Microgrid wide-area current protecting system and method based on multi-Agent technology

Abstract

A microgrid wide-area current protecting system and method based on the multi-Agent technology belongs to the technical field of microgrid protection. The system is composed of an intelligent electronic equipment layer, an area control and protection coordinating layer and a central processing layer, wherein the intelligent electronic equipment layer is composed of intelligent electronic devices (IED) configured on every breaker in a microgrid, and every IED comprises a state monitoring Agent, a measuring Agent, an network topology Agent and a protecting Agent; the area control and protection coordinating layer comprises an area control Agent and a protection coordinating Agent; the central processing layer comprises a central processing Agent. According to the microgrid wide-area current protecting system and method based on the multi-Agent technology, the microgrid current protecting range is divided through an improved taboo fusion breadth searching algorithm, gives full play to the advantage of a taboo algorithm capable of eliminating local optimization, makes full use of the advantages of wide search range and high efficiency of a breadth search algorithm and overcomes refusal operation and maloperation of the IEDs through a method of enlarging the current protecting range, thereby being capable of accurately and rapidly cutting off faults inside the microgrid.

Description

Technical field [0001] The invention belongs to the technical field of micro-grid protection, in particular to a micro-grid wide-area current protection system and method based on multi-Agent technology. Background technique [0002] The microgrid provides effective technical means for the full application of distributed power by constructing a miniature low-voltage power distribution system composed of a series of distributed power (DG), energy storage systems and loads. At the same time, the relatively complex electrical characteristics inside the microgrid: the direction of the internal flow of the microgrid is not fixed, and there are two operating modes of the microgrid: grid-connected and isolated. The bidirectional power flow characteristics of the microgrid make it difficult to achieve the selectivity of microgrid protection; grid-connected operation and island operation are faced with a large difference in short-circuit fault current. In addition, the "plug and pla...

AI Technical Summary

Problems solved by technology

However, the research on these microgrid protection methods is limited to a specific microgrid structure model, which is not extensive, and for wide-area current protection, the range of receiving fault information is not as large as possible. The reasons are as follows: First, relay protection The rapidity requirements make it insufficient time to receive and process a wide range of fault information; second, the

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