一种单相无隔离变压器UPQC的控制策略研究  

Control strategy for single-phase transformer-less UPQC system

作　　者：袁帅[1] 陈阿莲[1] 潘羿威 张承慧[1] YUAN Shuai;CHEN A-lian;PAN Yi-wei;ZHANG Cheng-hui(School of Control Science and Engineering,Shandong University,Jinan 250061,China)

机构地区：[1]山东大学控制科学与工程学院,山东济南250061

出　　处：《电工电能新技术》2018年第6期10-17,共8页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金项目(51377101)

摘　　要：本文针对直流母线中点接入交流电网的单相半桥结构无隔离变压器统一电能质量调节器(UPQC)拓扑,分析了其系统功率流动和直流母线工频纹波产生机理,提出了一种改进的串并联协同控制策略。通过解耦控制,使得该拓扑串联侧补偿电压暂降,并联侧补偿电流谐波同时抑制直流母线电压工频脉动。并给出了该拓扑直流母线电容设计选型依据。最后通过仿真和实验,验证了所提设计和控制策略的有效性。This paper analyzes the power flow and DC-link ripple of the single-phase dual-half-bridge UPQC system without transformer. In this paper, an enhanced control method is proposed to restore voltage sag in series and drain sinusoidal current to the grid-side while maintain the DC-link voltage in parallel. The capacitor is selected to satisfy the requirement of the compensation capability and the DC voltage fluctuation. The proposed UPQC configuration is more cost-effective than other UPQC systems with transformer. Experimental results are provided to validate the cor- rectness of the proposed system.

关 键 词：统一电能质量调节器 电压暂降 谐波补偿 无隔离变压器 

分 类 号：TM46[电气工程—电器]