The aim of this work is to determine the effect of the water-cooling tower on the electric power station profitability. This goal was reached by the creation of a mathematical model of the water-cooling tower and turbine plant with a condenser connected to each other. The calculations were made for two types of cooling tower fill packing: asbestos cement sheets and mesh elements made of polyethylene. Further, according to it, the vapor condensation temperature was determined. The latter affects the vapor discharge in the condenser, the capacity of the turbine plant and the temperature of the cooling water at the condenser output, i.e. at the cooling tower input. The novelty of this work consisted of consideration of the interaction between the cooling tower and turbine plant. Significance of the obtained results lies in the fact that, taking into account the reciprocal influence of the turbine plant and cooling tower, the efficiency of the fill packing replacement turns out to be major comparatively to the case without considering this influence. The replacement of the fill packings the half-a-year average temperature of condensation will become lower by 2.34 °С, electricity production increases by 41.72 GWh.

A typical way for obtaining the characteristics of the electric machines are the methods based on the theory of the magnetic circuits. These methods contain assumptions that lead to significant errors in the calculation results. Modern software allows to perform calculations of the magnetic fields using the numerical methods, and, it is thus possible to obtain more adequate characteristics of the electric machines, which are indicative of their working properties in operation. Hence, the aim of this study is to describe the method of obtaining the characteristics of a high power turbogenerator by the calculation of its magnetic fields. The proposed methods for determining the characteristics of the electric machine under study are based on the iterative methods using the automated numerical calculations of the magnetic fields. The calculations were carried out using the FEMM software finite element method and the Lua script. The paper presents characteristics of turbogenerator such as the idle speed and short circuit, angular, stator winding excitation, adjusting and U-shaped. The adequacy of the calculations was checked by comparing the obtained characteristics with those calculated by classical methods. The most important results of the work are the obtained differences in determining the characteristics by numerical calculation and calculations using the theory of magnetic circuits. Their significance lies in the fact that the modernization of turbogenerators often takes an increase in their power by an amount commensurate with the error by using the classical method of obtaining characteristics based on the theory of magnetic circuits.

A typical way for obtaining the characteristics of the electric machines are the methods based on the theory of the magnetic circuits. These methods contain assumptions that lead to significant errors in the calculation results. Modern software allows to perform calculations of the magnetic fields using the numerical methods, and, it is thus possible to obtain more adequate characteristics of the electric machines, which are indicative of their working properties in operation. Hence, the aim of this study is to describe the method of obtaining the characteristics of a high power turbogenerator by the calculation of its magnetic fields. The proposed methods for determining the characteristics of the electric machine under study are based on the iterative methods using the automated numerical calculations of the magnetic fields. The calculations were carried out using the FEMM software finite element method and the Lua script. The paper presents characteristics of turbogenerator such as the idle speed and short circuit, angular, stator winding excitation, adjusting and U-shaped. The adequacy of the calculations was checked by comparing the obtained characteristics with those calculated by classical methods. The most important results of the work are the obtained differences in determining the characteristics by numerical calculation and calculations using the theory of magnetic circuits. Their significance lies in the fact that the modernization of turbogenerators often takes an increase in their power by an amount commensurate with the error by using the classical method of obtaining characteristics based on the theory of magnetic circuits.

The work solves the problem of assessing the operation modes of the Integrated Power System (IPS) of Ukraine taking into account the power flows increase to the states borders for integration into the ENTSO-E power system. The Transmission System Development Plan for 2021-2030 is considered, in which the construction of southern transit power lines is planned. The issue of the redistribution of power flows in the electric network with the possibility of transferring power from the eastern regions of Ukraine to the western ones is considered. The analysis of the optimal increase in the connection cross-section into ENTSO-E networks by introducing southern transit. The purpose of the work is to analyze and evaluate the introduction of southern transit power lines by a high voltage direct current network based on voltage source converters in the electric network of the Ukraine power system. This problem was solved with creating a model of an electric network of 750 and 330 kV of the Ukraine IPS, analyzing the simulation results and comparing the network operation modes when introducing southern transit by an alternating and direct current. The most significant results of the work are the proof of the technical feasibility of introducing southern transit on direct current with the ability to influence the capacities flow distribution. Significance of the obtained results consists in the development of the Ukraine IPS model with the direct current lines introduction, which allows to analyze the electric network operating modes while introduction of southern transit by direct current.

The work solves the problem of assessing the operation modes of the Integrated Power System (IPS) of Ukraine taking into account the power flows increase to the states borders for integration into the ENTSO-E power system. The Transmission System Development Plan for 2021-2030 is considered, in which the construction of southern transit power lines is planned. The issue of the redistribution of power flows in the electric network with the possibility of transferring power from the eastern regions of Ukraine to the western ones is considered. The analysis of the optimal increase in the connection cross-section into ENTSO-E networks by introducing southern transit. The purpose of the work is to analyze and evaluate the introduction of southern transit power lines by a high voltage direct current network based on voltage source converters in the electric network of the Ukraine power system. This problem was solved with creating a model of an electric network of 750 and 330 kV of the Ukraine IPS, analyzing the simulation results and comparing the network operation modes when introducing southern transit by an alternating and direct current. The most significant results of the work are the proof of the technical feasibility of introducing southern transit on direct current with the ability to influence the capacities flow distribution. Significance of the obtained results consists in the development of the Ukraine IPS model with the direct current lines introduction, which allows to analyze the electric network operating modes while introduction of southern transit by direct current.