Space Charge Behavior in the Sample with Two Layers of Oil-immersed-paper and Oil

被引:76
作者
Wu, Kai [1 ]
Zhu, Qingdong [1 ]
Wang, Haosen [1 ]
Wang, Xia [1 ]
Li, Shengtao [1 ]
机构
[1] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China
关键词
Oil-immersed-paper; oil; space charge; numerical recovery; interface; electric field distortion; LOW-DENSITY POLYETHYLENE; INSULATION;
D O I
10.1109/TDEI.2014.004241
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Space charge behavior is important in the oil-immersed-paper insulation in converter transformers for HVDC transmission. This paper reports an investigation of the space charge property in samples with two layers of oil-immersed-paper and oil. Based on pulsed electroacoustic (PEA) technique, a waveform recovery method was proposed to get rid of the effects of interface and anisotropy on PEA result, and the space charge distributions in the two-layer samples under different voltage and oil thicknesses were measured. It's found that the charges with the same polarity as oil side electrode were accumulated at the interface and gradually increased with the increase of applied voltage. However, the positive charge charges always appeared in the oil under positive and negative voltages. Moreover, the charges in samples increased with the increase of applied voltage, while the amount of interface charges decreased with the increase of oil thickness. Due to the existence of interfacial charges, the electrical field in oil-immersed-paper was distorted with its maximum close to the interface. It is indicated that due to the different mobility properties of charges in paper and oil and the interface trap state, the interface between paper and oil plays an important role in charge formation and decay.
引用
收藏
页码:1857 / 1865
页数:9
相关论文
共 23 条
[1]   Space charge phenomena in laminated HVDC insulation [J].
Beyer, J ;
Morshuis, PHF ;
Smit, JJ .
1998 INTERNATIONAL SYMPOSIUM ON ELECTRICAL INSULATING MATERIALS, PROCEEDINGS, 1998, :181-186
[2]   Space charge measurements on multi-dielectrics by means of the pulsed electroacoustic method [J].
Bodega, R ;
Morshuis, PHF ;
Smit, JJ .
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2006, 13 (02) :272-281
[3]  
Chao T., 2010, THESIS CHONGQING U C
[4]   Effect of polyethylene interface on space charge formation [J].
Chen, G ;
Tanaka, Y ;
Takada, T ;
Zhong, L .
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2004, 11 (01) :113-121
[5]   Space Charge Measurement in LDPE Films under Temperature Gradient and DC Stress [J].
Chen, X. ;
Wang, X. ;
Wu, K. ;
Peng, Z. R. ;
Cheng, Y. H. ;
Tu, D. M. .
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2010, 17 (06) :1796-1805
[6]   Space charge evolution in oil-paper insulation for DC cables application [J].
Ciobanu, R ;
Schreiner, C ;
Pfeiffer, W ;
Baraboi, B .
PROCEEDINGS OF THE 2002 IEEE 14TH INTERNATIONAL CONFERENCE ON DIELECTRIC LIQUIDS, 2002, :321-324
[7]   ELECTRICAL-FIELD DISTRIBUTION IN TRANSFORMER OIL [J].
GAFVERT, U ;
JAKSTS, A ;
TORNKVIST, C ;
WALFRIDSSON, L .
IEEE TRANSACTIONS ON ELECTRICAL INSULATION, 1992, 27 (03) :647-660
[8]   Influence of Moisture on Space Charge Dynamics in Multilayer Oil-Paper Insulation [J].
Hao, Jian ;
Chen, George ;
Liao, Ruijin ;
Yang, Lijun ;
Tang, Chao .
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2012, 19 (04) :1456-1464
[9]   Mechanisms Behind Positive Streamers and Their Distinct Propagation Modes in Transformer Oil [J].
Hwang, J. George ;
Zahn, Markus ;
Pettersson, Leif A. A. .
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2012, 19 (01) :162-174
[10]   Power Transformer Insulation - History, Technology and Design [J].
Krause, Christoph .
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2012, 19 (06) :1941-1947