中国电机工程学报2026，Vol.46Issue(8)：3274-3284,中插17,12.DOI:10.13334/j.0258-8013.pcsee.242740
基于异频差动的变速抽蓄机组转子绕组短路故障保护方法
Rotor Winding Short-circuit Fault Protection Method of Variable Speed Pumped Storage Unit Based on Different Frequency Differential
摘要
Abstract
Short circuit fault of rotor winding is a common fault type of variable speed pumped storage unit.However,the short-circuit fault protection in engineering usually relies on the integrated over-current protection of AC excitation system,which has low sensitivity to reflect the short-circuit fault of rotor winding.It is difficult to meet the safe operation requirements of the unit.Inspired by transformer differential protection,a different frequency differential protection method using both stator and rotor phase currents is proposed in this paper.In terms of working principle and structure,the stator and rotor windings of the variable speed pumped storage unit are similar to the high and low voltage side windings of the transformer.This shows that the conditions for differential protection exist.Furthermore,the characteristic variation law of the stator and rotor side current of the variable speed pumped storage unit before and after the rotor winding short circuit fault is analyzed by Clark transformation.On this basis,the criterion form of different frequency differential protection based on the characteristic component comprehensive effective value is constructed.The proposed protection method is simple in principle and easy to implement.Finally,the effectiveness of the proposed method is verified by dynamic simulation experiments.关键词
变速抽蓄机组/异频差动保护/转子绕组短路故障/特征分量综合有效值Key words
variable speed pumped storage unit/different frequency current differential protection/rotor winding short-circuit fault/characteristic component comprehensive effective value分类
信息技术与安全科学引用本文复制引用
乔健,余浩源,王义凯,尹昕,徐天乐,王凯,季遥遥..基于异频差动的变速抽蓄机组转子绕组短路故障保护方法[J].中国电机工程学报,2026,46(8):3274-3284,中插17,12.基金项目
国家自然科学基金项目(52407100).Project Supported by National Natural Science Foundation of China(52407100). （52407100）
