高电压技术2017，Vol.43Issue(3)：923-930,8.DOI:10.13336/j.1003-6520.hve.20170303032
不同热老化程度下油纸绝缘沿面放电发展特性
Evolutionary Characteristics of Surface Discharge Within Oil-paper Insulation Under Different Thermally Aged Conditions
摘要
Abstract
The main aim of this paper is to investigate the evolutionary characteristics of surface discharge within the oil-paper insulation under the different aging conditions and extract parameters which are capable of characterizing the risk of discharge events.Oil-paper specimens of four kinds of different aging intervals are obtained through thermally accelerating aging processes and the developing processes of partial discharge (PD),and pulse sequences are acquired under step-up applied AC voltage.The results show that the current pulses of the surface discharge usually appear in sequence with growing amplitude and the rise/fall time of pluses are faster than the counterparts in gas.The aging conditions of specimens hardly affect the partial discharge inception voltage (PDIV) and breakdown voltage (BDV),however,the parameters P and a are sensitive to the oil/paper conditions.The interval between consecutive discharges,At,is strongly dependent on discharge stage and aging condition of the insulation,and it can be used as the key parameter to the risk assessment of the PD.关键词
油纸绝缘/沿面放电/老化状态/危险性评估/特征量Key words
oil-paper insulation/surface discharge/ageing condition/risk assessment/characteristic quantity引用本文复制引用
李元,张冠军,梁钰,温嘉烨,穆海宝,邓军波..不同热老化程度下油纸绝缘沿面放电发展特性[J].高电压技术,2017,43(3):923-930,8.基金项目
国家自然科学基金(51607139 （）
51521065) （）
中央高校基本科研业务费专项资金(Xjj2016012) （Xjj2016012）
电力设备电气绝缘国家重点实验室资助项目(EIPE17316) （EIPE17316）
中国博士后科学基金资助项目(2016M600793).Project supported by National Natural Science Foundation of China (51607139,51521065),Fundamental Research Funds for the Central Universities (Xjj2016012),State Key Laboratory of Electrical Insulation and Power Equipment (EIPE17316),China Postdoctoral Science Foundation (2016M600793). （2016M600793）
