2018 Georgia Tech Protective Relaying Conference

Proceedings »

Paper
View File
pdf
1.2MB
Presentation
View File
pptx
664KB
Biography
View File
pdf
73KB
Paper Summary
View File
pdf
96KB

Considerations and Benefits of Using Five Zones for Distance Protection

This paper discusses application considerations for communications-assisted line protective relays using five distance zones. This discussion includes how modern microprocessor-based relays can benefit the power system when properly applied to pilot protection and backup step-distance schemes. Different problematic scenarios—like mutual coupling, series compensation, long lines with adjacent short lines, current transformer saturation, and the use of coupling-capacitor voltage transformers (CCVTs)—are discussed. The paper analyzes using multiple zones in step-distance and pilot protection schemes such as permissive overreaching transfer trip (POTT), directional comparison unblocking (DCUB), and directional comparison blocking (DCB).

Brian Smyth
Schweitzer Engineering Laboratories, Inc.
United States

Ricardo Abboud
Schweitzer Engineering Laboratories, Inc.
United States

Jordan Bell
Schweitzer Engineering Laboratories, Inc.
United States

 

Powered by OpenConf®
Copyright©2002-2017 Zakon Group LLC