• Energy Research

Forecasting and acquiring of short-term demand for frequency control reserve is a significant driver of cost for transmission system operators (TSO). A method is presented of identifying the significance of different factors by analyzing the correlation between historical data of actual reserve activation and renewable energy feed-ins, planned and unplanned power plant outages, vertical load, renewable energy forecasting errors and balancing energy provision. Application of this method shows that balancing energy has a moderate influence on the activation of secondary reserve. It has also been found that for minute reserves, corresponding activation of secondary reserves shows weak influence. Quarter-hourly prior activation of reserves also has a significant influence on the demand for control power. The analysis shows insignificant correlation between the investigated factors and the demand for secondary control reserves and minute reserves.

Environmental concerns and policy directives coupled with renewable energy penetration targets in Europe and United States are leading to a greater need for identifying technical and economic characteristics that facilitate the integration of electric vehicles (EVs) in the electricity network. An important step in mitigating instability associated with unregulated EV charging and renewable power feed‐in is the integration of EVs as providers of load frequency control (LFC). This study presents an evaluation of six European and North American LFC systems on the basis of EV characteristics to identify suitability for EV integration. The evaluation shows that the Eastern Denmark network is most feasible for frequency containment and restoration reserve using EVs.