Influence of DC Component on Partial Discharge Characteristics of Needle-plane Defect in Oil-paper Insulation Under AC-DC Combined Voltage

被引：0
|
作者：
Li X. [1 ,2 ]
Ji S. [1 ]
Cui Y. [1 ]
Pan L. [1 ]
Zhu L. [1 ]
Xiao Y. [1 ]
机构：
[1] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an
[2] China Electric Power Science Research Institute, Beijing
来源：
Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 12期
基金：
国家重点研发计划;
关键词：
AC-DC combined voltage; DC component; Needle-plane defect; Oil-paper insulation; Partial discharge;
D O I：
10.13336/j.1003-6520.hve.20191125012
中图分类号：
学科分类号：
摘要：
The internal insulation of valve side windings in converter transformer withstands AC-DC combined voltage, of which the DC component has a more complicated influence on the oil-paper insulation than pure AC voltage. Taking the influence of the DC component on partial discharge (PD) characteristics in oil-paper insulation under highly inhomogeneous electric filed into consideration, we investigated PD parameters in initial and pre-breakdown stages of needle-plane defects under AC-DC combined voltages with different DC components by using the pulse current method. Results show that the PD inception and breakdown voltages increase with the increase of DC component as a result of the accumulation of space charges injected by DC voltage. However, the increase of DC proportion decreases the PD pulse repetition rate and discharge amplitude during the whole developing process, but has no direct relationship with the mean equivalent time and frequency. Meanwhile, with a higher DC component, the PD phase moves from two locations to concentration in the positive half cycle. These results can be the reference for the recognition of PD mode under AC-DC combined voltage with different DC components. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：3869 / 3878
页数：9
相关论文
共 21 条
  • [1] Liu Z., Ultra High Voltage AC and DC Power Grid, (2013)
  • [2] Qi B., Wei Z., Li C., Et al., Discharge characteristics of the typical defects in oil-paper insulation under AC-DC compound voltage, High Voltage Engineering, 41, 2, pp. 639-646, (2015)
  • [3] Li Q., Li S., Si W., Et al., Analysis of the key problem about insulation condition assessment of oil-paper in power transformers based on partial discharge, High Voltage Engineering, 43, 8, pp. 2558-2565, (2017)
  • [4] Li J., Han X., Li Y., Et al., Review on partial discharge measurement technology of electrical equipment, High Voltage Engineering, 41, 8, pp. 2583-2601, (2015)
  • [5] Takahashi E., Tsutsumi Y., Okuyama K., Et al., Partial discharge characteristics of oil-immersed insulation systems under DC, combined AC-DC and DC reversed polarity voltage, IEEE Transactions on Power Apparatus and Systems, 95, 1, pp. 411-420, (1976)
  • [6] Zhou Y., Jin F., Huang M., Et al., Effects of thermal aging on creepage discharge in oil-impregnated pressboard under combined AC-DC voltage, IEEE Transactions on Dielectrics and Electrical Insulation, 22, 5, pp. 2737-2746, (2015)
  • [7] Jin F., Zhou Y., Huang J., Et al., Effects of electrical field component on characteristics of creepage discharge in oil-impregnated pressboard under combined AC/DC voltage, High Voltage Engineering, 44, 8, pp. 2516-2524, (2018)
  • [8] Qi B., Wei Z., Li C., Et al., Influences of different ratios of AC-DC combined voltage on internal gas cavity discharge in oil-pressboard insulation, IEEE Transactions on Power Delivery, 31, 3, pp. 1026-1033, (2016)
  • [9] Cui Y., Zhu L., Ji S., Et al., Partial discharge development in needle-plane configuration of oil-paper insulation under AC voltage, IEEE Transactions on Dielectrics and Electrical Insulation, 24, 4, pp. 2469-2476, (2017)
  • [10] Sha Y., Zhou Y., Nie D., Et al., Partial discharge process in transformer oil and electrical insulation paper under DC stress, High Voltage Engineering, 40, 1, pp. 80-86, (2014)
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