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Method for successively searching and calculating oil-paper insulation polarization equivalent circuit parameters

An equivalent circuit and oil-paper insulation technology, which is applied in the direction of measuring electricity, measuring electrical variables, complex mathematical operations, etc., can solve problems such as non-convergence, complicated calculation process, and different calculation results, so that there is no random uncertainty , The effect of high accuracy of calculation results

Inactive Publication Date: 2018-04-20
FUZHOU UNIV
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Problems solved by technology

The disadvantage of this optimization algorithm is that: the calculation process is more complicated, and the initial value is randomly generated each time, resulting in different cal

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  • Method for successively searching and calculating oil-paper insulation polarization equivalent circuit parameters
  • Method for successively searching and calculating oil-paper insulation polarization equivalent circuit parameters
  • Method for successively searching and calculating oil-paper insulation polarization equivalent circuit parameters

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Abstract

The invention relates to a method for successively searching and calculating oil-paper insulation polarization equivalent circuit parameters. The method includes the steps of first, determining the number of polarization branches according to measured peak points of depolarization currents through the third-order differential by an oil-paper insulating transformer, and then, solving for polarization branch parameter values Ri, Ci (i=1,2,...,n) successively starting from the peak point at the tail end of a third-order differential spectrum line. The algorithm proposed in the invention eliminates the cumbersome operations required often for solving multivariate nonlinear differential equations by an optimum seeking method during parameter calculations in the prior art, and the method proposed by the invention does not need to solve the multivariate nonlinear differential equations, the calculation process is simple, the calculated results are not random and the accuracy is high.

Description

technical field [0001] The invention relates to a method for sequentially searching and calculating the parameters of the oil-paper insulation polarization equivalent circuit. Background technique [0002] In the aspect of oil-paper insulation aging state diagnosis, the parameter values ​​of polarization equivalent circuit are usually used for evaluation. The current method of solving equivalent circuit parameters is usually to construct a multivariate nonlinear differential equation system, and then apply various intelligent optimization algorithms to search and calculate. The disadvantage of this optimization algorithm is that the calculation process is more complicated, and the initial value is randomly generated each time, resulting in different calculation results each time; in addition, it sometimes falls into local convergence during the iterative process, and even inconsistency occurs. Convergence etc. The algorithm proposed by the invention solves the problems of ...

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Application Information

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IPC IPC(8): G01R31/12G06F17/13
CPCG01R31/1272G06F17/13
Inventor 蔡金锭叶荣
Owner FUZHOU UNIV
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