Network topology adaptive method of differential protection parameters in smart distribution network

Abstract

The invention provides an adaptive method of a network topology for differential protection parameters of a smart power distribution network. The adaptive method of the network topology for the differential protection parameters of the smart power distribution network comprises the specific methods and steps of (1) detecting a network topology change of the power distribution network; (2) analyzing protection equipment affected by the network topology change; (3) forming a differential protection network topology parameter configuration file; (4) quitting a differential protection function of the corresponding protection equipment; (5) issuing a network topology parameter configuration file; (6) inputting the differential protection function of the corresponding protection equipment; and (7) forming a network topology parameter configuration file updating log. The adaptive method of the network topology has the beneficial effects that (1) the characteristics of a distributed power supply can be fully described and various applications comprising the distributed power supply are supported; and (2) the influence on an existing power distribution automation system is the smallest and maturely used application software in an existing medium-voltage power distribution network does not need to be modified.

Description

technical field [0001] The invention belongs to the technical field of electric power engineering, and relates to a network topology self-adaptive method suitable for differential protection parameters of an intelligent distribution network. Background technique [0002] With the development of smart distribution network technology, it is an inherent requirement for intelligent self-healing of distribution network to realize accurate location and isolation of faults in distribution network. The line current differential protection has a simple principle, uses less electricity, has a clear protection range and does not need step-by-step adjustment and coordination, has fast action speed and high reliability, and can adapt to the precise location of faults in multi-terminal power lines. Therefore, the application of current differential protection on the basis of the existing distribution network primary equipment, combined with actual needs to achieve accurate positioning, fa...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: for the traditional line current differential application in the distribution network, due to the frequent changes of the distribution network model, the line differential parameter modification, large debugging workload, and long working hours are provided. Intelligent distribution network differential protection parameter network topology self-adaption method, using this method can not only realize the automatic modification of line differential parameters after network topology change, to adapt to the changed network topology, reduce the workload of manual maintenance and adjustment, but also Minimal impact on existing distribution automation systems, distribution network terminals and protection equipment

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