摘要
在分析超高压输电线路三相导线间耦合关系的基础上,该文提出了一种基于暂态量的故障选相方案。该方案算法利用小波变换表征电流故障分量的暂态能量,并通过比较三相间能量的相对大小来识别故障类型和判别故障相别。大量EMTP仿真测试表明,该算法在不同的故障条件下(包括在不同的故障位置、过渡电阻、初始角等)都能基本正确地快速选出故障相,并在一定程度上弥补了基于初始行波的选相方法之不足。动模试验数据也充分验证了故障选相新方案的可行性。
transient-based This paper proposes a novel approach to faulty phase selection （FPS） in EHV transmission systems. This approach stems from analyzing the coupling relation among three phase conductors. The phase selection algorithm first uses the wavelet transform to represent the transient energy of current faulty component in each phase. Then the transient energy magnitudes among three phases are compared to classify the fault type and identify the faulty phase（s）. The performance of this FPS algorithm has been extensively tested through EMTP software. Test results indicate that the new approach can select faulty phases correctly and quickly in case of various fault conditions involving different positions, path resistances, as well as inception angles. To some extent, the new approach can make up for some deficiencies of initial traveling-waves based FPS schemes. Moreover, the dynamic simulation data have fully validated the feasibility of the newly proposed FPS scheme.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2006年第3期1-6,共6页
Proceedings of the CSEE
基金
国家自然科学基金项目(50277027)~~
关键词
电力系统
故障选相
三相电流
暂态量
小波变换
EMTP
动模试验
Power system
Faulty phase selection
Three phase currents
Transients
Wavelet transform
EMTP
Dynamic simulation
