Distribution Network Fault Diagnosis System and Method Based on Topological Knowledge

Abstract

The invention relates to a distribution network fault diagnosis system and method based on topology knowledge and topology search method. The system includes a resource layer, a knowledge layer and a diagnosis layer. The resource layer includes a fault recorder, a monitoring terminal, and a power distribution equipment ledger. , topology files and databases, monitoring terminals are used to collect switch status information after faults, fault recorders are used to obtain waveforms after faults, topology files are used to provide electrical wiring diagrams of the entire power grid, and power distribution equipment ledgers are used to obtain power distribution The operating condition of the equipment when it fails; the knowledge layer includes a knowledge base that provides information for the diagnosis layer; the diagnosis layer includes a fault diagnosis server, and a fault diagnosis program module is arranged on the fault diagnosis server. This method implements topology knowledge formation and fault diagnosis based on the above system. The system and method can analyze accidents after failures, provide references for operating personnel, save manpower, financial resources, and time, and the system operates efficiently and quickly, and has good use effects.

Description

technical field [0001] The invention relates to the technical field of distribution network fault diagnosis, in particular to a distribution network fault diagnosis system and method based on topology knowledge and a topology search method. Background technique [0002] The traditional distribution network fault diagnosis is based on fault information such as measurement and control, protection, and wave recording, and adopts a certain diagnostic mechanism to determine the fault feeder and fault location, isolate the fault area, minimize the power outage area and shorten the power outage time. The power quality of the power grid is analyzed, excluding the accident analysis function after the failure, such as the analysis of the cause of the accident (human factors, natural factors, equipment failure, etc.), the scope of the accident, and the power outage loss caused by the accident. This requires manual inspection of the accident site, investigation and statistics to give a ...

AI Technical Summary

Problems solved by technology

The traditional power grid topology representation methods include matrix method and adjacency table method, etc. Matrix-based power grid topology analysis method needs to identify the sub-electrical islands formed by the entire distribution network after the circuit breaker and other switching devices trip. Different branch linked lists need to be constructed for each node of the power grid to form a node tree. The entire search process requires three types of data structures in the form of matrix, electrical island, and linked list. The search process is cumbersome and inefficient.

However, the traditional adjacency table method needs to input the node-branch information of the entire power grid when establishing the initial node-branch relationship table and branch-access flag-node relationship table, so the workload is very huge.

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