High-voltage circuit breaker fault diagnosis method based on decision tree algorithm

A high-voltage circuit breaker and fault diagnosis technology, applied in the fields of instruments, calculations, computer parts, etc., can solve the problems of difficulty in determining the degree of fault membership, increase the deviation, and it is difficult to build an accurate mathematical model of the fault system, so as to avoid maintenance, The effect of preventing power grid accidents and saving manpower and material resources

Pending Publication Date: 2021-02-05
DALIAN POWER SUPPLY COMPANY STATE GRID LIAONING ELECTRIC POWER +1
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Problems solved by technology

The fault estimation method based on signal mode is suitable for the input and output of the diagnosed system can be measured, but there are too many human factors, and it is difficult to determine the fault memb

Method used

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  • High-voltage circuit breaker fault diagnosis method based on decision tree algorithm
  • High-voltage circuit breaker fault diagnosis method based on decision tree algorithm
  • High-voltage circuit breaker fault diagnosis method based on decision tree algorithm

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Embodiment

[0044] The analytical model-based method is suitable for establishing a relatively accurate mathematical model system, so the present invention proposes a high-voltage circuit breaker fault diagnosis method based on a decision tree algorithm, such as image 3 , 4 , shown in 5, its steps include:

[0045] S1: Input the high-voltage circuit breaker characteristic data set and the expected target variable, the characteristic data set is n sets of data D=(X 1 ,y 1 ), (X 2 ,y 2 ),..., (X n ,y n ), where each set of feature data X i There are m eigenvectors A, y i for X i expected target variable;

[0046] S2: Divide the high-voltage circuit breaker feature data set into a training data set D according to the ratio [0.7, 0.3] t with the test dataset D e ;

[0047] S3: Set the characteristic data of the high voltage circuit breaker X i All eigenvectors A of

[0048] S4: Calculate the information gain ratio g of all eigenvectors A from the root node R (Dt , A), the info...

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Abstract

The invention discloses a high-voltage circuit breaker fault diagnosis method based on a decision-making tree algorithm, and the method comprises the steps: feature selection: selecting feature vectors with classification capability for training data, wherein the feature vectors comprise four groups of feature vectors: a main contact stroke, a switching-on overtravel, action time and switching-onand switching-off synchronism; generating a decision tree, calculating an information gain ratio of the feature vectors in the training data set, judging whether the information gain ratio is maximumor not, selecting the feature vector with the maximum information gain ratio as a test condition of a decision node, and generating a complete decision tree according to a C4.5 algorithm; pruning thedecision-making tree, and pruning the decision-making tree according to the loss function of the minimized decision-making tree. Maintenance can be arranged in a targeted mode, unnecessary maintenancecan be effectively avoided, manpower and material resources are saved, and meanwhile power grid accidents caused by the fact that latent faults continue to be developed into dominant faults can be prevented.

Description

technical field [0001] The invention relates to the field of electrical control and protection, in particular to a high-voltage circuit breaker fault diagnosis method based on a decision tree algorithm. Background technique [0002] As the most important control and protection equipment in the power system, the high-voltage circuit breaker has a high probability of failure due to its complex structure and relatively frequent actions. If it fails, it will not be able to control and protect the safe and stable operation of the entire power system, resulting in huge economic losses. At present, the methods of detecting high-voltage circuit breakers include regular inspection and post-event inspection. Regular inspection is time-consuming, laborious, and blind. Regardless of whether the circuit breaker is faulty or not, it will seriously affect the service life of the equipment, because most of the equipment It does not need to be disassembled or repaired, and its performance w...

Claims

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Application Information

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IPC IPC(8): G06K9/62
CPCG06F18/214G06F18/24323
Inventor 吕洋王宝昌孙伟冯川李昂崔伟峰王元洲彭振利李君秋于岩
Owner DALIAN POWER SUPPLY COMPANY STATE GRID LIAONING ELECTRIC POWER
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