| 引用本文: | 唐振东,杨洪耕.基于模态分析的风电场并网谐波谐振研究[J].电力自动化设备,2017,37(3): |
| TANG Zhendong,YANG Honggeng.Harmonic resonance research based on modal analysis for grid-connected wind farms[J].Electric Power Automation Equipment,2017,37(3): |
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| 摘要: |
| 针对风电场并网时易发生的谐波谐振问题，采用模态分析法对风电场并网系统的节点导纳矩阵进行解耦处理，并通过特征值分解确定其谐振频率、谐振中心等相关信息。首先建立并网LCL逆变器等效诺顿模型和电网等效模型，基于已建立模型，采用模态分析法分析风电场并网谐振现象并给出各节点谐振参与因子、谐振中心等谐振信息。基于仿真平台PSCAD按照某99 MW风电场参数搭建实例仿真模型，在验证模态分析法可行性的同时，深入研究随着风电场集电线路长度和风机并网台数改变时的并网谐振各节点参与因子与谐振中心的变化规律。 |
| 关键词: 风电场 并网逆变器 谐波谐振 模态分析 参与因子 |
| DOI：10.16081/j.issn.1006-6047.2017.03.015 |
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| Harmonic resonance research based on modal analysis for grid-connected wind farms |
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TANG Zhendong, YANG Honggeng
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School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, China
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| Abstract: |
| Aiming at the harmonic resonance easily occurred during the grid-connection of wind farm, the modal analysis is applied to decouple the nodal admittance matrix of grid-connected system and the eigenvalue decomposition is adopted to determine the related information, such as resonant frequency, resonant centre, etc. The equivalent Norton model of grid-connected LCL inverter and the equivalent grid model are established, based on which, the resonance phenomenon of grid-connected wind farm is researched by the modal analysis and the resonant information of each node is determined, such as resonant participation factor, resonant center, etc. A simulation model based on PSCAD is built for an actual 99 MW wind farm and the variation laws of nodal resonant participation factor and resonant center versus the tieline length and the grid-connected generator quantity are studied, verifying the feasibility of the modal analysis applied. |
| Key words: wind farms grid-connected inverter harmonic resonance modal analysis participation factor |
