Control Strategy for Single-Phase Unified Power Quality Conditioner of Parallel Converter Based on Specific Order Harmonics Compensation
Meng Linghui1, Shu Zeliang1, 2, Yan Han1, Zhu Weiwei1, Mao Wenjun3
1. School of Electrical Engineering Southwest Jiaotong University Chengdu 610031 China; 2. National Rail Transportation Electrification and Automation Engineering Technology Research Center Chengdu 610031 China; 3. Saic Volkswagen Automotive Company Limited Shanghai 201805 China
Abstract：There is a pulsating power difference between the parallel and series converter of the single-phase unified power quality conditioner (UPQC). The pulsating power generates low-frequency voltage ripple on the dc-link capacitor and affects the compensation performance of the UPQC. This paper analyzes the reasons for the low-frequency voltage ripple of the dc-link and its influence on the compensation performance. In order to suppress the influence on the compensation current, a notch filter is added to the outer voltage loop to reduce the voltage ripple and the harmonic reference current is generated. The specific order harmonic current compensation of the grid is introduced into the inner current loop to further suppress the influence on the modulation signal. Simulation and experiment verify the low-frequency ripple analysis. The proposed control strategy is feasible and effective.
孟令辉, 舒泽亮, 闫晗, 1 sup 毛文君 sup 3 sup. 基于特征次谐波补偿的单相统一电能质量调节器并联变换器控制策略[J]. 电工技术学报, 2020, 35(24): 5125-5133.
Meng Linghui, Shu Zeliang, Yan Han, Zhu Weiwei, Mao Wenjun. Control Strategy for Single-Phase Unified Power Quality Conditioner of Parallel Converter Based on Specific Order Harmonics Compensation. Transactions of China Electrotechnical Society, 2020, 35(24): 5125-5133.
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2020, Vol. 35 
