Self-starting control apparatus for intelligent electric energy router DC unit and self-starting method

Abstract

A self-starting control apparatus for intelligent electric energy router DC unit and a self-starting method are disclosed. An input side H-bridge control circuit takes electricity from an input side power supply through a first draw-out power coil, and an output side H-bridge control circuit takes electricity from an output side DC capacitor through a second draw-out power coil. The convertor self-starting method comprises the steps in which an output side H-bridge switch is locked, an output side H-bridge is equivalent to a uncontrolled rectifier bridge and the switching state of an input side H-bridge is adjusted so that the duty ratio D of an AC square wave outputted by the input side H-bridge gradually rises from 0 to 0.5. When the voltage of the output side DC capacitor is stabilized, the output side H-bridge switch is changed into a controlled state.

Description

technical field [0001] The invention relates to a self-starting control device and a self-starting method of a DC unit of an intelligent power router. Background technique [0002] The H-bridge switches on the input side and output side of the DC unit of the smart power router are controllable switching devices, which can realize bidirectional flow of energy. The high-frequency transformer in the middle has the function of electrical isolation, and has the advantages of small size and high power density. The power router DC unit has important applications in locomotive traction, power electronic transformers, and renewable energy generation. [0003] The DC unit of the smart power router is usually in the form of module cascading or with other types of converters, such as AC / DC, DC / AC, to form a high-voltage, high-power energy conversion system. The self-starting mode of the DC unit of the smart power router has reference significance for the self-starting mode of the energ...

AI Technical Summary

Problems solved by technology

[0004] In the existing DC unit self-starting methods, some methods connect variable resistors in series on the DC voltage input side, and by changing the resistance value of the series resistors, the H-bridge DC voltage on the input side gradually increases from a small value. , but the series resistance will increase the loss, and the mechanical contact reduces the reliability; some use auxiliary circuits, but this method increases the complexity of circuit control, and cannot realize the input-side H-bridge and output-side H-bridge control circuits electrical isolation

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