Multi-port direct-current power supply and combined control method

Abstract

The invention discloses a multi-port direct-current power supply. The multi-port direct-current power supply comprises a multi-winding transformer and a power unit. The multi-winding transformer internally comprises a 10kV input winding and 27 groups of 380V output windings, the output windings are connected with the alternating-current input end of the power unit, and the direct-current output end of the power unit is divided into 750V output and 825V output; a multi-port flexible combination method is provided to realize multi-direct-current voltage level power supply ports, the ports are multiple, the voltage levels are multiple, the multiplexing functions are multiple, and the power supply is suitable for various types of working conditions and test occasions; a multi-winding transformer technology is mature, and the technical difficulty of direct connection of the power units can be greatly reduced; and the structure, the size and the device specification of the power unit can adopt a unified model, and all the power units adopt the same design so that mutual replacement and maintenance are facilitated. By means of the combined control mode of a direct current side, voltages of all ports can exist at the same time, the insulation level of a low-voltage side X winding, a low-voltage side Y winding and a low-voltage side Z winding of the multi-winding transformer is reduced, and the purpose of reducing the size and the cost of the multi-winding transformer is achieved.

Description

technical field [0001] The invention relates to the technical field of power electronic conversion, in particular to a multi-port DC power supply and a combination control method. Background technique [0002] With the continuous development of industrial technology, various types of new loads are increasing, and various new types of power quality control equipment are increasing, resulting in the increase of various DC power supplies, DC test power supplies, and industrial power supply DC system power supplies, especially the multi-level requirements for voltage interfaces. more and more obvious. [0003] For example, the demand for various types of DC power supplies has increased significantly, 750V DC inverter air conditioner power supply, 750V low-voltage power quality control facility test inverter performance power supply, 1500V subway power supply, 3000V and 3300V special equipment test power supply, 6000V and 6300V and 100000V power supply The demand for various pow...

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Problems solved by technology

[0003] For example, the demand for various types of DC power supplies has increased significantly, 750V DC inverter air conditioner power supply, 750V low-voltage power quality control facility test inverter performance power supply, 1500V subway power supply, 3000V and 3300V special equipment test power supply, 6000V and 6300V and 100000V power supply The demand for various power supplies such as experimental power supplies for high-voltage power electronic equipment has increased significantly, but traditional power supply voltage interfaces are few and the adaptation range is small. There is little research on multiplexed DC power supplies with multiple interfaces and multiple voltage levels

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