标题：Zero-Sequence Circulating Current Control Method for Parallel Three-Level T-Type Inverters Using SHEPWM
作者：Zhang, Tongsheng; Xing, Xiangyang; Chen, Alian; Du, Chunshui; Zhang, Chenghui
作者机构：[Zhang, Tongsheng; Xing, Xiangyang; Chen, Alian; Du, Chunshui; Zhang, Chenghui] Shandong Univ, Sch Control Sci & Engn, Jinan, Peoples R China.
会议名称：8th IEEE International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)
会议日期：MAY 22-26, 2016
来源：2016 IEEE 8TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE (IPEMC-ECCE ASIA)
关键词：Selective harmonic elimination pulse-width modulation (SHEPWM); parallel; three-level T-type inverters (3LT(2)Is); zero-sequence circulating; currents (ZSCCs)
摘要：Parallel three-level T-type inverters (3LT(2)Is) can increase the capacity of the distributed generation system. In this situation, the zero-sequence circulating currents (ZSCCs) will occur in the common dc-link voltage of parallel 3LT(2)Is. This paper presents a novel ZSCC reduction method based on the developing selective harmonic elimination pulse-width modulation (SHEPWM) for parallel 3LT(2)Is. And each inverter is made to operate with a different PWM pattern. Compared to the conventional methods, the proposed method can remove about p times the number of harmonics with the same switching frequency. The performance and effectiveness of the proposed method were confirmed by experimental results.