Investigation of Effects of Different High Voltage Types on Dielectric Strength of Insulating Liquids

被引:10
|
作者
Atalar, Fatih [1 ]
Ersoy, Aysel [1 ]
Rozga, Pawel [2 ]
机构
[1] Istanbul Univ Cerrahpasa, Dept Elect & Elect Engn, TR-34320 Istanbul, Turkey
[2] Lodz Univ Technol, Inst Elect Power Engn, PL-90537 Lodz, Poland
关键词
dielectric liquid; transformer; breakdown voltage; partial discharge; electrical stress; ESTER TRANSFORMER LIQUIDS; MINERAL-OIL; BREAKDOWN; AC; DC;
D O I
10.3390/en15218116
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Liquid dielectrics are different from each other, but are used to perform the same tasks in high-voltage electrical equipment, especially transformers. In similar conditions, the insulation performance of transformer oils under different types of voltage will provide dielectric resistance. In this study, three different dielectric liquids applied in transformers, namely mineral oil, natural ester and synthetic ester, were tested. Tests under AC and negative DC voltage were performed at electrode gaps of 2.5 mm, 2 mm and 1 mm using disk and VDE type electrodes as per ASTM D1816-84A and ASTM D877-87 standards, respectively. In turn, the impulse voltage tests were performed under an electrode configuration suggested by the IEC 60897 standard. The current data of 500 ms prior to breakdown under AC electrical field stress was decomposed using the empirical mode decomposition (EMD) and variational mode decomposition (VMD) methods. These analyses were conducted before the full electrical breakdown. Although synthetic ester has the highest dielectric strength under AC and negative DC electrical field stress, mineral oil has been assessed to be the most resistant liquid dielectric at lightning impulse voltages. In addition, stabilization of mineral oil under AC and negative DC voltage was also seen to be good with the help of calculated standard deviation values. However, synthetic ester has a significant advantage, especially in terms of dielectric performance, over mineral oil in spite of the stability of mineral oil. This indicates that liquid dielectric selection for transformers must be carried out as a combined evaluation of multiple parameters.
引用
收藏
页数:25
相关论文
共 50 条
  • [1] Investigation of dielectric strength of solid insulating materials
    Banaszczyk, Jedrzej
    Adamczyk, Bartlomiej
    2017 PROGRESS IN APPLIED ELECTRICAL ENGINEERING (PAEE), 2017,
  • [2] DIELECTRIC STRENGTH OF LIQUIDS FOR SHORT PULSES OF VOLTAGE
    MACFADYEN, KA
    EDWARDS, WD
    NATURE, 1949, 163 (4135) : 171 - 172
  • [3] Dielectric response of cellulose impregnated with different insulating liquids
    Graczkowski, Andrzej
    PRZEGLAD ELEKTROTECHNICZNY, 2010, 86 (11B): : 223 - 225
  • [4] Challenge of mixed insulating liquids for use in high-voltage transformers, part 1: Investigation of mixed liquids
    Fofana, I
    Wasserberg, V
    Borsi, H
    Gockenbach, E
    IEEE ELECTRICAL INSULATION MAGAZINE, 2002, 18 (03) : 18 - 31
  • [5] Conductivity in Insulating Liquids Subjected to High Voltage.
    Felici, N.J.
    Energia Elettrica, 1983, 60 (10): : 379 - 385
  • [6] Application of statistical methods simplified to the testing of dielectric strength of insulating liquids
    Marchi, CD
    Pennacchi, D
    Pagan, FB
    Cavallaro, J
    Martinez, MLB
    EIGHTH INTERNATIONAL CONFERENCE ON DIELECTRIC MATERIALS, MEASUREMENTS AND APPLICATIONS, 2000, (473): : 297 - 301
  • [7] Dielectric Liquids for Subsea High Voltage Equipment
    Singha, S.
    Laneryd, T.
    Gradinger, T.
    Lendenmann, H.
    2017 IEEE 19TH INTERNATIONAL CONFERENCE ON DIELECTRIC LIQUIDS (ICDL), 2017,
  • [8] Dielectric Properties of Electrical Insulating Liquids for High Voltage Electric Devices in a Time-Varying Electric Field
    Havran, Peter
    Cimbala, Roman
    Kurimsky, Juraj
    Dolnik, Bystrik
    Kolcunova, Iraida
    Medved', Dusan
    Kiraly, Jozef
    Kohan, Vladimir
    Sarpataky, L'ubos
    ENERGIES, 2022, 15 (01)
  • [9] Dielectric Strength, Breakdown Voltage and Acidity Test With Respect to Transformer Insulating Oil
    Adejumobi, I. A.
    ADVANCES IN MATERIALS AND SYSTEMS TECHNOLOGIES II, 2009, 62-64 : 120 - 125
  • [10] A simple qualitative model for the different types of streamers in dielectric liquids
    Biller, P
    ICDL 1996 - 12TH INTERNATIONAL CONFERENCE ON CONDUCTION AND BREAKDOWN IN DIELECTRIC LIQUIDS, 1996, : 189 - 192