基于分散控制的级联静止同步补偿器直流侧电压均衡控制  

DC-side Voltage Balance Control for Cascaded STATCOM Based on Distributed Control

作　　者：徐晨[1] 戴珂[1] 陈晶晶[1] 彭繁[1] 康勇[1] 

机构地区：[1]华中科技大学强电磁工程与新技术国家重点实验室,湖北武汉430074

出　　处：《大功率变流技术》2011年第4期32-37,共6页HIGH POWER CONVERTER TECHNOLOGY

基　　金：台达2010电力电子科教发展计划项目(DREG2010009)

摘　　要：基于单极倍频与载波移相相结合的调制算法,分析了级联静止同步补偿器直流侧电容电压不平衡机理,根据分散控制的方法,提出了通过改变输入单链节的瞬时有功功率来平衡直流侧电容电压的控制策略。该策略可在每一个逆变单元里独立实现,与相邻逆变单元不存在耦合,且不需要额外检测其他物理量,具有可靠性高、易于实现等优点。仿真和样机实验验证了该控制策略的可行性和有效性。It analyses the DC capacitor voltage imbalance mechanism of cascaded STATCOM based on unipolar dual frequency carrier phase-shifted SPWM（CPS-SPWM） modulation,presents a DC capacitor voltage control strategy based on distributed control by changing the instantaneous active power input to single module.The strategy can be realized in each inverter respectively and there is no coupling with other inverter units,what s more,additional test of other physical quantities is not necessary.It has the advantages such as high reliability,easy implementation,etc.Simulation and prototype test results show the feasibility and the effectiveness of the strategy.

关 键 词：静止同步补偿器 级联多电平 直流电压均衡 分散控制 

分 类 号：TM761.1[电气工程—电力系统及自动化]