Dynamic Reactive Power Optimization Model for a Wind Farms and Energy Storage Combined System

Abstract

In the context of the energy crisis and environmental problems, renewable energy has burgeoned in recent years. However, with the increasing proportion of wind power access, the dynamic reactive power reserve and support capacity of the system is sharply reduced, and the problem of system voltage stability is prominent. As one of the essential auxiliary means for the power system, the traditional reactive power optimization plays a vital role in improving power quality and reducing active power loss. Wind power and storage devices can output not only active power but also has excellent reactive power output capacity. This paper establishes a wind power and energy storage system (ESS) combined reactive power optimization model and analyzes the effects of the model on the modified IEEE 24-BUS system under the objective function of minimizing the system loss and the wind power curtailment. The results show that the wind and ESS combined reactive power optimization is conducive to the stability of the power grid and can maximize the accommodation of renewable energy.