Microprocessor based three step quadrilateral distance relay for the protection of EHV/UHV transmission lines

Author

Gangadharan, G. ; Anbalagan, P.

Author_Institution

Dept. of Electr. & Electron. Eng., PSG Coll. of Technol., Coimbatore, India

Volume

7

Issue

1

fYear

1992

fDate

1/1/1992 12:00:00 AM

Firstpage

91

Lastpage

97

Abstract

The development of a three-zone quadrilateral distance relay for the protection of EHV/UHV transmission lines is discussed. The proposed scheme is based on the Fourier transform method of extracting the fundamental components of voltage and current signals from nonsinusoidal post fault signals. The determination of the quadrilateral characteristic is completed through software. The relay is successfully tested for a number of different three-step quadrilateral characteristics. It is shown that any quadrilateral characteristic can be obtained. Recommendations are made on using 16 bit microprocessors to reduce the operating time and for better accuracy

Keywords

Fourier transforms; microcomputer applications; power system computer control; power system protection; power transmission lines; relay protection; 16 bit microprocessors; EHV; Fourier transform; UHV; current; development; digital control; nonsinusoidal post fault signals; power system protection; software; three step quadrilateral distance relay; transmission lines; voltage; Circuit faults; Fourier transforms; Frequency; Microprocessors; Power system protection; Power transmission lines; Protective relaying; Testing; Voltage; Voltage-controlled oscillators;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.108894

Filename

108894