Computer application in power system protection

Abstract

The author provides an overview of the progress and the future trends of digital computer and microprocessor based hardware and software application in power system protection. It is noted that some of the most difficult aspects of providing the power system protection are reliability, accuracy, security, repeatability, reducing maintenance costs, reducing panel space requirements in control houses, and reducing engineering time to perform analytical studies. Particular attention is given to protection at extremely high voltage levels (230 kV and up). It is concluded that microprocessor-based protection design is a reliable and economical alternative to conventional designs. The protection engineering analysis and design programs are now mostly performed on PC or CAD/CAE (computer-aided design/engineering) computers.<>