Statistical Analysis of Insulation Resistance and Dielectric Loss of Transformer Based on Significance Difference

ZHAO Yongjun; LI Xiujing; CHEN Jun; TIAN Xiaohang

doi:10.13296/j.1001-1609.hva.2018.09.019

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Statistical Analysis of Insulation Resistance and Dielectric Loss of Transformer Based on Significance Difference

更新时间：2025-04-26

- Statistical Analysis of Insulation Resistance and Dielectric Loss of Transformer Based on Significance Difference
- High VoltageApparatus Vol. 54, Issue 9, Pages: 123-128(2018)
- 作者机构：
  
  云南电力技术有限责任公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.09.019
  CLC： TM855
- Published：2018
- 稿件说明：
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[1]赵勇军,李秀婧,陈军,田小航.基于显著性差异的变压器绝缘电阻与介损统计分析[J].高压电器,2018,54(09):123-128.

ZHAO Yongjun, LI Xiujing, CHEN Jun, et al. Statistical Analysis of Insulation Resistance and Dielectric Loss of Transformer Based on Significance Difference[J]. High voltageapparatus, 2018, 54(9): 123-128.
[1]赵勇军,李秀婧,陈军,田小航.基于显著性差异的变压器绝缘电阻与介损统计分析[J].高压电器,2018,54(09):123-128. DOI： 10.13296/j.1001-1609.hva.2018.09.019.

ZHAO Yongjun, LI Xiujing, CHEN Jun, et al. Statistical Analysis of Insulation Resistance and Dielectric Loss of Transformer Based on Significance Difference[J]. High voltageapparatus, 2018, 54(9): 123-128. DOI： 10.13296/j.1001-1609.hva.2018.09.019.

摘要

绝缘电阻和介损是变压器预防性试验中最基础的试验项目

是判断变压器整体绝缘状态最常规的手段。然而

由于绝缘电阻测试受现场环境和干扰影响较大

测试数据较为分散

难以给出具体合格标准值

介损也存在判断阈值偏大等问题。基于此

文中利用数理统计方法

统计了云南省相同年份各电厂主变压器绝缘电阻和介损测试数据

并利用SPSS对数据进行了分析

探讨了测试数据分布规律

提出了基于显著性差异的绝缘电阻和介损阈值

旨在为变压器整体绝缘状态的准确判断提供借鉴。

Abstract

The insulation resistance and dielectric loss from transformer preventive test and the conventionalparameters for evaluating overall insulation state of the transformer. However

because the insulation resistance testis affected by the field environment and interference

the test data scatter

so it is difficult to give accurate thresholdvalue. And the obtained threshold value of dielectric loss is a bit larger. Therefore

this paper uses mathematicalstatistics method to calculate the test data of insulation resistance and dielectric loss of the main transformers in allpower plants in Yunnan Province

adopts SPSS to analyze these data

and discusses the distribution law of the testdata. Consequently

the thresholds of the insulation resistance and dielectric loss based on the significant differenceare put forward to provide reference for accurate judgment of the insulation state of a transformer.

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