Abstract
This paper proposes a novel method of suppressing the inrush current of transformers. A small-rated voltage-source PWM converter is connected in series to the transformers through a matching transformer. As the connected PWM converter performs a resistor for the source current, no inrush phenomena occurs. The required-ratings of the PWM converter, which performs the damping resistor for the inrush phenomena, is one-four-hundredth as compared to that of the main transformers in single-phase circuits. In three-phase circuits, it is one-nine-hundredth. The basic principle of the proposed method is discussed. Digital computer simulation is implemented to confirm the validity and excellent practicability of the proposed method using the PSCAD/EMTDC. A prototype experimental-model is constructed and tested. The experimental results demonstrate that the proposed method can perfectly suppress the inrush phenomena.
| Original language | English |
|---|---|
| Pages (from-to) | 674-682 |
| Number of pages | 9 |
| Journal | ieej transactions on industry applications |
| Volume | 124 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Sept 1 2004 |
Keywords
- PSCAD/EMTDC
- core-saturation
- inrush current
- re-inrush phenomena
- series-connected voltage-source PWM converter
- transforme model
ASJC Scopus subject areas
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering