| 引用本文: | 刘其辉,董楚然,于一鸣.双馈风电并网系统高频谐振机理及抑制策略[J].电力自动化设备,2020,40(9): |
| LIU Qihui,DONG Churan,YU Yiming.High frequency resonance mechanism and suppression strategy of doubly-fed wind power grid-connected system[J].Electric Power Automation Equipment,2020,40(9): |
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| 摘要: |
| 双馈风电机组并网时，由于机网相互作用可能会发生高频谐振，造成巨大的经济损失。针对该问题，首先，综合考虑机侧变流器和网侧变流器的影响，建立双馈风电机组的阻抗模型，并考虑风机接入电网时所采用的不同补偿方式建立双馈风电并网系统阻抗模型，通过绘制和分析阻抗频率响应曲线，揭示双馈风电并网系统高频谐振的产生机理；然后，借鉴光伏逆变器高频谐振抑制的思想，在机侧变流器和网侧变流器原有控制策略中附加阻尼控制环节进行阻抗重塑，以实现风电并网系统高频谐振的有效抑制；最后，通过仿真验证了所提策略的合理性与有效性。 |
| 关键词: 双馈风电机组 阻抗建模 高频谐振 谐振抑制 变流器 |
| DOI：10.16081/j.epae.202007018 |
| 分类号:TM614;TM46 |
| 基金项目:国家重点研发计划项目(2018YFB0904000,2018-YFB0904003)；国家电网公司科技项目(SGJB0000TKJS1801242) |
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| High frequency resonance mechanism and suppression strategy of doubly-fed wind power grid-connected system |
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LIU Qihui1, DONG Churan1, YU Yiming2
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1.State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China;2.Jinan Power Supply Company, State Grid Shandong Power Grid Co.,Ltd.,Jinan 250012, China
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| Abstract: |
| The high frequency resonance as DFIG(Doubly-Fed Induction Generator) integrated into the power grid can result in huge economic losses. To deal with this issue, firstly, the impact of both machine-side and grid-side converters is considered. The impedance model of DFIG is established, and the impedance model of the doubly-fed wind power grid-connected system is developed, in which the different compensation types are considered. By plotting and analyzing the curve of impedance frequency response, the mechanism of high-frequency resonance for the doubly-fed wind power grid-connected system is revealed. Subsequently, the additional damping control is introduced to both machine-side and grid-side converters by impedance reshaping, which utilizes the suppression strategy of high frequency resonance of photovoltaic inverters. Finally, the rationality and effectiveness of the suppression strategy are verified by simulation. |
| Key words: doubly-fed induction generator impedance modeling high frequency resonance resonance suppression electric converters |
