Power grid fault diagnosis method based on equipment fault probability

Abstract

The invention discloses a power grid fault diagnosis method based on an equipment fault probability. The method comprises the steps: collecting historical operation data of relay protection and circuit breakers through real-time sensing of power equipment, and carrying out statistics of the relay protection and circuit breaker fault probabilities; collecting the number of relay protection and thecircuit breakers and configuration parameters between the relay protection and the circuit breakers from a power grid fault information system; collecting actual action states of the relay protectionand the circuit breakers and a power grid element state from a power grid dispatching automatic control system; constructing a power grid fault diagnosis multi-objective optimization model based on the fault probabilities of the relay protection and the circuit breakers and the acquired data by taking a minimum difference degree and a minimum evaluation risk of an actual action state and an expected action state of the relay protection and the circuit breakers as objectives; linearizing the optimization model to obtain a linear optimization model; and solving the linear optimization model by using a fuzzy optimization method. In the invention, a more accurate and rapid fault diagnosis result is obtained through solving the multi-objective optimization model.

Description

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

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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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