单相直流电力电子负载的并网多环控制策略研究  

Research on grid⁃connected multiloop control strategy for single⁃phase DC power electronic load

作　　者：范文超[1] 廖冬初[1,2] 蔡华锋[1,2] 周浩 FAN Wenchao;LIAO Dongchu;CAI Huafeng;ZHOU Hao(School of Electrical and Electronic Engineering,Hubei University of Technology,Wuhan 430068,China;Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]湖北工业大学电气与电子工程学院,湖北武汉430068 [2]湖北工业大学太阳能高效利用湖北省协同创新中心,湖北武汉430068

出　　处：《现代电子技术》2021年第5期103-108,共6页Modern Electronics Technique

基　　金：国家自然科学基金(61473116);太阳能高效利用及储能运行控制湖北省重点实验室2017年度开放研究基金(HBSKFZD2017008)。

摘　　要：针对能馈型电力电子负载中LCL型并网逆变器谐振特性以及弱电网下电网电压畸变所导致的并网电流中低频谐波问题,建立了并网逆变器的等效控制模型。分析了并网电流谐波产生机理,在电流控制器中引入比例多谐振控制及参数设计方法,并加入电网电压全前馈控制和电容电流反馈控制,与电压外环一起构成多环控制系统。最后在Matlab/Simulink软件下搭建70 kW单相直流能馈型电力电子负载整体仿真模型,仿真结果表明,该方案能有效抑制并网电流中低频次谐波,改善了并网电流质量,提高了整个电力电子负载的运行效率。In view of the resonant characteristics of LCL⁃type grid⁃connected inverter and the grid⁃connected current low⁃frequency harmonic caused by voltage distortion in weak grid existing in energy feedback power electronic load,an equivalent control model of grid⁃connected inverter is established,and the generation mechanism of grid⁃connected current harmonic is analyzed.The proportional multi⁃resonance control and parameter design method are introduced into the current controller,and the power grid voltage full feedforward control and capacitive current feedback control are added to form the multi⁃loop control system together with the voltage outer loop.An overall simulation model of 70 kW single⁃phase DC energy feedback power electronic load is established in the Matlab/Simulink environment.The simulation results indicate that the strategy can effectively suppress the low⁃frequency harmonic,and improve the quality of grid⁃connected current and the operation efficiency of the whole power electronic load.

关 键 词：电力电子负载 等效控制模型 并网逆变器 电压全前馈控制 多环控制 仿真模型 

分 类 号：TN876-34[电子电信—信息与通信工程]