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
  • [31] Research on Dielectric Breakdown Voltage and Electric Field Strength at Triple Junctions on Insulating Substrates for Power Modules
    Hori M.
    Ikeda Y.
    Yamazaki T.
    Muranaka T.
    Nabetani Y.
    Journal of Japan Institute of Electronics Packaging, 2023, 26 (01) : 167 - 171
  • [32] THE ANALYSIS OF THE THERMALAND DIELECTRIC PROPERTIES OF HIGH VOLTAGE INSULATING MATERIALS WITH THE ADDITION OF ALUMINIUM OXIDE
    Tomaskova, T.
    Trnka, P.
    Gutten, M.
    Korenciak, D.
    ARCHIVES OF METALLURGY AND MATERIALS, 2018, 63 (02) : 641 - 646
  • [33] Modification of Insulating Properties of Surfaces of Dielectric High-Voltage Devices Using Plasma
    Pernica, Roman
    Klima, Milos
    Londak, Pavel
    Fiala, Pavel
    APPLIED SCIENCES-BASEL, 2024, 14 (11):
  • [34] Effect of High Temperature on Tensile Strength of Different Types of High-Strength Concrete
    Khaliq, W.
    Kodur, V. K. R.
    ACI MATERIALS JOURNAL, 2011, 108 (04) : 394 - 402
  • [35] Investigation of the charge distribution in the insulating envelope of a high-voltage vacuum device
    V. D. Bochkov
    M. M. Pogorel’skii
    Technical Physics, 1999, 44 : 636 - 640
  • [36] Investigation of the charge distribution in the insulating envelope of a high-voltage vacuum device
    Bochkov, VD
    Pogorel'skii, MM
    TECHNICAL PHYSICS, 1999, 44 (06) : 636 - 640
  • [37] A technique for rapid diagnostics of dielectric liquids basing on their high-voltage conductivity
    Chirkov, V. A.
    Sitnikov, A. A.
    Stishkov, Yu. K.
    JOURNAL OF ELECTROSTATICS, 2016, 81 : 48 - 53
  • [38] EFFECTS OF HIGH ELECTRIC FIELDS ON DIELECTRIC LIQUIDS OF HIGH AND LOW VISCOSITY
    SCHOTT, H
    KAGHAN, WS
    JOURNAL OF APPLIED PHYSICS, 1965, 36 (11) : 3399 - &
  • [39] Accurate Insulating Oil Breakdown Voltage Model Associated with Different Barrier Effects
    Ghoneim, Sherif S. M.
    Dessouky, Sobhy S.
    Boubakeur, Ahmed
    Elfaraskoury, Adel A.
    Abou Sharaf, Ahmed B.
    Mahmoud, Karar
    Lehtonen, Matti
    Darwish, Mohamed M. F.
    PROCESSES, 2021, 9 (04)
  • [40] Assessing contamination severity of high voltage insulators using dielectric loss factor: Laboratory measurements and comparative analysis of leakage current and dielectric loss factor at different voltage levels, humidity, and insulating materials
    Dolnik, Bystrik
    Sarpataky, Lubos
    Bucko, Samuel
    Pavlik, Marek
    Stefko, Robert
    ELECTRIC POWER SYSTEMS RESEARCH, 2023, 225