摘要
基于统计分析原理，采用数字仿真技术，对线路发生故障时电压、电流信号中的非基频噪声特性进行了分析。考察了噪声分量的基本组成，不同故障类型条件下噪声分量的变化特点以及噪声分量与稳态分量的相对关系等问题。根据距离保护的特点，对在各类相间故障时的故障相电压、电流对的噪声特性进行了研究，为从整体上了解噪声分量对保护工作性能的影响，优化保护滤波算法设计以及合理选择保护定值提供了重要依据。
he Characteristic of the transient noise induced by the rault on the EHV transmissionline is studied with the simulation technique. Emphasis is placed on an investigation of thedifference between the current and voltage transient noise signals,the effect of fault type onthe noise characteristic and the relationship between the noise components and the steady-state component. The noise characteristic of the composite fault signals involved inimpedance relaying is also discussed.Results show that different filters and settings shouldbe adopted in protective relays for different types of fault so as to give optimal relaying per-formance.
出处
《华中理工大学学报》
CSCD
北大核心
1995年第10期8-12,共5页
Journal of Huazhong University of Science and Technology
关键词
电力系统
故障
噪声特性
输电线路
超高压
electric power system
simulation of fault transient signal
analysis of noise Characteristic
