| 引用本文: | 郑嘉龙,杨 鸽,陈开宇,张慧珍,孙 章.LCL型多逆变器并网系统谐振研究综述[J].电力系统保护与控制,2022,50(21):177-187.[点击复制] |
| ZHENG Jialong,YANG Ge,CHEN Kaiyu1,ZHANG Huizhen,SUN Zhang.An overview on resonance for a multiple LCL-type inverter grid-connected system[J].Power System Protection and Control,2022,50(21):177-187[点击复制] |
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| 摘要: |
| 多逆变器并网系统谐振将威胁电网的稳定运行。由于具备较好滤波效果，LCL型滤波器常被作为并网逆变器的输出滤波器。鉴于近年来又有很多LCL型多逆变器并网系统谐振机理分析和抑制方法被提出，有必要进一步梳理和总结。首先，介绍了多逆变器并网发电系统电路拓扑及等效电路。然后，梳理了频域分析法、模态分析法和多输入多输出模型分析法的基本概念及其在系统谐振机理分析中取得的新成果。接着，重点介绍了有源阻尼法、阻抗重塑法和采用有源阻尼器在系统谐振抑制方面的优点和局限性，揭示了虚拟电阻和陷波器的应用是上述方法的关键技术。同时，还分析了分层控制、控制器参数优化以及系统配置优化在系统谐振抑制方面的应用。最后，从新型电力系统建设趋势的角度，认为多逆变器并网系统正朝着大规模、多参数和不同控制方法并用的复杂系统方向发展，需要多种分析方法相结合才能准确分析其谐振机理。对于多逆变器并网谐振的抑制方法而言，传统有源阻尼法、阻抗重塑法和有源阻尼器将得到进一步深入研究，谐振在线监测技术或将成为该研究新的突破口。 |
| 关键词: 多逆变器并网 LCL滤波器 谐振 机理分析 有源阻尼 阻抗重塑法 有源阻尼器 在线监测 |
| DOI：DOI: 10.19783/j.cnki.pspc.220002 |
| 投稿时间：2022-01-01修订日期：2022-02-27 |
| 基金项目:四川省科技厅重点研发项目资助(2022YFG0117)；四川省水利厅科技计划项目资助(川水科202003)；四川水利职业技术学院院级重点科研项目资助(KY2021-01) |
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| An overview on resonance for a multiple LCL-type inverter grid-connected system |
| ZHENG Jialong,YANG Ge,CHEN Kaiyu1,ZHANG Huizhen,SUN Zhang |
| (1. School of Electric Power Engineering, Sichuan Water Conservancy College, Chongzhou 611231, China;
2. School of Electrical Engineering and Electronic Information, Xihua University, Chengdu 610039, China) |
| Abstract: |
| The resonance of a multi inverter grid-connected system will threaten the stable operation of a power grid. Because of its good filtering effect, an LCL filter is often used as the output filter of a grid-connected inverter. In recent years, many resonance mechanism analysis and suppression methods of the LCL multi inverter grid-connected system have been proposed, and analysis and summarizing are needed. First, the circuit topology and equivalent circuit of a multi inverter grid-connected power generation system are introduced. Second, the basic concepts of the frequency domain analysis, modal analysis and multi input multi output model analysis methods, and their new achievements in the analysis of system resonance mechanism are explored. Then, the advantages and limitations of active damping and impedance reshaped methods and an active damper in system resonance suppression are emphasized. It is revealed that the application of virtual resistance and a notch filter is the key technology of the above methods. Also the applications of hierarchical control, controller parameter optimization and system configuration optimization in system resonance suppression are also analyzed. Finally, from the perspective of the construction trend of the new type power system, the development of a multi inverter grid-connected system towards complex systems with large-scale, multi parameter and different control methods is considered. It needs a combination of multiple analysis methods to accurately analyze the resonance mechanism. For the suppression methods of multi inverter grid connected resonance, the traditional active damping and impedance reshaped methods and the active damper will be further studied, and on-line resonance monitoring technology may become a new breakthrough in this research.
This work is supported by the Key Research and Development Program of Sichuan Science and Technology Department (No. 2022YFG0117). |
| Key words: multi-inverter grid-connected LCL filter resonance mechanism analysis active damping impedance reshaped method active damper online monitoring |
