Analysis of the main circuit parameter design method of subsynchronous oscillation suppression device

Wind power as the representative of large-scale new energy integration is the main form of China's new energy utilization. However, the risk of subsynchronous oscillation caused by the integration of new energy sources is common in large new energy base. It has become an important problem in the safe and efficient operation of large-scale new energy sources. In this paper, the typical wind power and subsynchronous oscillation are described first, and the initial conditions of device design are extracted. Then, the main circuit design of wind power subsynchronous oscillation suppression device is expounded in detail. The connection reactance, module number and module capacitor are deduced theoretically. A set of applicable main circuit parameters is proposed for typical system requirements. Then, an electromagnetic transient model of subsynchronous oscillation suppression device is built based on PSCAD simulation environment, and the design method of the above parameters is verified. The results show that all the indexes meet the expectations and verify the correctness of the parameter design method.