Dynamic Reactive Power Optimization in Weak Sending-side Systems: Method and Case Studies

摘要

In order to transmit wind powers to the long-distance load centers in China, large-scale wind power centralized integrated into the weak sending-side systems becomes a major way to use wind energies, which causes a lot of voltage-related challenges. Dynamic reactive power (DRP) plays an important role in voltage problems due to the fast response in terms of the disturbances and contingencies. How to optimize the DRP devices to provide fast voltage support is crucial to the sending-side system. Therefore, this paper proposes a DRP optimization method for large-scale wind farms to compute the set value of all the DRP devices under normal conditions. The DRP computation can be completed by four steps exchanging information between the integrated stations and wind farms. The wind farms in Gansu Power Grid are used to test the proposed method, and the simulation results shows the effectiveness of the proposed method.