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

doi:10.19595/j.cnki.1000-6753.tces.191397

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摘要单相统一电能质量调节器（UPQC）并联侧和串联侧变换器之间存在脉动的功率差,脉动的功率在直流电容上产生低频电压纹波并影响变换器的补偿效果。该文分析单相UPQC中并联侧变换器直流母线低频纹波产生的原因以及对补偿效果的影响。为了抑制对补偿电流的影响,在电压外环加入陷波器减少电压纹波产生谐波参考电流,在电流内环引入网侧电流特征次谐波补偿,进一步抑制电压纹波对调制信号的影响。仿真和实验验证了对低频纹波分析的正确性,以及所提控制策略抑制直流纹波影响的可行性和有效性。

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关键词 ：单相统一电能质量调节器, 低频电压纹波, 纹波电压影响抑制, 特征次谐波补偿

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.

Key words： Single-phase unified power quality conditioner (UPQC) low-frequency voltage ripple voltage ripple influence suppress specific order harmonics compensation

收稿日期: 2019-10-23

PACS:

TM714.2

基金资助:国家轨道交通电气化与自动化工程技术研究中心（NEEC-2019-A04）和四川省科技厅重点研发（2018GZ0066）资助项目。

通讯作者: 舒泽亮男,1979年生,教授,博士生导师,主要研究电力电子技术及应用,包括多电平变换装置、电力电子变压器、同相供电系统及电力电子应用中的数字信号处理技术等。E-mail: shuzeliang@swjtu.edu.cn

作者简介: 孟令辉男,1992年生,博士研究生,研究方向为电力电子变换器控制与调制策略。E-mail: mlh_menglinghui@163.com

引用本文:

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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