光伏集群逆变器的谐振机理及抑制技术研究  

Research on Resonance Mechanism and Suppression Technology of Photovoltaic Cluster Inverter

作　　者：万庆祝[1] 张翃帆 张学哲 孙健 WAN Qingzhu;ZHANG Hongfan;ZHANG Xuezhe;SUN Jian(Academy of Electrical and Control Engineering,North China University of Technology,Shijingshan District,Beijing 100144,China;State Grid Beijing Electric Power Company,Customer Service Center,Dongcheng District,Beijing 100062,China;State Grid Beijing Electric Power Company,Electric Power Research Institute,Fengtai District,Beijing 100075,China)

机构地区：[1]北方工业大学电气与控制工程学院,北京市石景山区100144 [2]国网北京市电力公司客户服务中心,北京市东城区100062 [3]国网北京市电力公司电力科学研究院,北京市丰台区100075

出　　处：《电网技术》2018年第10期3377-3384,共8页Power System Technology

基　　金：北京市教委专项基金资助项目(XN097);北京市电力节能协同创新(2011)研究项目(PXM2016_014212_000016)~~

摘　　要：光伏集群式发电能够提高光伏电站的发电效率,但是光伏集群逆变器并网后会产生谐振,影响电力系统安全稳定运行。为了保证电网供电可靠性,研究了光伏集群系统的谐振产生机理,并对谐振特性进行分析,提出了电容电流前馈与逆变器侧电流反馈控制和RC型全局谐振抑制相结合的控制策略,对光伏集群系统进行谐振抑制。通过仿真和实验验证控制方法的有效性,实验结果表明谐振可以被有效抑制,光伏集群系统可以安全稳定地接入电网,保证供电可靠性。Photovoltaic cluster power generation improves power generation efficiency of photovoltaic power plants, but photovoltaic cluster inverter would produce resonance after grid integration, affecting safe and stable operation of power systems. In order to ensure reliability of power supply, resonant generation mechanism of photovoltaic cluster system is studied in this paper, and the resonant characteristics are analyzed. A control strategy combining capacitor current feedforward and inverter-side current feedback with RC type global resonance suppression is proposed, to suppress resonance of photovoltaic cluster system. Effectiveness of the control method is verified with simulation and experiment. Results show that the resonance can be effectively suppressed, and the photovoltaic cluster system can be safely and stably connected to power grid to ensure reliability of power supply.

关 键 词：光伏集群 逆变器 谐振特性 全局谐振抑制 

分 类 号：TM721[电气工程—电力系统及自动化]