Frequency regulation method with congestion management using renewable energy curtailment

Abstract

In power systems with a large amount of renewable energy sources, the frequency management is an important issue. In particular, the uncertain output fluctuation depending on weather condition has a large impact on supply and demand balance. On the other hand, under deregulation in the electric power industry, the utilization of power market will be more important to deal with their uncertain output. However, when the renewable energy integration is realized with many new players under the deregulation, the power flow management becomes more complex. Hence, in order to keep the power flow profile within a certain allowable range, we have proposed frequency regulation method by applying renewable energy curtailment, and also we take into account congestion management in the transmission network based on price signals. The proposed method was tested in IEEE 39 bus system and its effectiveness was shown.