Grid fault positioning method based on wide area voltage

Abstract

The invention relates to a grid fault positioning method based on wide area voltage. The method comprises the steps of firstly extracting fault voltage components of all nodes, then dividing the entire system into a fault area, areas influenced by the fault and areas basically uninfluenced by the fault according to the magnitude of the fault voltage, respectively taking different precaution and alarming measures to the areas according to the degrees of the influence of the fault, preliminarily defining a fault range, performing fault positioning to the fault area by adopting a fault analysis method based on the wide area voltage and finally recording and feeding back fault data for making a preparation for the fault positioning at the next time. The grid fault positioning method based on the wide area voltage has the advantages that the grid fault can be rapidly positioned by adopting the voltage data only and the problem of inconvenience in the processing due to the large data size of a wide area system is solved; the fault can be accurately positioned to a certain section of a line by using the method, favorable conditions are created for troubleshooting the grid fault in time and preventing overload and other problems from causing intertripping, and the accident of large-area power outage is effectively avoided.

Description

technical field [0001] The invention relates to a method capable of timely and accurately locating and removing grid faults and preventing chain trips caused by problems such as overload, and belongs to the technical field of power transmission and distribution. Background technique [0002] In the past 30 years, large power outages have occurred frequently due to improper protection coordination and chain reactions. To solve this problem, the backup protection system of the power grid must be perfected in terms of adaptability and intelligence. In order to alleviate the serious impact of blackouts, the wide-area backup protection system is required to quickly locate and isolate fault areas, reducing or avoiding chain reactions. [0003] Although a lot of research has been done on fault location at home and abroad, due to the large space span of the wide area system itself, the complex topological structure and operation mode, the amount of data in the system has been greatl...

AI Technical Summary

Problems solved by technology

[0003] Although a lot of research has been done on fault location at home and abroad, due to the large space span of the wide area system itself, the complex topological structure and operation mode, the amount of data in the system has been greatly increased, which brings great challenges to data collection and processing. great difficulty

So far, there is no effective method to define the fault area and protect the system at the first time

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