三电平并网逆变器共模电压抑制方法研究  

Research on Common-mode Voltage Mitigation of Grid-connected Inverter With Three-level

作　　者：文家燕[1,2] 王付胜[2] 邵章平[2] 

机构地区：[1]广西工学院,广西柳州545006 [2]合肥工业大学,安徽合肥230009

出　　处：《电力电子技术》2012年第1期22-23,57,共3页Power Electronics

基　　金：广西教育厅科研立项项目(201106LX405);广西工学院科学基金(1166203)~~

摘　　要：针对高压大功率三电平并网逆变器应用中产生的共模电压,对其产生机理进行分析,比较常规正弦脉宽调制(SPWM)策略对逆变器共模电压的抑制效果,通过优化开关序列的组合,提出一种新型SPWM策略。该策略有效地将三电平并网逆变器共模电压抑制在一定范围内,明显优于常规SPWM策略,同时兼顾了输出波形的质量。仿真和实验结果证明了新型调制策略的可行性和对共模电压抑制的有效性。Aiming at common-mode voltage existing in the application of grid-connected inverters with high voltage and power three-level, under analyzing and comparing with common sine pulse width modulation （SPWM） strategy of effectiveness to suppress the common-mode voltage of inverter,through optimizing the switching sequence,a novel SPWM strategy is proposed that can confirm the amplitude of common-mode voltage is satisfied with a range and is obviously superior to the former, meanwhile make qualified of the output waveform.Simulation and experiment validate the feasibility and effectiveness of the novel strategy.

关 键 词：并网逆变器 共模电压 正弦脉宽调制 

分 类 号：TM464[电气工程—电器]