短路故障清除时刻直驱风电机组机端暂态过电压研究

田颢璟; 孙大卫; 刘辉; 王倩; 邢楚铭

doi:10.19912/j.0254-0096.tynxb.2021-0836

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太阳能学报 ›› 2023, Vol. 44 ›› Issue (1) : 247-256. DOI: 10.19912/j.0254-0096.tynxb.2021-0836

短路故障清除时刻直驱风电机组机端暂态过电压研究

田颢璟^1,2, 孙大卫², 刘辉², 王倩¹, 邢楚铭¹

作者信息 +

RESEARCH ON TRANSIENT OVERVOLTAGE OF PMSG TERMINAL AT FAULT CLEARING TIME

Tian Haojing^1,2, Sun Dawei², Liu Hui², Wang Qian¹, Xing Chuming¹

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文章历史 +

摘要

大规模风电汇集地区的配套火电机组少,属于交流弱电网,故障后暂态过电压问题严重。2011年至今,中国西北、东北、华北等多个区域电网已经发生了数十起风电暂态过电压脱网事件,且事故中,故障恢复过电压引发脱网的风力机占比很高,其过电压程度直接影响风电场的开机容量。针对该问题,该文基于典型低电压穿越策略建立永磁直驱风电机组（PMSG）并网模型,研究弱电网条件下送出线路短路故障清除时刻PMSG机端暂态过电压的影响因素。结果表明,PMSG暂态过电压与风电机组容量、电压跌落程度及锁相环动态特性等因素有关,根据某实际直驱风场搭建仿真系统模型验证了该结论。

Abstract

The large-scale wind power convergence area has few supporting thermal power units, which belongs to AC weak power grid, and the transient overvoltage problem after fault is serious. Since 2011, dozens of wind power transient overvoltage disconnection events have occurred in northwest, and northeast, worth China and other regional power grids. In the accidents, the proportion of wind turbines off grid caused by fault recovery overvoltage is very high, and the degree of overvoltage directly affects the starting capacity of wind farms. In order to solve this problem, a grid connected model of permanent magnet synchronous generator（PMSG） is established based on typical low voltage ride through （LVRT） strategy, and the influencing factors of transient overvoltage at PMSG terminal at the time of clearing short circuit fault of transmission line are studied under the condition of weak current network. The results show that the transient overvoltage of PMSG is related to the capacity of wind turbines, the degree of voltage drop and the dynamic characteristics of phase locked loop（PLL） The simulation system model is built according to a real direct drive wind field to verify the conclusion.

导出引用

田颢璟, 孙大卫, 刘辉, 王倩, 邢楚铭. 短路故障清除时刻直驱风电机组机端暂态过电压研究[J]. 太阳能学报. 2023, 44(1): 247-256 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0836

Tian Haojing, Sun Dawei, Liu Hui, Wang Qian, Xing Chuming. RESEARCH ON TRANSIENT OVERVOLTAGE OF PMSG TERMINAL AT FAULT CLEARING TIME[J]. Acta Energiae Solaris Sinica. 2023, 44(1): 247-256 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0836

中图分类号： TK513.5

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