Adaptive Over-Current Relay Coordination Based on Multi-Agent System : A Case Study on Transmission Line Outage

Abstract

This paper presents a conceptual design of multiagent for adaptive over-current relay coordination. In some temporary circumstances e.g. line outage, connecting a new or existing generator, etc., may lead to mal-operation of precoordinated protective devices in power systems. The set of protective relays must be enhanced with ability of adaptation in such a way that their parameter setting is adjusted. The multi-agent system proposed here is to develop optimal relay coordination adaptively according to environment changes. In this paper, Java Agent Development (JADE) software package was used for implementing the proposed multi-agent system. The communication process and data transfer can be simulated and monitored by using the sniffer agent GUI that helps us to confirm the use of multi-agent systems for an application of adaptive relay coordination. The 6-bus test power system was used for test. The results showed that the use of the multi-agent system is very useful in adaptive overcurrent relay coordination.

Relay Protection Based on Multi-Agent System

“…In terms of scheme based on multi-agent system, if short-circuit fault takes place somewhere in the system, the agents along the fault-disrupted line immediately start to detect the features of the fault, afterwards, multiple criteria agents carry out various parameter measurements, and a final rational action scheme will come out after the consultation among individual agent in the environment. Multi-agent system will send the information of 'refusal of circuit breaker action' by remote communication and trigger the immediate action of the breaker at upper level to cut off the fault as soon as possible, lessen the action time and improve reliability [6]. The conventional and multi-agent system-based modules are shown in Fig.…”

Research on Realization of Over-Current Protection Based on Multi-Agent Strategy

“…Under the above-mentioned circumstance, MAS-based strategy will send the "circuit-breaker action refusal" information by remote communication and trigger the immediate movement of the breaker at upper level as soon as possible. In this way, the action time is lessened and the reliable operation of the system is assured [4] [5].…”