电力系统自动化2018，Vol.42Issue(10)：114-121,8.DOI:10.7500/AEPS20170706009
适用于半波长输电线路的快速方向纵联保护方法
Fast Directional Pilot Protection Method for Half-wavelength Transmission Lines
李斌 1郭子煊 1姚斌 1王兴国2
作者信息
- 1. 智能电网教育部重点实验室(天津大学),天津市300072
- 2. 中国电力科学研究院有限公司,北京市100192
- 折叠
摘要
Abstract
Directional power components based on fundamental frequency components and sequence components can identify the positive-direction faults and anti-faults of traditional transmission lines by taking advantages of line backside impedance. However,due to the long refraction and reflection time of wave processes in half-wavelength lines,the directional components cannot determine quickly and accurately the anti-faults after protection startup.Thus,a new fault-component based directional protection method for half-wavelength lines is proposed.In this method,the special amplitude phase relationship of phase-to-phase deviation between super-imposed fundamental frequency components of voltage and current is utilized at the initial stage of the anti-fault,and then the waveform identification coefficient at each end of lines is calculated respectively.At the same time,the super-imposed fundamental frequency components and negative-sequence components are used as the auxiliary criterion to judge the positive-direction faults,which constitute the fast directional protection scheme of the semi-wavelength transmission lines together with the proposed new method.In this scheme,the fast action logic based on the waveform identification coefficient and the fast recognition of the anti-fault is adopted to realize the fast action of the zone faults.Finally, the simulation results by PSCAD/EMTDC show that the method can accurately identify the positive-direction faults and anti-faults to achieve the fast tripping of half-wavelength lines.关键词
半波长交流输电/继电保护/工频故障分量/方向元件Key words
half-wavelength AC transmission/relay protection/fundamental-frequency fault component/directional component引用本文复制引用
李斌,郭子煊,姚斌,王兴国..适用于半波长输电线路的快速方向纵联保护方法[J].电力系统自动化,2018,42(10):114-121,8.
