Paper oil insulation extension Debye model parameter identification method based on FDS

Abstract

The invention discloses a paper oil insulation extension Debye model parameter identification method based on a FDS. The method comprises the following steps: 1, performing frequency domain dielectricspectrum testing on a to-be-tested oil-immersed insulation sample to acquire a real part measured value and an imaginary part measured value of a complex capacitor; 2, establishing model equivalent complex capacitor real part C' and virtual C" expressions according to the extension Debye model so as to obtain a real part fitted value and an imaginary part fitted value of the complex capacitor; 3,establishing an identification target function of the extension Debye model parameter; and 4, performing iterative solution on the identification target function of the extension Debye model parameter by using an algorithm of combining a particle swarm algorithm with the least square method, thereby obtaining the final solution of the extension Debye model parameter. The invention puts forward amethod of constructing a paper oil insulation extension Debye model based on the frequency domain dielectric response technology FDS curve, so that the problems that the method of acquiring the equivalent model parameter by using the time domain dielectric response in the existing paper oil insulation equivalent model research is insufficient in reliability, and a time domain export model is bad in matching degree with the frequency domain dielectric spectrum and bad in stability can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of electrical equipment insulation aging prediction, in particular to an FDS-based method for identifying parameters of an extended Debye model for oil-paper insulation. Background technique [0002] Oil-paper composite insulation structure is the main insulation component of oil-paper insulation equipment, including oil-immersed transformers, oil-paper capacitor bushings and oil-immersed current transformers. The deterioration of its insulation performance will directly affect the operation reliability of oil-paper insulation equipment. Accurate and effective evaluation of the state information of oil-paper composite insulation is the key to ensure the safe and stable operation of oil-paper insulation equipment. [0003] At present, dielectric response technology is widely used in the evaluation of oil-paper insulation state, which mainly includes recovery voltage method (Recovery Voltage Method, RVM), pola...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art. It provides a parameter identification method for the extended Debye model of oil-paper insulation based on FDS. It proposes to build the extended Debye model of oil-paper insulation based on the FDS curve of the frequency domain dielectric response technology, which can effectively Solve the problem of insufficient reliability of obtaining equivalent model parameters by using time-domain dielectric response in the current oil-paper insulation equivalent model research, and poor matching and stability of the time-domain derived model to the frequency-domain dielectric spectrum

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