Method for evaluating health state of reactor based on Bayesian theory

A Bayesian theory, health status technology, applied in instruments, measuring devices, character and pattern recognition, etc., can solve the problem of low accuracy

Inactive Publication Date: 2018-12-21
HOHAI UNIV
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Problems solved by technology

Although this method is simple to implement, its accuracy is not high and it is one-sided

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  • Method for evaluating health state of reactor based on Bayesian theory
  • Method for evaluating health state of reactor based on Bayesian theory
  • Method for evaluating health state of reactor based on Bayesian theory

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Embodiment Construction

[0020] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] Such as figure 1 As shown, the present invention provides a reactor health assessment method based on Bayesian theory, including the following steps:

[0022] Step 1. Carry out oil chemical test, dissolved gas analysis test, vibration and noise measurement test on the reactor to obtain the true value of various experimental data;

[0023] Step 2, established figure 2 The shown reactor fault diagnosis model based on Naive Bayesian network;

[0024] Step 3. Select the ascending half ladder model to normalize the real data;

[0025] Step 4. Determine the evaluation index and status level;

[0026] Step 5: Determine the membership functions of different evaluation indicators with respect to different state levels;

[0027] Step 6. Establish an unbiased grey prediction model to evaluate the future state of the reactor;

[0028]...

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Abstract

The invention discloses a method for evaluating a health state of a reactor based on Bayesian theory. The method comprises the following steps: step 1, performing oiling test, dissolved gas analysis test in oil, and vibration noise measurement test on the reactor to obtain true values of obvious types of experimental data; step 2, establishing a reactor fault diagnosis model based on the Na ve Bayesian network; step 3, selecting a rising-half-ladder model to normalize the real values; step 4, determining evaluation indexes and state levels; step 5, determining membership functions of differentevaluation indexes about different state levels; step 6, establishing an unbiased gray prediction model to evaluate the future state of the reactor; and step 7, establishing a comprehensive health state diagnosis model of the reactor based on Bayesian network. The evaluating method can provide technical support for the transition of reactors from periodic preventive maintenance to state maintenance.

Description

Technical field [0001] The invention belongs to the technical field of reactor health diagnosis, and particularly relates to a reactor health diagnosis method based on Bayesian discriminant theory. Background technique [0002] As the main inductive component of the power system, reactors are widely used in current limiting, filtering, reactive power compensation and improving line voltage distribution due to their simple structure, low operation and maintenance cost, and good linearity. Shunt reactor is an indispensable important equipment in high-voltage, long-distance AC transmission network. It can improve the power frequency voltage distribution along the line, enhance system stability and power transmission capacity; reduce power frequency transient overvoltage, and thereby limit operation The amplitude of the voltage; improve the reactive power distribution in the light load line, reduce the active power loss, and improve the power transmission efficiency. Therefore, its o...

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Application Information

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IPC IPC(8): G01D21/02G06K9/62
CPCG01D21/02G06F18/29
Inventor 马宏忠潘信诚田涛朱超杭峰
Owner HOHAI UNIV
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