Multiagents-based wide area protection with best-effort adaptive strategy

• Published in: International journal of electrical power & energy systems Vol. 31; no. 2; pp. 94 - 99
• Main Authors: Zhu, Yongli, Song, Shaoqun, Wang, Dewen
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.02.2009; Elsevier
• Subjects: Adaptive relay settings; Applied sciences; Connection and protection apparatus; Disturbances. Regulation. Protection; Electrical engineering. Electrical power engineering; Electrical power engineering; Exact sciences and technology; Miscellaneous; Multi-agent systems; Power networks and lines; Wide area protection; Adaptive relay settings; Wide area protection; Multi-agent systems; Performance evaluation; Relay; Adaptive algorithm; Adaptive system; Protective device; Power system stability; Experimental study; Adaptive method; Power system faults; Damage prevention; Circuit breaker; Optical fiber network; Multiagent system; Wide area network; Electrical network; IEC standard; Overcurrent; Electric device
• ISSN: 0142-0615; 1879-3517
• DOI: 10.1016/j.ijepes.2008.10.008

Abstract—Multi-trips of circuit breakers often occur within a short period in a severe blackout, and the tripping usually relates to relays’ mal-operations. In fact, when two ore more electric primary devices are isolated by circuit breakers, the settings of most relays to protect their power system are getting infeasible and uncoordinated. Adaptive settings are needed to prevent them from wrong operation. This paper presents an adaptive protection scheme based on wide area information with best-effort protection strategy, and the outline of multiagents and WAN Based Adaptive Protection System (MAWAPS). In the scheme, the best-effort adaptive strategy is used to guarantee the adaptive settings to operate safely and effectively in most situations. The IP/SDH-based wide area network (WAN) is used to realize real-time wide area information exchange in the proposed protection scheme. Adaptive setting algorithms for the second stage zero-sequence current and phase overcurrent relays are proposed, which can provide larger line coverage than traditional relays. Moreover, multiagent techniques and IEC 61850 are employed to realize the fast communication between different agents, and MMS plays a prominent role in real-time remote communication. A simulating system has been developed according to the above ideas and approaches, and the experimental results show that the proposed adaptive protection scheme is feasible from the view of protective performance including the executing time.