Development of HVDC power supply for plasma generators

• 1、The State Key Laboratory of Power Transmission Equipment&System Security and New Technology, School of Electrical Engineering, Chongqing University 400044

Abstract：When a plasma generator is driven by a high voltage DC power supply, the load characteristics might contribute to overvoltage in startup process or voltage regulation process. To reduce the influence of overvoltage, a novel high voltageDC power supply was developed in this study. Apart from providing high voltageDC output, the power supply could also adjust the change speed of IGBT drive signal through a specific control circuit. Therefore, the function of regulating voltage smoothly could be realized and the overvoltage could be reduced. Besides, the overvoltage protection could terminate high voltageDC output when severe overvoltage existed, so as to protect the power supply and the loads. In addition to the main functions, the power supply had the ability to stop the voltage output for the plasma generator at a preset time, which was conducive to experiments with fixed plasma treatment time. After the establishment of the high voltageDC power supply, the performance test showed that the power supply could provide adjustable high voltageDC (0-8 kV) to drive the plasma generator, and all designed functions were realized.

Keywords： high voltage test equipment and measurement technology high voltage DC power supply overvoltage plasma generator