补偿负序电流的角形结构链式STATCOM环流参考值研究

Investigation on Circulating Current Reference of Cascade STATCOM with Delta Configuration for Negative Sequence Current Compensation

在综合分析角形结构链式静止同步补偿器(STATCOM)电流关系、桥臂电流负序分量和桥臂有功功率的基础上,基于桥臂电容电压平衡控制、负荷电流负序分量和系统线电压相角,提出了一种共同生成环流参考值的新方法。经MATLAB/Simulink仿真分析,所提方法的共同生成环流参考值可以有效地实现角形结构链式STATCOM。

The cascade static synchronous compensator（ STATCOM） with delta configuration is usually used to compensate negative sequence currents,and its reference value of circulating currents determines the stabilization of the capacitor voltages. Based on a comprehensive analysis of the current relationship of the cascade STATCOM with delta configuration,the negative sequence current components as well as active power of the bridge arms,the reference value can be mutually produced by the bridge arm capacitor voltage balancing control,load current negative sequence component and system line-to-line voltage phase angle. The simulation results by MATLAB /Simulink prove the feasibility and effectiveness of the control method by using this mutually produced reference values for the cascade STATCOM with delta configuration.