基于等面积准则的含电流限幅虚拟同步机控制暂态稳定性分析

High proportion of power electronic equipment integrated power System makes the modern power System present completely different characteristics from the conventional one. The transient stability of Virtual synchronous generator (VSG) with current limiting is studied based on the equal area criterion (EAC). Based on the simplified second-order nonlinear model obtained from the difference in response speed be-tween the inner-loop control and Virtual synchronous control of VSG, a dynamic switching System model is constructed, and the stabilizing mechanism of the grid-connected VSG System is analyzed by applying the EAC to derive the conservative stabilizing conditions of the System. The saturated current vector angle con-figuration scheme is put forward to improve the System s anti-interference capability. The research model of a single VSG connected to an infinite bus via a transmission line is simulated and analyzed in PSCAD / EMTDC,and the results verify the accuracy of the derived stability conditions.