Anti-disturbance current transformer transformation ratio abnormity identification method and system

By establishing an energy conservation matrix and introducing anti-perturbation parameters in the current transformer variation detection, and solving the variation ratio using a differentiated creative search algorithm, the problems of decreasing the detection accuracy of variable ratios and fluctuations in the existing technology are solved, and a more stable and high-precision variation ratio detection is achieved.

CN119644233AActive Publication Date: 2025-03-18STATE GRID SICHUAN ELECTRIC POWER CO MARKETING SERVICE CENT
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Patent Information

Application Number
CN202510176353.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-18
Publication Date
2025-03-18
Estimated Expiration
2045-02-18

AI Technical Summary

Technical Problem

When detecting the current transformer ratio, the prior art is susceptible to noise or numerical errors, resulting in a decrease in accuracy, and fluctuations in line loss make the ratio evaluation difficult.

Method used

By establishing the energy conservation matrix of the target line and introducing anti-perturbation parameters into the matrix, an objective function based on the energy conservation matrix is ​​built, and a differentiated creative search algorithm is used to solve the variable ratio of the current transformer to improve the stability of the variable ratio solution.

Benefits of technology

It effectively reduces the accuracy drop due to noise or numerical error, improves the solution stability of the current transformer ratio, and quickly locates the abnormal current transformer.

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Abstract

The invention relates to the technical field of online monitoring of electric energy metering equipment, in particular to an anti-disturbance current transformer transformation ratio anomaly identification method and system, and the method comprises the following steps: obtaining line loss in a target line and electric energy increment corresponding to an energy supply transformer and an energy consumption transformer; establishing an energy conservation matrix by using line loss and electric energy increment, introducing anti-disturbance parameters into the energy conservation matrix to establish a target function, and solving the target function by using a differentiation creative search algorithm to obtain a transformation ratio of a current transformer corresponding to the energy supply transformer and a current transformer corresponding to the energy consumption transformer; and obtaining archive transformation ratios of the current transformers corresponding to the energy supply transformer and the energy consumption transformer, respectively calculating difference values between the transformation ratios and the corresponding archive transformation ratios, and carrying out transformation ratio abnormity identification on the current transformers based on a difference value calculation result. According to the method, the stability of transformation ratio solving can be effectively improved while rapid positioning of the abnormal current transformer is achieved, and precision reduction caused by noise or numerical errors is reduced.
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