基于Buck-Boost电路的三电平逆变器

张韬; 赵涛

张韬,赵涛.基于Buck-Boost电路的三电平逆变器[J].电测与仪表,2017,54(19):.
ZHANGTao,zhaotao.Study on Control Technology of Neutral-Point-Voltage Balance for Three Level Inverter[J].Electrical Measurement & Instrumentation,2017,54(19):.

基于Buck-Boost电路的三电平逆变器

Study on Control Technology of Neutral-Point-Voltage Balance for Three Level Inverter

DOI：

中文关键词: 三电平逆变器空间矢量调制中点电压平衡控制策略

英文关键词:Grid-connected inverter SVPWM neutral-point-voltage balance control strategy

基金项目:南京工程学院校级基金项目：YKJ21051

作者中文名	作者英文名	单位
张韬	ZHANGTao	南京工程学院电力工程学院
赵涛	zhaotao	南京工程学院自动化学院

摘要点击次数: 1914

中文摘要:

在研究三电平逆变器时，由于直流侧存在中点电压偏移，导致逆变器交流侧输出波形产生畸变，使逆变器不能满足运行状态要求。为此本文针对二极管箝位式三电平逆变器中点电压不平衡问题，详细分析了三电平逆变器产生中点电压不平衡的原因。并在前人研究的于Buck-Boost电路平衡方法基础上，提出了一种基于该方法的中点电压平衡控制策略，并基于Matlab/Simulink仿真平台对本文提出的平衡控制策略进行了仿真研究，仿真结果表明本文提出的平衡控制策略可有效抑制二极管箝位式三电平并网逆变器中点电压不平衡，且在一些条件下效果比小矢量平衡方法要好。

英文摘要:

In the study of three level inverter, due to the unbalance of neutral-point-voltage, resulting in the output waveform distortion, which made the inverter can not meet the operational requirements. For this, the diode clamped three level inverter causes neutral-point-voltage unbalance is analyzed in this paper, and a control strategy based on the Buck-Boost balance circuit is presented, which is verified by Matlab/Simulink. The simulation results show that the control strategy presented in this paper for the Buck-Boost balance circuit, can effectively suppress the unbalance of neutral-point-voltage, and the effect of conditions in some way better than small vector adjustment by SVPWM.

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