Method for controlling energy flow of current transformer of composite power supply system and current transformer

Abstract

The invention discloses a method for controlling the energy flow of a current transformer of a composite power supply system and the current transformer. The method comprises the following steps: detecting a working condition of a load motor; when the whole load motor is at a traction working condition, controlling the current transformer to supply the power of one or more power supply systems in the composite power supply system to the motor; when the whole load motor is at a braking working condition, controlling the current transformer to supply the power generated when the motor brakes to the one or more power supply systems in the composite power supply system; when a part of load motor is at the traction working condition and the other part of load motor is at the braking working condition, controlling the current transformer to supply the power generated when the motor is at the braking working condition to the motor which is at the traction working condition, excepting for supplying the power of the one or more power supply systems in the composite power supply system to the motor. According to the method and the current transformer disclosed by the invention, the problem that an existing current transformer is single in flowing direction and single in power supply form can be solved.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an energy flow method and a converter for controlling a converter of a compound power supply system. Background technique [0002] At present, the power supply form of the converter is relatively simple, and basically all of them are powered by the grid. When the converter is working, the energy flow direction is relatively single, and the energy cannot be effectively used, resulting in a great waste of energy. For the converters used in some special occasions, they are highly dependent on the power supply grid, and the converters are required to be in working state for a long time and cannot be shut down. If the power grid fails, the converter is required to be shut down for maintenance, and the loss is immeasurable. At the same time, the current power supply form of my country's power grid is mainly provided by fossil energy with limited resources and pollution to t...

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Problems solved by technology

[0003] In order to solve the above problems, the present invention provides a method for controlling the energy flow of a converter of a composite power supply system and the converter, which are used to solve the problems of single energy flow direction and single power supply form of current converters

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