A RELIABLE DIGITAL DIRECTIONAL RELAY BASED ON COMPENSATED VOLTAGE COMPARISON FOR EHV TRANSMISSION-LINES

被引：5

作者：

XIA, YQ ^{[1
]}

HE, JL ^{[1
]}

LI, KK ^{[1
]}

机构：

[1] TIANJIN UNIV,DEPT ELECT POWER & AUTOMAT ENGN,TIANJIN,PEOPLES R CHINA

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 1992年 / 7卷 / 04期

关键词：

D O I：

10.1109/61.156999

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A digital directional relay based on compensated voltage comparison has been implemented with a 16-bit microcontroller. This paper describes the digital implementation of the phase-angle comparators which make use of fundamental frequency components of the compensated voltages. A simple hybrid hardware structure and intelligent software routines have been developed in consideration of high reliability. Using adaptive sampling interval, the relay can maintain its overall performance even for faults that occur during power frequency disturbances. Dynamic tests on a 500kV, 290km transmission line analogue model confirm that the relay can provide correct operation for various faults during different operating conditions of the protected line.

引用

页码：1955 / 1962

页数：8

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