不对称补偿时STATCOM的PI解耦控制

PI Decoupling Control of STATCOM in the Case of Unsymmetrical Load

提出了一种动态响应快,无静态误差,可用于补偿不对称负载的STATCOM的控制方法。该控制方法克服了传统dq变换只能应用在对称系统中的局限,对于对称系统,该方法能补偿无功电流;对于不对称系统,不仅能补偿无功电流,还能补偿负序电流。采用MATLAB中的Power Sim System对本方法进行仿真分析,仿真结果验证了该方法的正确性和有效性。

This paper presents a control mode of STATCOM, which has a fast dynamic response, zero static error, compensate unsymmetrical load. This control mode overcomes the limitation of traditional dq transform which could only use in the symmetrical system. This method could compensate reactive in the symmetrical system but also negative-phase sequence current in the unsymmetrical system. The results of simulation indicate that this method can be used successfully.