A three‐vector‐based direct power control strategy for three‐phase voltage source PWM converters. (13th November 2016)

• Record Type: Journal Article
• Authors: Wang, Meng; Shi, Yanyan; Qi, Mingyan; Shen, Minghui
• Is Part Of: International journal of circuit theory and applications. Volume 45:Number 8(2017:Aug.)
• Page Start: 1151
• Page End: 1168
• Publication Date: 2016-11-13
• Subjects: PWM converters -- control strategy -- three vectors -- direct power control; Electric circuit analysis -- Periodicals; 621.319205
• DOI: 10.1002/cta.2290
• Languages: English
• ISSNs: 0098-9886

Abstract

Summary: For traditional direct power control strategy, there exist high steady‐state power ripples and large current harmonics. To solve this problem, this work proposes a novel three‐vector‐based direct power control strategy for three‐phase voltage source pulse‐width‐modulated (PWM) converters. Different from traditional predictive direct power control strategy, an improved vector table is presented and three voltage vectors are selected, which considers the impact of voltage vectors on the active and reactive power simultaneously. The performance of the three‐phase voltage source PWM converters with the proposed control strategy is investigated and compared with the predictive deadbeat direct power control strategy. Furthermore, the three‐phase voltage source PWM converters have also been tested in the condition of different loads and when voltage unbalance occurs. Simulation and experimental work are conducted. The results conclude that the proposed strategy is of simple structure and fast dynamic response. Besides, it can effectively reduce steady‐state power ripples and current harmonics, improving the performance of the three‐phase PWM converters. Copyright © 2016 John Wiley & Sons, Ltd. Abstract : Key findings A three‐vector‐based direct power control strategy is presented for three‐phase voltage source PWM converters without increasing complexity of the system. Two non‐zero vectors and a zero vector are selected for the control of the instantaneous active and reactive power in each sampling cycle. The simulation and experimental results indicate that the proposed control strategy is of high dynamic performance and can effectively reduce current harmonics, active power, and reactive power fluctuations.