Micro-grid wide-area current protection system and method based on multi-agent technology

Abstract

A micro-grid wide-area current protection system and method based on multi-Agent technology belong to the technical field of micro-grid protection. The system is divided into intelligent electronic equipment layer, regional control and protection coordination layer and central processing layer; the intelligent electronic equipment layer is composed of intelligent electronic equipment IEDs configured on each circuit breaker in the microgrid; each IED includes: a state monitoring agent , Measurement Agent, Network Topology Agent and Protection Agent; the regional control and protection coordination layer includes: regional control Agent and protection coordination Agent; the central processing layer includes the central processing Agent; the present invention adopts the improved fusion taboo breadth search algorithm to protect the micro-grid current. The range is divided, giving full play to the advantage of the tabu algorithm to get rid of local optimization, and also making full use of the advantages of the breadth search algorithm, which has a wide search range and high efficiency. Correctly and quickly remove faults inside the microgrid.

Description

[0001] Technical field [0002] 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 [0003] 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 ...

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 fault disturbance only affects a limited local area, and the fault information in this range is crucial to fault judgment, while the information outside the fault is not. It is too important, so how to divide the scope of protection is a problem that needs further research

And there is also the problem of how the IED associated with the intelligent electronic device (IED) acts when it refuses to move or malfunctions

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