一种中点电位平衡控制和共模电压抑制策略

王克智; 赵文瀚; 王韬; 杨刚; 程国栋; 耿乙文

doi:10.13272/j.issn.1671-251x.2014.09.021

一种中点电位平衡控制和共模电压抑制策略

1.
1．山西潞安环保能源开发股份有限公司，山西长治046204
2.
2．中国矿业大学信息与电气工程学院，江苏徐州221008
3.
中国矿业大学徐海学院，江苏徐州221008

基金项目:

潞安集团科技计划资助项目（2012-环-Y-O3)

详细信息

中图分类号: TD60
计量
- 文章访问数: 79
- HTML全文浏览量: 13
- PDF下载量: 14
出版历程
- 刊出日期: 2014-09-09

A strategy of neutral-point potential balance control and common-mode voltage suppressio

1.
Shanxi Lu''an Environmental Energy Development Co., Ltd., Changzhi 046204, China
2.
School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou 221008, China

摘要

摘要: 针对变频器通过长电缆对电动机供电过程中同时存在共模电压、过电压和中点电位不平衡的问题，分析了共模电压与过电压的产生机理，以及中点电位不平衡对共模电压的影响；提出了一种中点电位平衡控制和共模电压抑制策略，即在传统三电平逆变器基础上增加第四桥臂，通过控制第四桥臂的电流来控制中点电位平衡，通过优化主电路的SVPWM调制策略抑制共模电压。Matlab仿真实验验证了该策略的有效性。
- 变频器 /
- 长电缆输电 /
- 共模电压 /
- 过电压 /
- 中点电位平衡
Abstract: For problems that there are common-mode voltage, over voltage and neutral-point potential imbalance simultaneously in power supply of inverter to motor through long cable, generation mechanisms of common-mode voltage and over voltage were analyzed as well as effect of neutral-point potential imbalance on common-mode voltage. A strategy of neutral-point potential balance control and common-mode voltage suppression was proposed, namely adding the fourth leg to traditional three-level inverter, controlling current of the fourth leg to realize neutral point potential balance and optimizing SVPWM modulation strategy of main circuit to restrain common-mode voltage. Effectiveness of the strategy is verified by Matlab simulation.
- inverter /
- power transmission through long cable /
- common-mode voltage /
- over voltage /
- neutral-point potential balance