Partial Discharges in Liquid Embedded Power Electronics: Effects of Pressure and Liquid Nature under Negative Pulse Voltage Stress

被引：8

作者：

Abdelmalik, A. A. ^{[1
]}

Nysveen, A. ^{[1
]}

Lundgaard, L. E. ^{[2
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Elect Power Engn, N-7034 Trondheim, Norway

[2] SINTEF Energy Res, Elect Power Technol, Trondheim, Norway

来源：

IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION | 2016年 / 23卷 / 02期

关键词：

Partial discharge; space charges; dielectric liquid insulation; power electronics; STREAMERS;

D O I：

10.1109/TDEI.2015.005615

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：

There is a need to develop pressure tolerant insulation for power electronic converters used for oil exploitation at deep sea environment. This paper presents an experimental investigation of partial discharges (PDs) along a trench between metallization edges on printed circuit boards (PCBs) embedded in different insulating liquid under unipolar negative fast transient voltages using optical PD detection system. The liquids studied are Nytro 10XN mineral oil, Midel 7131 synthetic ester and Galden fluorinated liquid. Midel has the highest PD inception voltage (PDIV) of 22 kV with high PD magnitude and followed by breakdown at 23 kV. Galden has PDIV of 19 kV with low PD magnitude. Nytro has PDIV of 9 kV with PD magnitude that increased gradually till breakdown. Covering the trench with parylene resulted in PDIV that ranges from 18 kV to 20 kV with similar PD magnitude. It is quite clear from the results that the nature of the encapsulation materials has significant effect on the insulation integrity of power electronic modules.

引用

页码：1119 / 1125

页数：7