Long pulse large power high voltage power supply

Abstract

The present invention discloses a long pulse large power high voltage power supply. The long pulse large power high voltage power supply is characterized by mainly being composed of a multi-winding isolation transformer and a plurality of AC / DC unit modules each of which has two voltage output gears, wherein the multi-winding isolation transformer adopts a mode that the secondary three phase windings are all unfastened, each secondary single phase winding supplies power to one AC / DC unit module, and the three AC / DC unit modules corresponding to the three secondary single phase windings obtained by unfastening the secondary three phase windings are in synchronous control; there are existed two types of AC / DC unit modules, one type of AC / DC unit module is a switch power supply module of which the output voltage is a fixed value, and the other type of AC / DC unit module is a continuous voltage adjustment module of which the output voltage is continuously adjustable; the output ends of the AC / DC unit modules are connected in series mutually. The long pulse large power high voltage power supply of the present invention enables the number of the unit modules and the input transformer secondary windings to be reduced substantially, can realize the smooth and continuous adjustment of the voltage, is stronger in practicality, higher in efficiency and smaller in size, and is more convenient to maintain.

Description

technical field [0001] The invention relates to the field of high-voltage pulse power supply, in particular to a high-voltage pulse power supply system used in the field of controlled nuclear fusion research. Background technique [0002] Tokamak is a circular container that uses magnetic confinement to achieve controlled nuclear fusion. In a tokamak device (such as HL-2A), in order to make the plasma temperature reach the 10keV level required for the fusion reaction, in addition to the traditional ohmic heating, auxiliary heating must be used. As one of the most important systems of the tokamak device, the auxiliary heating system has always been the key development object in various international devices. Auxiliary heating mainly includes neutral beam injection (NBI) and radio frequency wave heating (RF). Among them, radio frequency wave heating mainly includes electron cyclotron resonance heating (ECRH) in the millimeter wave band, low hybrid wave heating (LHH) in the ...

AI Technical Summary

Problems solved by technology

[0007] 1. The output voltage of the pulse DC power supply unit module is low, and the input of each unit module adopts the method of three-phase incoming line. Therefore, in the case of high voltage, the number of power supply modules and the number of secondary windings of the isolation transformer are large, and it is usually necessary to use Two or more sets of rectifier transformers will undoubtedly increase the cost and installation space of the power supply system

[0008] 2. The pulsed DC power supply modules are all switch modules. Although they can realize voltage regulation in a wide range, they can only be adjusted in steps and cannot be adjusted continuously. The voltage regulation accuracy is not high, which is mainly determined by the DC voltage level of the unit module.

[0009] 3. Due to the influence of the short-circuit impedance of the input rectifier transformer, the DC voltage of each module changes with the load, thus affecting the stability of the rear-end output voltage

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