极端负荷下并联有源滤波器谐波补偿方法  

Harmonic Compensation Method of Shunt Active Power Filter Under Extreme Load

作　　者：杨正东[1] 施浩波 YANG Zhengdong;SHI Haobo(Jinan Power Supply Compangy,Jinan 250001,Shandong,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]济南供电公司,山东济南250001 [2]中国电力科学研究院有限公司,北京100192

出　　处：《电气传动》2022年第12期27-31,80,共6页Electric Drive

基　　金：中国电力科学研究院科学技术项目(SGFJDK00DWJS2000375)。

摘　　要：对畸变电流信号的无静差追踪不能通过单一的PI控制完成,为提升电网电流质量,提出极端负荷下并联有源滤波器谐波补偿方法。创建极端负荷下三相四线制系统中并联有源滤波器的主电路拓扑结构,获得需补偿的畸变电流。建立基于SAPF控制与PI控制的复合控制系统,以畸变电流信号的基波周期特性为依据,重复控制误差信号,以提高追踪信号的稳定性与精准性。在此基础上,融入固定次数无静差控制技术,实现并联有源滤波器谐波补偿。搭建三相四线制系统平台进行实验,结果表明,该方法可降低电流畸变率,改善电流波形的正弦度,具有优越的动态性能与稳态性能。The tracking of the distorted current signal without static error cannot be completed by a single PI control.In order to improve the quality of the grid current,a harmonic compensation method for parallel active filters under extreme loads was proposed.Create the main circuit topology of the parallel active filter in the three-phase four wire system under extreme load to obtain the distortion current to be compensated.Establish a composite control system based on SAPF control and PI control.Based on the fundamental period characteristics of the distorted current signal,the error signal was repeatedly controlled to improve the stability and accuracy of the tracking signal.On this basis,a fixed-order no static error control technology was incorporated to realize harmonic compensation of parallel active filters.A three-phase four-wire system platform was built for experiments.The results show that the method can reduce the current distortion rate,improve the sine of the current waveform,and has superior dynamic performance and steady-state performance.

关 键 词：极端负荷 并联有源滤波器 谐波补偿 畸变电流 复合控制 

分 类 号：TM72[电气工程—电力系统及自动化]