Abstract
The solid state switch mainly based on thyristor becomes people's research focus with more and more flexible alternative current transmission system (FACTS) and high voltage direct current transmission (HVDC) devices applied in power grid. The thyristor junction temperature and its change, which are directly related to its thermal impedance, decide the electrical characteristics and life expectancy of thyristor. Therefore studying its heat transfer characteristic and thermal model is meaningful to the development of thyristor and its valve. The analysis methods of thyristor thermal model were divided into two categories, namely the testing method and the mathematical physics method, and their modeling procedures and equivalent thermal networks respectively were discussed. One method named 'directly identical to each other method' was provided to transform Foster network into Cauer network. The thyristor internal temperature field was analyzed and its impedance was. calculated by finite element method (FEM) digital simulation. Testing results show that the method is effective.
| Original language | English |
|---|---|
| Pages (from-to) | 1-6 |
| Number of pages | 6 |
| Journal | Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering |
| Volume | 27 |
| Issue number | 19 |
| State | Published - 5 Jul 2007 |
Keywords
- Finite element method
- Thermal impedance
- Thermal resistance
- Thyristor
