Survey Results for Current Specifications and Operations of Protection Relays in Japan and Trends in Overseas Technology

Abstract

Investigating R&D committee on “Survey results for the current specification and operation of protection relays in Japan, and trends in overseas technology” started in December, 2012 and published the technical report after 2 years activities. This technical report describes the results of a systematic survey particular to the protection relays used by each power utility in Japan written in accordance with the following outline;  (1) Specification of a typical protection relay system  (2) Basic concept of power system configurations including the protection relay and its operation  (3) Specification of overseas protection relay systems and trends in relevant standards  (4) Analysis of the differences between domestic and overseas protection relay technology  (5) Future direction of protection relay technology