局部电网三相不平衡畸变电流补偿方法  

A Three-Phase Unbalanced Distortion Current Compensation Method for Local Power Grids

作　　者：徐岸非 黄晴宇 沈磊 毛雨阳 席自强[1,2] 方四安 XU Anfei;HUANG Qingyu;SHEN Lei;MAO Yuyang;XI Ziqiang;FANG Sian(Hubei Collaborative Innovation Center for High-Efficiency Utilization of Solar Energy,Hubei University of Technology,Wuhan 430068,Hubei,China;Xiangyang Industrial Institute of Hubei University of Technology,Xiangyang 441100,Hubei,China;Wuhan WOOSTAR Electric Technology Co.,Ltd.,Wuhan 430070,Hubei,China)

机构地区：[1]湖北工业大学太阳能高效利用及储能运行控制湖北省重点实验室,湖北武汉430068 [2]襄阳湖北工业大学产业研究院,湖北襄阳441100 [3]武汉武新电气科技股份有限公司,武汉430070

出　　处：《电网与清洁能源》2022年第10期17-27,共11页Power System and Clean Energy

基　　金：湖北省技术创新专项重大项目(2019AAA018);襄阳湖北工业大学产业研究院重点资助项目(XYYJ2022C11)。

摘　　要：在三相三线制局部低压配电网中,易出现电流畸变和三相不平衡情况,对设备运行及配电网安全造成不利影响。在采用有源电力滤波器(APF)进行谐波与三相不平衡综合补偿时,因传统i_(p)-i_(q)法无法有效消除二倍频分量,故补偿效果不甚理想。该文基于传统i_(p)-i_(q)方法提出了一种改进i_(p)-i_(q)法,得出了低通滤波器参数与APF补偿电流的定量关系,并据此进行了APF主要参数的设计。仿真与实验结果证明采用改进i_(p)-i_(q)法时,谐波与不平衡补偿的效果与低通滤波器的截止频率无关,保持了良好的稳定性,且提高了系统的响应速度。In the three-phase three-wire local low-voltage distribution network,current distortion and three-phase imbalance are prone to occur,which adversely affects the operation of equi_(p)ment and the safety of the distribution network.When using an active power filter(APF)for comprehensive compensation of harmonic and three-phase imbalance,the compensation effect is not good because the traditional i_(p)-i_(q) method cannot effectively eliminate the double frequency component.Based on the traditional i_(p)-i_(q) method,this paper proposes an improved i_(p)-i_(q) method,and the quantitative relationshi_(p) between the low-pass filter parameters and the APF compensation current is obtained,and the main parameters of the APF are designed accordingly.The simulation and experimental results show that when the improved i_(p)-i_(q) method is adopted,the effect of harmonic and unbalance compensation is independent of the cutoff frequency of the lowpass filter,which maintains good stability and improves the response speed of the system.

关 键 词：不平衡 畸变 i_(p)-i_(q)法 有源电力滤波器 

分 类 号：TM734[电气工程—电力系统及自动化]