RECENT TRENDS REGARDING DISTANCE PROTECTION A REVIEW

Abstract

This paper is structured in six parts and aims to present actual trends regarding distance protection. In the first part is determined the importance of the topic and the requirement of using protections. In the second part is presented the evolution of the protection and automation systems. In part three is presented the distance protection with its past and present, with its principles. In part four are given examples of how the pickup characteristics of the the distance protection have evolved. Part five presents how actual protection functions are implemented and related to the distance protection which functions are new. Part six is dedicated to present the conclusions related to this paper.

Keywords

• protection functions
• distance protection
• tripping characteristic
• impedance
• fault.