STATCOM并联运行控制方法的研究  

Control Method for Parallel Operation of STATCOM

作　　者：同向前[1] 吴庆范[1] 尹军[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048

出　　处：《西安理工大学学报》2008年第4期426-430,共5页Journal of Xi'an University of Technology

摘　　要：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。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 paral- leled 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 accord- ing to the rated capacity ratio and then outputs corresponding current under the control of its current regulator. A simulation system for this parallel operation scheme is established, and the simulation results show that this scheme has an excellent compensation performance even if a fault STATCOM goes out of service.

关 键 词：静止同步补偿器 无功补偿 并联运行 模块化 分散控制 

分 类 号：TM761[电气工程—电力系统及自动化]