油纸绝缘老化评估的Davidson-Cole模型参数提取方法

针对目前变压器油纸绝缘老化状态评估中的纸板聚合度测定破坏性取样、介电响应法测量没有定量判据等问题,提出一种基于Davidson-Cole模型的现场绝缘老化状态定量评估方法。首先仿真研究Davidson-Cole模型参数提取方法,借助现场测量的去极化电流数据,计算出油纸绝缘等值电路参数与频域复介电常数,并利用所得数据绘制Davidson-Cole图,采用多变量最小二乘拟合方法得出松弛时间、介电常数变化量等Davidson-Cole模型参量。实验研究了油纸绝缘不同老化程度的Davidson-Cole模型,采用非线性拟合方法对其老化状态进行Davidson-Cole模型参量提取并分析参数变化,研究结...

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Bibliographic Details
Published in电机与控制学报 Vol. 21; no. 3; pp. 63 - 70
Main Author 刘骥 尹梦涵 李秀婧 池明赫 黄玲
Format Journal Article
LanguageChinese
Published 哈尔滨理工大学 电介质工程国家重点实验室培育基地,黑龙江 哈尔滨,150080%云南电力技术有限责任公司,云南 昆明,650217 2017
Subjects
Davidson-Cole模型
介电响应
油纸绝缘
绝缘评估
频域介电谱
频域介电谱
介电响应
Davidson-Cole模型
dielectric response
oil-paper insulation
insulation assessment
油纸绝缘
frequency domain dielectric spectroscopy
Davidson-Cole model
绝缘评估
Online AccessGet full text
ISSN1007-449X
DOI10.15938/j.emc.2017.03.009

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Summary:针对目前变压器油纸绝缘老化状态评估中的纸板聚合度测定破坏性取样、介电响应法测量没有定量判据等问题,提出一种基于Davidson-Cole模型的现场绝缘老化状态定量评估方法。首先仿真研究Davidson-Cole模型参数提取方法,借助现场测量的去极化电流数据,计算出油纸绝缘等值电路参数与频域复介电常数,并利用所得数据绘制Davidson-Cole图,采用多变量最小二乘拟合方法得出松弛时间、介电常数变化量等Davidson-Cole模型参量。实验研究了油纸绝缘不同老化程度的Davidson-Cole模型,采用非线性拟合方法对其老化状态进行Davidson-Cole模型参量提取并分析参数变化,研究结果表明,模型参数与老化程度有直接关系,仿真结果与实验结果一致,对变压器油纸绝缘老化状态评估有参考价值。
Bibliography:oil-paper insulation ; insulation assessment ; dielectric response ; frequency domain dielectricspectroscopy ; Davidson-Cole model
23-1408/TM
LIU Ji1, YIN Meng-han1, LI Xiu-jing2, CHI Ming-he1, HUANG Ling1 （ 1. State Key Laboratory Breeding Base of Dielectrics Engineering, Harbin University of Science and Technology, Harbin 150080, China; 2. Yunnan Electric Power Technology CO. LTD. ,Kunming 650217, China）
Aiming at problems of destructive sampling for measuring polymerization degree of insulating board, non-quantitative criterion for dielectric response measurement in present aging assessment of trans- former oil-paper insulation, a quantitative on-site insulation assessment method was proposed on the basis of Davidson-Cole model. The extraction method of Davidson-Cole model parameters was studied. Using the on-site testing data of depolarization current, equivalent circuit parameters and frequency domain complex permittivity of oil-paper insulation were calculated, and Davidson-Cole graphs was plotted. The Dav
ISSN:1007-449X
DOI:10.15938/j.emc.2017.03.009