Suppression of Zero Sequence Circulating Current for Parallel Three-Phase Grid-Connected Converters Using Hybrid Modulation Strategy

被引：51
作者：
Jiang, Weidong [1 ,2 ]
Ma, Weicheng [1 ,2 ]
Wang, Jinping [1 ,2 ]
Wang, Wei [1 ,2 ]
Zhang, Xuewei [1 ,2 ]
Wang, Lei [1 ,2 ]
机构：
[1] Hefei Univ Technol, Dept Sch Elect Engn & Automat, Hefei 230009, Anhui, Peoples R China
[2] Hefei Univ Technol, Dept Informat Engn, Xuancheng 242000, Peoples R China
来源：
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2018年 / 65卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Grid-connected converter; hybrid pulse width modulation (HPWM); parallel; zero sequence circulating current (ZSCC); SPACE-VECTOR MODULATION; COORDINATE CONTROL; FLUX MINIMIZATION; BOOST RECTIFIERS; SINGLE-PHASE; INVERTERS; PWM; INDUCTOR;
D O I：
10.1109/TIE.2017.2750625
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
The parallel three-phase grid-connected converters sharing dc and ac bus can increase the system power level effectively. However, the zero sequence circulating current (ZSCC) will occur inevitably under space vector pulse width modulation or discontinuous pulse width modulation (DPWM). In this paper, the mechanism and the mathematical model of ZSCC are studied. Then, a hybrid PWM (HPWM) strategy is proposed to suppress the ZSCC based on the same zero sequence voltage injected, which is dependent on the common grid information. The dc voltage utilization of HPWM can be extended compared with sinusoidal PWM (SPWM). The number of parallel modules can be infinity theoretically by using HPWM. It is noted that there is no internal commutation among modules (expect the dq current reference). Finally, the feasibility and the effectiveness of the proposed method are verified by experiments.
引用
收藏
页码：3017 / 3026
页数：10
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