Debye Parameter Identification Method of Oil-paper Insulation Based on Depolarization Current Prony Algorithm Fitting

GAO Hao; LIU Qingzhen; CAI Jinding

doi:10.13296/j.1001-1609.hva.2020.11.032

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Debye Parameter Identification Method of Oil-paper Insulation Based on Depolarization Current Prony Algorithm Fitting

更新时间：2025-04-26

- Debye Parameter Identification Method of Oil-paper Insulation Based on Depolarization Current Prony Algorithm Fitting
- High VoltageApparatus Vol. 56, Issue 11, Pages: 210-218(2020)
- 作者机构：
  
  福州大学电气工程与自动化学院福建省新能源发电与电能变换重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.11.032
  CLC： TM855
- Published：2020
- 稿件说明：
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[1]高浩,刘庆珍,蔡金锭.基于去极化电流Prony拟合的油纸绝缘德拜参数辨识方法[J].高压电器,2020,56(11):210-218.

GAO Hao, LIU Qingzhen, CAI Jinding. Debye Parameter Identification Method of Oil-paper Insulation Based on Depolarization Current Prony Algorithm Fitting[J]. High voltageapparatus, 2020, 56(11): 210-218.
[1]高浩,刘庆珍,蔡金锭.基于去极化电流Prony拟合的油纸绝缘德拜参数辨识方法[J].高压电器,2020,56(11):210-218. DOI： 10.13296/j.1001-1609.hva.2020.11.032.

GAO Hao, LIU Qingzhen, CAI Jinding. Debye Parameter Identification Method of Oil-paper Insulation Based on Depolarization Current Prony Algorithm Fitting[J]. High voltageapparatus, 2020, 56(11): 210-218. DOI： 10.13296/j.1001-1609.hva.2020.11.032.

摘要

提出一种利用自适应采样间隔Prony算法对去极化电流数据进行拟合

进而辨识出徳拜等效电路参数的方法。根据扩展德拜等效模型下去极化电流指数函数叠加的物理性质

对传统单采样间隔Prony算法进行改进:根据不同大小时间常数去极化电流子谱线的衰减特性实现采样间隔的自适应选择

利用自适应采样间隔对去极化电流数据进行多次Prony拟合

得到相应时间常数的子谱线弛豫参数

进而辨识出油纸绝缘的徳拜电路参数;搭建扩展徳拜模型仿真平台得到PDC仿真数据进行拟合

验证了自适应采样间隔Prony算法对徳拜电路参数辨识的准确性

取一台现场实测的油纸绝缘调压器去极化电流数据进行拟合

拟合结果与实测电流吻合

验证了此方法在现场噪声干扰测试条件下的可靠性;对实测数据的拟合结果证实了扩展徳拜模型对油纸绝缘介质响应过程描述的准确性

徳拜拟合对现场实测的噪声干扰起到了滤波的作用。

Abstract

An adaptive sampling interval Prony algorithm is proposed to fit the data of depolarization current and identify the parameters of Debye equivalent circuit.According to the physical properties of the exponential function superposition of the depolarized current under the extended Debye equivalent model

the traditional single sampling interval Prony algorithm is improved:the adaptive selection of sampling interval is realized according to the attenuation characteristics of depolarized current sublines with different time constants

and the data of depolarized current are obtained by using the adaptive sampling interval.Prony fitting is used to obtain the subspectral relaxation parameters of the corresponding time constants

and then identify the parameters of the oil-paper insulation circuit.The simulation platform of extended Dubai model is built to simulate the PDC simulation data

which verifies the accuracy of the adaptive sampling interval Prony algorithm for parameter identification of the Dubai circuit

and a field is selected.The fitting results of the measured depolarization current data of oil-paper insulated voltage regulator coincide with the measured current

which verifies the reliability of the method under the condition of field noise interference test.The fitting results of the measured data confirm the accuracy of the extended Debye model in describing the response process of oil-paper insulated medium.The noise interference measured in the field plays a filtering role.

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