摘要
提出一种逆变器受控源等效电路模型,模型符合系统在谐波电压的激励作用下产生较大谐波电流的串联谐振特点;依托该模型分析逆变器在控制参数(Kcp、Kci)和电网参数(rg、Lg)变化的条件下系统发生谐振的规律,给出准确的谐振点变化范围,为逆变器的参数设计提供理论依据。仿真实验结果表明所提模型及其谐振机理分析方法的有效性。
This paper proposed a inverter controlled source equivalent circuit model. The model has the series resonance characteristics that the system generates large harmonic current under the harmonic voltage stimulating. At the same time the system resonance law is analyzed by the proposed model when the control parameters(Kcp,Kci)and power grid parameters(rg,Lg)changes and accurate resonance point range is given. This provide theoretical basis for the design of inverter parameter. Finally the simulation experimental results show that the proposed model and its resonance mechanism analysis method are effective.
作者
吴文进
苏建徽
汪海宁
杜燕
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 of Anqing Normal University,Anqing 246011,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2020年第1期92-100,共9页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51407057)
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)。
关键词
光伏并网系统
受控源等效模型
谐振机理分析
谐波分布
photovoltaic grid-connected system
controlled source equivalent model
resonance mechanism analysis
harmonic distribution
