基于预测电流控制的SEIG电压稳定研究

Voltage Stability Strategy of Self-excited Induction Generator Based on Predictive Current Control

针对自励异步发电机(SEIG)加载出现的机端电压跌落问题,设计了一种采用静止同步补偿器(STATCOM)并联无功补偿的稳压系统,以维持加载运行情况下机端电压的稳定。为实现指令电流良好的动态响应和更快的指令跟踪控制,对电流内环控制器采用了预测电流控制(PCC)方法,最终实现机端电压暂态调节性能和控制系统自适应能力的提高。仿真结果表明,所采用的预测电流控制方法与传统的比例-积分(PI)控制比较,能更有效提高SEIG的带载能力和电流跟踪能力,机端电压在加载瞬间表现出更好的鲁棒性和调节能力。仿真结果验证了预测电流控制方法的有效性和可行性。

To deal with the voltage sag problem of the stand-alone self-excited induction generator(SEIG)when loading, a voltage regulation system based on the static synchronous compensator(STATCOM) is designed to maintain a constant terminal voltage of SEIG under loading conditions. In order to improve the transient performance and adaptation ability of the voltage regulation system, a predictive current control(PCC)method is proposed to design inner loop current controllers so that the transient performance and adaptation ability of the voltage regulation system will ultimately improve. Simulation results show that the proposed approach can improve the loading capacity and current tracking capabilities of SEIG very well compared with the classical methods. Terminal voltage performs well in robustness and regulation when loading. It has been shown that the proposed control method works very effectively.