电工技术学报  2018, Vol. 33 Issue (7): 1626-1633    DOI: 10.19595/j.cnki.1000-6753.tces.170106
高电压与绝缘 |
纤维素颗粒物对变压器击击穿特性影响的试验研究
赵涛1, 律方成1,2, 刘云鹏1,2, 程祥瑞1, 汪佛池1
1. 华北电力大学河北省输变电设备安全防御重点实验室保定 071003;
2.新能源电力系统国家重点实验室(华北电力大学)北京102206
Experimental Study of Cellulose Particles Effect on Impulse Breakdown in Transformer Oil
Zhao Tao1, Lü Fangcheng1,2, Liu Yunpeng1,2, Cheng Xiangrui1, Wang Fochi1
1.Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense North China Electric Power UniversityBaoding071003 China;
2. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing102206 China
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摘要 针对不同纤维素颗粒物含量的变压器油进行冲击击穿试验研究。应用球盖形电极模拟油中稍不均匀电场,采用波形参数分别为1.4/50 μs、14/220 μs、80/850 μs和240/2400 μs的四种冲击电压对低、中、高三种不同纤维素颗粒度水平的变压器油进行冲击击穿试验。试验结果的统计分析显示,冲击电压波形和纤维素颗粒度水平均对变压器油的击穿电压产生影响,更长的波形持续时间或更高的纤维素颗粒度水平均导致冲击击穿电压的降低。特别是高颗粒度水平油样在80/850 μs和240/2400 μs的冲击电压下的U50%下降显著。通过对纤维素颗粒在1.4/50 μs和240/2400 μs冲击电压下的运动观测发现,240/2400 μs冲击电压可促进纤维素颗粒物在电极间强场区的聚集,导致油间隙击穿电压的进一步降低。
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关键词 变压器油冲击电压纤维素颗粒运动    
Abstract:This paper conducts an experimental research about the effect of cellulose particles on impulse breakdown in transformer oil. The hemispherical electrodes immersed in the bulk of the transformer oil are used to form a quasi-uniform electric field. The breakdown tests are carried out and the breakdown voltages for three cellulose contamination levels oil under four kinds of impulse, 1.4/50 μs,14/220 μs,80/850 μs and 250/2600 μs, are obtained. The results show that both the impulse waveshape and cellulose contamination level exert an effect on the breakdown voltage of transformer oil. Specifically, longer impulse durationor higher cellulose contamination levels of transformer oil lead to the decrease of impulse breakdown voltage. It is noted that the effect of the high level cellulose contamination for U50% becomes much more significant under the impulses of 80/850 μs and 240/2400 μs. Another relevantexperiment is finally conducted under the impulses of 1.4/50 μsand 240/2400 μs on cellulose particlesmotion in transformer oil gap submitted to a divergent electric field, and the suspension and aggregation of cellulose particles are observed under the impulses of 240/2400 μs. It is concluded that the particle can play a catalytic role in the impulse breakdown of the oil gap.
Key wordsTransformer oil    impulse voltage    cellulose particle    motion   
收稿日期: 2017-01-23      出版日期: 2018-04-12
PACS: TM855  
基金资助:中央高校基本科研业务费专项资金资助项目(2015MS90)
通讯作者: 赵涛男,1982年生,讲师,博士研究生,研究方向为电气设备状态检测与故障诊断。E-mail:alibabazhao@163.com   
作者简介: 律方成男,1963年生,教授,博士生导师,研究方向为电气设备状态检测与故障诊断、灵活交流输电等。E-mail:lfc@ncepu.edu.cn
引用本文:   
赵涛, 律方成, 刘云鹏, 程祥瑞, 汪佛池. 纤维素颗粒物对变压器击击穿特性影响的试验研究[J]. 电工技术学报, 2018, 33(7): 1626-1633. Zhao Tao, Lü Fangcheng, Liu Yunpeng, Cheng Xiangrui, Wang Fochi. Experimental Study of Cellulose Particles Effect on Impulse Breakdown in Transformer Oil. Transactions of China Electrotechnical Society, 2018, 33(7): 1626-1633.
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