一种三电平逆变器窄脉冲抑制方法  

A Narrow Pulse Suppression Strategy for Three Level Inverters

作　　者：孔志达 郭金川 郝为瀚 KONG Zhi-da;GUO Jin-chuan;HAO Wei-han(China Energy Engineering Group Guangdong Electric Power Design Institute Co.,Ltd.,Guangzhou 100032,China)

机构地区：[1]中国能源建设集团广东省电力设计研究院有限公司,广东广州100032

出　　处：《电力电子技术》2020年第12期81-82,88,共3页Power Electronics

摘　　要：对于三电平调制,在调制波过零和峰值处,存在窄脉冲现象。当前窄脉冲抑制分为非相邻矢量调制和零序电压注入两种。然而非相邻矢量调制会带来谐波含量高、输出电流畸变等问题。零序电压注入会给其他相引入新的窄脉冲问题。这里提出一种新的抑制补偿策略。在消除窄脉冲的同时,避免了三相不对称、电流波形畸变的问题。最终,通过理论分析和实验结果验证了其正确性和有效性。For three level modulation,narrow pulse exists in both the peak and the zero crossing region of the modulation signals.The current narrow pulse elimination methods can be divided into two parts:non-nearest vector modulation method and zero sequence voltage injection method.Whereas,the non-nearest vector modulation method may increase voltage harmonics.The zero sequence voltage injection method may trigger another narrow pulse problem in other phases.A narrow pulse suppression and compensation strategy is proposed to eliminate the narrow pulse and avoid three phase imbalance problem.Finally,the proposed strategy is verified by theoretical analysis and experiment.

关 键 词：逆变器 三电平 调制 窄脉冲 

分 类 号：TM464[电气工程—电器]