STATCOM并联运行控制方法的研究

多个静止同步补偿器（STATCOM）模块并联运行是解决补偿容量与开关频率之间矛盾的有效途径。在分析了现有多模块并联结构特点的基础上，提出一种分散控制型多模块并联运行方案。多个STATCOM模块完全独立地并联连接于电网中，它们共用一套电流互感器，每个模块都对该电流进行检测并计算无功电流总量，然后按照各模块额定容量的比例进行分配以形成各个模块的无功补偿电流指令，在模块电流控制器的作用下输出相应的无功补偿电流。建立了STATCOM多模块并联运行仿真系统，仿真结果表明，该方案即使在故障模块退出运行后仍能具有良好的无功补偿效果。

Control Method for Parallel Operation of STATCOM

The parallel operation of multiple STATCOMs is a better way to solve the contradiction between the compensating capacity and switching frequency.A parallel operation scheme with distributed controllers was proposed by analyzing the defects of existing parallel system.All the STATCOM are paralleled to the grid independently and each detects the current from the common current transformer.Each STATCOM calculates the reactive component of the current,and distributes its current reference according to the rated...