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风电场输电线路单相接地故障定位研究 被引量:14

FAULT LOCATION OF SINGLE-PHASE EARTH IN TRANSMISSION LINES OF WIND FARM
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摘要 为改善风电场因输电线路短路故障造成的弃风窝电现象,提出一种基于风电场特性和行波原理的多分支输电线路故障定位方法。利用大型风电场普遍采用接地变压器的特点,得出其故障区间判据;通过推导出一种修正行波波速计算方法(理论上为实际波速),解决了现有行波波速计算的缺陷;采用灰色模型(gray model,GM)提高原始数据采样率降低量化误差,进一步提升行波定位精度。使用PSCAD/EMTDC仿真验证本方法的有效性,可用于风电场输电线路故障定位中。 In order to improve the phenomenon of abandoned wind caused by the transmission line short circuit fault,a fault location method based on wind power farm characteristics and traveling wave principle is proposed. It uses the characteristics of grounding transformer in large-scale wind power farms to obtain the criterion of the fault interval. A new method to calculate traveling wave velocity(theoretically the actual wave velocity)is deduced,which solves the defects of the existing traveling wave velocity calculation. Gray model(GM)is used to improve the sampling rate of the original data to reduce the quantization error and further improve the fault location accuracy. The effectiveness of this method is verified by using PSCAD/EMTDC simulation software and the results show that it can be used in fault location of wind power farm transmission lines.
作者 张科 朱永利 郑艳艳 高佳程 Zhang Ke;Zhu Yongli;Zheng Yanyan;Gao Jiacheng(College of Electrical&Electronic Engineering,North China Electric Power University.,Baoding 071003,China)
出处 《太阳能学报》 EI CAS CSCD 北大核心 2020年第5期114-120,共7页 Acta Energiae Solaris Sinica
基金 国家自然科学基金(51677072) 中央高校基本科研业务费专项(2017XS118)。
关键词 输电线路 故障定位 行波 风电场 单相接地故障 接地变压器 灰色理论 transmission lines fault location traveling wave wind farm single phase-to-earth fault grounding transformer gray theory
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