高压电器2017，Vol.53Issue(11)：152-158,7.DOI:10.13296/j.1001-1609.hva.2017.11.025
基于回复电压法的变压器绝缘纸水分及绝缘状态研究
Research on Moisture Content and Insulation State of Oil-paper for Transformer Based on Return Voltage Measurement
尹小兵 1郝长金 2黎成林 1曹保江 1高波 1吴广宁1
作者信息
- 1. 西南交通大学电气工程学院,成都610031
- 2. 四川电力设计咨询有限责任公司,成都610041
- 折叠
摘要
Abstract
To accurately diagnose oil-paper aging state of transformer insulation and detect moisture content of the oil-paper,the return voltage curves of oil-paper samples with different degree of polymerization(Dp)and moisture content were measured.The results show that:1)when the insulating oil-paper is in a state of low moisture content(0.5％≤Mp＜3％),four parameters of the return voltage change quickly with moisture content,and when the oilpaper has high mois-ture content (3％ ≤Mp≤5％),the four parameters almost keep stable;2)The maximum value and initial slope of the return voltage curve increase with moisture content of oil-paper,while the central time constant and half-life time decrease following negative exponential law;and 3)the variation amplitudes of the four parameters with moisture show a linear relationship with the Dp,and the expression of RVM parameters with Mp and Dp are fitted.The half-hfe time of return voltage curve shows a significant relationship with moisture content and insulation state of oil-paper,so it can be adopted to evaluate the moisture content and Dp of the oil-paper.关键词
油纸绝缘/回复电压/回复电压半衰期/水分含量/聚合度Key words
oil-paper insulation/return voltage/return voltage half-life time/moisture content/degree of polymerization引用本文复制引用
尹小兵,郝长金,黎成林,曹保江,高波,吴广宁..基于回复电压法的变压器绝缘纸水分及绝缘状态研究[J].高压电器,2017,53(11):152-158,7.
