Effect of transmission line loading on the performance characteristics of polyphase distance relay elements

1988 ◽  
Vol 3 (4) ◽  
pp. 1466-1474 ◽  
Author(s):  
R.J. Marttila
Keyword(s):  
Transmission Line ◽  
Performance Characteristics ◽  
Distance Relay

scholarly journals Suggestion of a New Protection Scheme for a Transmission System Equipped with a Thyristor-Controlled Series Capacitor

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2250
Author(s):  
Minh-Chau Dinh ◽  
Minh-Quan Tran ◽  
Jae-In Lee ◽  
Seok-Ju Lee ◽  
Chur Hee Lee ◽  
...  
Keyword(s):  
Transmission Line ◽  
Power Flow ◽  
Operation Mode ◽  
System Stability ◽  
Test Bed ◽  
Distance Relay ◽  
Protection Scheme ◽  
Thyristor Controlled Series Capacitor ◽  
Real Time Digital Simulator ◽  
Series Capacitor

A thyristor-controlled series capacitor (TCSC) is employed to a transmission line in order to enhance the usable capacity of the present as well as upgraded lines, improve system stability, reduce losses, and improve power flow control capability. However, in an abnormal situation, the TCSC may transit from the existing operation mode to the other mode according to its control system and protection strategy. There is much difference in the impedance of the TCSC between each mode. This threatens the reliability of the conventional protection system, especially the distance relay, that works based on the measurement of line impedance. In this paper, we suggest a new protection scheme for a distance relay of a transmission line equipped with a TCSC. In the suggested method, in order to mitigate the effect of the TCSC in the fault loop, the TCSC injected voltage is subtracted from the measured phase voltage before supplying the voltage signal to the distance relay. The suggested scheme was verified by a real time digital simulator (RTDS)-based closed-loop test bed of a protective relay. The effect of the TCSC in the fault loop was completely mitigated. The distance relay works properly with the suggested scheme.

Visualising the Response of Distance Relays in the Series Compensated Transmission System - Understanding the Problems and some Practical Solutions.

2012 ◽  
Vol 13 (1) ◽  
Author(s):  
Abhishek Khanna
Keyword(s):  
Transmission Line ◽  
Transmission System ◽  
Distance Relay ◽  
Series Compensation ◽  
Novel Methods ◽  
Distance Relays ◽  
Direction Determining

This paper discusses problems and the possible solutions for protecting series compensated transmission line with distance relays. The paper also takes into consideration the influence of the series compensation on the distance relays installed on the short lines adjacent to the compensated line. Starting from visualising the response of the distance relays, the paper proposes some simple but novel methods to secure and improve the distance relay response. The methods include new impedance and direction determining techniques, placement of CVT and setting considerations. The material presented in this paper is based on the authors experience in protecting series compensated lines with distance relays.

scholarly journals Application of ANFIS for Distance Relay Protection in Transmission Line

2015 ◽  
Vol 5 (6) ◽  
pp. 1311 ◽  
Author(s):  
Azriyenni Azriyenni ◽  
Mohd Wazir Mustafa
Keyword(s):  
Power Systems ◽  
Transmission Line ◽  
Electric Power ◽  
Relay Protection ◽  
Electric Power Systems ◽  
Power Delivery ◽  
Alternative Solution ◽  
Distance Relay ◽  
Channel Spacing ◽  
Line Identification

The techniques hybrid intelligent was introduced in transmission protection that usage in electric power systems. There was applied ANFIS for distance relay protection particularly for transmission line. If a fault occurs during the transmission line identification caused by unwanted fault thus the power delivery to the consumer becomes not going well. Therefore, it would need to provide an alternative solution to fix this problem. The objective of this paper uses impedance transmission line to determine how long the channel spacing will be protected by distance relay. It has been distance relays when fault occurs in transmission line with the application Sugeno ANFIS. The simulation shows it excellent testing results can be contributed to an alternate algorithm that it has good performance to protecting system in transmission line. This application used by using software Matlab.

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