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Frequency domain spectrum identification method considering parameters of oil-paper insulation interface polarization equivalent circuit

An equivalent circuit and interface polarization technology, applied in the field of frequency domain spectrum identification, can solve problems such as complex derivation formulas, heavy calculation workload, and interference of test data, and achieve accurate and reliable calculation results, accurate parameter calculation results, and no external interference. small effect

Active Publication Date: 2019-01-04
FUZHOU UNIV
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Problems solved by technology

The existing oil-paper insulation equivalent circuit parameter identification method is mainly based on the extended Debye equivalent model and the test data of the time-domain dielectric response method to identify the parameters, but the derivation formula of the solution process is generally more complicated, and the calculation workload is also large ; At the same time, the test data based on the time domain dielectric response method is usually disturbed by the electromagnetic environment and other factors

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  • Frequency domain spectrum identification method considering parameters of oil-paper insulation interface polarization equivalent circuit
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  • Frequency domain spectrum identification method considering parameters of oil-paper insulation interface polarization equivalent circuit

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Embodiment Construction

[0025] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0026] The invention provides a frequency-domain spectrum identification method considering the equivalent circuit parameters of the oil-paper insulation interface polarization, which is realized according to the following steps:

[0027] Step S1: First, carry out on-site frequency-domain dielectric spectrum testing on the oil-paper insulation equipment, and obtain different frequency-domain spectrum test data, such as complex capacitance C* and dielectric loss factor tanδ, etc.

[0028] Step S2: Based on the extended Debye equivalent model, consider the interface polarization of oil-paper insulation, introduce the interface polarization branch, and establish the equivalent circuit considering the interface polarization of oil-paper insulation; figure 1 As shown in the equivalent circuit, consider the relationship between the oil-paper in...

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Abstract

The invention relates to a frequency domain spectrum identification method considering the parameters of an oil-paper insulation interface polarization equivalent circuit. Oil-paper interface polarization is considered based on an extended Debye equivalent model, and an interface polarization branch is introduced. A multivariate equation set for calculating the parameters of circuit components isconstructed according to a circuit model and frequency domain dielectric spectrum test parameters; and the parameter values of all components in the equivalent circuit can be identified by establishing an objective function for solving the equation set and using an artificial intelligence algorithm. The frequency domain spectrum identification method considering the parameters of an oil-paper insulation interface polarization equivalent circuit presented by the invention has the advantages of simple operation process and accurate and reliable parameter calculation result.

Description

technical field [0001] The invention relates to a frequency domain spectrum identification method considering the polarization equivalent circuit parameters of the oil-paper insulation interface. Background technique [0002] At present, equivalent circuit parameters are widely used in the evaluation of oil-paper insulation conditions. The existing oil-paper insulation equivalent circuit parameter identification method is mainly based on the extended Debye equivalent model and the test data of the time-domain dielectric response method to identify the parameters, but the derivation formula of the solution process is generally more complicated, and the calculation workload is also large ; At the same time, the test data based on the time-domain dielectric response method is usually disturbed by the electromagnetic environment and other factors. In contrast, the frequency domain dielectric response method has the advantages of strong anti-interference ability and measurement ...

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Application Information

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IPC IPC(8): G01R23/16G01R31/12G01R27/26
CPCG01R23/16G01R27/2617G01R31/1263
Inventor 蔡金锭叶荣
Owner FUZHOU UNIV
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