Need for Reliability Assessment of Special Protection System

Abstract

Special Protection System (SPS) are designed to detect one or more predetermined system conditions which causes power system disturbances and for those conditions it has to take some preplanned remedial actions. The failure of this system to identify the defined condition or its failure to take the predefined remedial action, could lead to very serious and costly consequences. In order to increase the transfer capability of the power network SPS is widely used since it assist the system operators in administering fast corrective actions. The purpose of this paper is to clarify the need of developing a systematic and comprehensive reliability framework for SPS. Different reliability assessment methods are discussed, and effort to deal with a similar problem in power system industry is summarized.