系统电压不平衡下链式静止同步补偿器控制研究  

Research on Cascade Multilevel STATCOM Under Unbalanced System Voltage

作　　者：刘钊[1] 刘邦银[2] 段善旭[2] 康勇[2] 史晏军[2] 陈仲伟[2] 

机构地区：[1]南京电子技术研究所,江苏省南京市210039 [2]华中科技大学电气与电子工程学院,湖北省武汉市430074

出　　处：《中国电机工程学报》2011年第9期1-7,共7页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973项目)(2009CB219701)~~

摘　　要：针对三角形连接的链式静止同步补偿器(static synchronous compensator,STATCOM)系统电压不平衡下的控制问题,提出分相瞬时电流控制策略,在此基础上研究了链式STATCOM在不平衡电压下的补偿模式,提出无功补偿和电压控制2种改进型补偿模式,并设计了其离散化电流环控制器。通过分相瞬时电流控制能够维持链式STATCOM在不平衡电压下的正常工作,2种改进型补偿模式使链式STATCOM能够有效的对不平衡系统进行补偿,仿真验证了所提控制策略及补偿模式。研制了一台三相36个链节的物理样机,并在样机上进行实验,证明了所提方法的正确性和有效性。The individual phase instantaneous current control strategy was proposed to solve problems about delta-connected cascade multilevel static synchronous compensators（STATCOM） under unbalanced system voltage;on this basis,two modified compensation modes,reactive control mode and voltage control mode,were studied;and the discrete current loop controller was designed.The cascade multilevel STATCOM can maintain normal operation under unbalanced voltage by using the individual phase instantaneous current control strategy;and the unbalanced system can be effectively compensated by the two modified compensation modes.Simulation results were given;and experiments were conducted based on the development of a prototype for three-phase and 36-chain STATCOM,so as to verify the effectiveness of the proposed control strategy and compensation modes.

关 键 词：静止同步补偿器 级联多电平 分相瞬时电流控制 补偿模式 离散化 

分 类 号：TM46[电气工程—电器]