Cyber Security Issues for Protective Relays; C1 Working Group Members of Power System Relaying Committee

This report covers issues concerning the security of electronic communication paths to protection relays. It is the goal of this paper to present the reader with some background material and discussions by which they can become more aware of the concerns associated with electronic communications in the power industry.

I. INTRODUCTION

THIS report is focusing on communications with protective relays. However, with the multifunction character of microprocessor relays, these devices might also provide services for, and therefore will be accessed by, other groups in the power utility. In addition to the relays themselves, devices used to access relays such as substation computers, switches, routers as well as Local Area Network security are discussed.