A psm high-voltage power supply system and its feedback control implementation method

Abstract

The invention discloses a PSM high-voltage power supply system and a feedback control realization method therefor. The PSM high-voltage power supply system comprises a high-voltage wire-inlet part, wherein the high-voltage wire-inlet part is formed by two high-voltage circuit breaker cabinets which are connected with a high-voltage contactor cabinet in series separately; two high-voltage contactor cabinets are connected with a multi-winding high-voltage isolation transformer separately; the multi-winding high-voltage isolation transformer is connected with low-frequency rectifying power supply modules and high-frequency rectifying power supply modules separately; and the low-frequency rectifying power supply modules and the high-frequency rectifying power supply modules are all connected in series and then connected to a load. By adoption of the PSM high-voltage power supply system and the feedback control realization method therefor, the problem of severe fluctuation on high-voltage output caused by power grid disturbance in a discharging period of an EAST apparatus is well solved, so that the control requirement of a klystron on voltage precision is satisfied, thereby satisfying requirements of various physical experiments.

Description

technical field [0001] The invention relates to the technical field of high-voltage power supply systems based on PSM technology, in particular to a PSM high-voltage power supply system and a feedback control implementation method thereof. Background technique [0002] As the focus of domestic and foreign research in recent years, PSM switching power supply technology has developed rapidly and has been successfully applied in Tokamak auxiliary heating high-voltage power supply systems. The high-voltage power supply system based on PSM switching power supply technology is based on a single rectifier power supply module, and uses the series connection of multiple modules to realize the establishment of the final DC high voltage. The negative feedback mechanism is introduced in the control strategy, and the voltage can be increased through the automatic increase and decrease of modules. Control accuracy, thereby reducing the impact of various disturbances on the output voltage....

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Problems solved by technology

[0005] Therefore, if it is desired to continue to improve the feedback control speed to solve the problem of too fast or excessive disturbance of the system, the rectifier power module is required to have a higher switching frequency, and with the increase of the switching frequency, its development becomes more difficult and the cost will increase significantly. According to estimates, the cost of a rectifier module with 1kHz switching capability is about 50% higher than that of a 100Hz rectifier module

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