摘要
双馈风机故障暂态特性与传统同步发电机不同,其短路电流成分复杂,导致基于工频相量的距离元件动作性能劣化。为了解决工频相量距离保护在双馈风电场送出线中应用时存在的问题,提出了一种基于波形相关分析的时域距离保护方案。分析了波形相似度的原理及时间窗选取的依据,通过仿真验证了所选时间窗的合理性。基于此分析,构造了时域距离保护判据,并在PSCAD/EMTDC仿真平台上搭建模型进行了测试。仿真结果表明,在不同故障类型下,所提出的时域距离保护基本不受双馈风机故障特性的影响,具有较好的动作性能。
The fault transient characteristics of a Doubly Fed Induction Generator(DFIG)are different from traditional synchronous generators.The short-circuit current components of the former are complex.They may lead to the deterioration of the operating performance of the distance protection based on the power frequency phasor.To solve the problems of power frequency phasor based distance protection being applied in the transmission lines of double-fed wind farms,a time-domain distance protection based on waveform correlation analysis is proposed.The principle of waveform similarity and the standard of time window selection are analyzed.The rationality of the selected time window is verified by simulation.Then,the time-domain distance protection criterion is constructed.A simulation model is built and tested using the PSCAD/EMTDC platform.The simulation results show that the proposed time-domain distance protection is basically unaffected by DFIG fault characteristics and has good performance under different types of faults.
作者
张太升
韩伟
杨霖
田宝江
陈玉
段文岩
姚孟
文明浩
ZHANG Taisheng;HAN Wei;YANG Lin;TIAN Baojiang;CHEN Yu;DUAN Wenyan;YAO Meng;WEN Minghao(State Grid Henan Electric Power Dispatching Control Center,Zhengzhou 450052,China;Jiaozuo Power Supply Company,State Grid Henan Electric Power Company,Jiaozuo 454003,China;State Grid Henan Electric Power Research Institute,Zhengzhou 450052,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《电力系统保护与控制》
CSCD
北大核心
2021年第14期82-88,共7页
Power System Protection and Control
基金
国家自然科学基金项目资助(51877090)。
关键词
双馈风机
波形相似度
工频相量距离保护
时域距离保护
PRONY算法
doubly fed induction generator
waveform similarity
power frequency phasor based distance protection
time-domain distance protection
Prony method
