Improving Relay Performance by Off-line and On-line Evaluation
نویسندگان
چکیده
Protective relays are designed to quickly and correctly clear the fault and minimize the impact of disturbances on power system. Occasionally, some complex conditions may cause relays to perform unintended or incorrect operation, which may further deteriorate the system condition and even jeopardize the stability of the entire system. This paper discusses three categories of solutions for analyzing the relay operation behavior, evaluating and improving the relay performance: 1) relay performance evaluation based on relay testing; 2) field evaluation of relay operation based on advanced fault analysis; 3) automated analysis of relay operation based on expert system. Applications using each solution for the relay performance evaluation are presented to demonstrate the benefits.
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