A Method of Power Grid Fault Diagnosis Based on Equipment Failure Probability

Abstract

The invention discloses a power grid fault diagnosis method based on equipment failure probability, which includes collecting historical operation data of relay protection and circuit breakers through real-time perception of power equipment, and counting the failure probability of relay protection and circuit breakers; collecting data from the power grid fault information system The number of relay protection and circuit breakers and the configuration parameters between them; the actual action status of relay protection and circuit breakers, and the status of grid components are collected from the grid dispatching automatic control system; the actual action status and status of relay protection and circuit breakers The goal is to minimize the difference between the expected action state and the estimated risk, and build a multi-objective optimization model for power grid fault diagnosis based on the failure probability of relay protection and circuit breakers and the collected data; linearize the optimization model to obtain a linear optimization model; use Fuzzy optimization methods solve linear optimization models. The invention obtains more accurate and rapid fault diagnosis results by solving the multi-objective optimization model.

Description

technical field [0001] The invention relates to the field of grid fault diagnosis, in particular to a grid fault diagnosis method based on equipment failure probability. Background technique [0002] With the continuous expansion of the scale of the power grid and the access of distributed energy, the operation and maintenance of the power grid is becoming more and more complicated, which further increases the difficulty of fault diagnosis of the power grid and poses a threat to the safe and stable operation of the power system. Grid status transparency is an important development direction of ubiquitous power Internet of Things, so further research on grid fault diagnosis is urgently needed. [0003] In recent years, people have proposed many methods for fault diagnosis of power grid based on analytical models. However, in the previous methods, after introducing state variables such as malfunction and refusal, the dimension of the variable to be obtained is increased, and t...

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Problems solved by technology

[0004] The main purpose of the present invention is to overcome the deficiencies in the existing power grid fault diagnosis method based on analytical model, and provide a power grid fault diagnosis method based on equipment failure probability to solve the problem of abnormal state of relay protection and circuit breaker in the power grid. The power grid fault diagnosis analysis method solves the difficult and unsatisfactory problems

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