一种改进型的有源阻尼方法与谐振抑制机理分析  

AN IMPROVED ACTIVE DAMPING METHOD AND HARMONIC SUPPRESSION MECHANISM ANALYSIS

作　　者：吴文进[1,2] 苏建徽 汪海宁[1] 杜燕[1] Wu Wenjin;Su Jianhui;Wang Haining;Du Yan(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China;School of Physics and Electrical Engineering,Anqing Normal University,Anqing 246011,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009 [2]安庆师范大学物理与电气工程学院,安庆246011

出　　处：《太阳能学报》2020年第11期71-78,共8页Acta Energiae Solaris Sinica

基　　金：国家重点研发计划“智能电网技术与装备”重点专项(2017YFB0903503);安徽省自然科学基金(1708085ME132);台达环境与教育基金会《电力电子科教发展计划》重大项目(DREM2015002)。

摘　　要：针对弱电网环境下光伏并网系统容易出现谐振现象,提出一种基于PIR电流控制器的改进型有源阻尼抑制策略,推导出改进型抑制策略下逆变器并网系统受控源等效电路模型;基于该等效模型,运用电路分析理论中的叠加原理分析逆变侧和网侧引起的谐振及其抑制机理,并与常规PI控制策略进行对比,从理论上得出改进型有源阻尼方法对系统谐振抑制的有效性。最后,不同控制策略下的并网仿真实验结果进一步验证所提方法的正确性和有效性。For the resonance phenomenon of photovoltaic grid-connected system on the condition of weak grid environment,this paper proposed a improved active damping suppression strategy based on the PIR current controller.The equivalent controlled source circuit model of the inverter grid-connected system based on the improved inhibition strategy deduced.By the equivalent model,the resonance phenomenon caused by harmonic source from the inverter side and network side and its inhibition mechanism are analyzed respectively using the superposition principle in the theory of circuit.Compared with the conventional PI control strategy,the improved active damping method has the good effectiveness for the harmonic suppression.Finally,the inverter grid-connected simulation results with the different control strategies show that the improved active damping suppression method is the correctness and validity.

关 键 词：光伏发电 等效电路 谐振频率 有源阻尼方法 PIR控制器 

分 类 号：TM614[电气工程—电力系统及自动化]