Dynamic wide-area cooperative protection: A new approach

Abstract

This paper introduces a new dynamic wide-area cooperative protection based on cooper- ative control of distributed multi-agent systems and graph theoretical methods. For power system cooperative protection, a new voting method is designed that manages each agent’s cooperation according to each protection area. Cooperative protection areas work together and make a wide area of cooperative protection for the specific protection scheme. As the power system configuration varies, the voting management and the wide-area cooperative protection dynamically change. The proposed protection method decisions are collective, while a centralized master does not exist, and local information is used. A fault detection code and a wide-area fault detection code are presented for fault detection. The suggested dynamic wide-area cooperative protection scheme is tested on an IEEE 39-bus test sys- tem. The proposed protection performance is studied as backup protection for distance relays during normal, stable power swings, unstable power swings, and load encroachment conditions.