A modular converter device, combined converter and control method

Abstract

The invention discloses a modular converter device, which includes at least one bipolar converter, a positive switch and a negative switch; the bipolar converter includes an AC-DC converter and a DC-DC converter, the The AC-DC converter can realize the conversion of AC power and DC power, the DC-DC converter can realize the amplitude conversion between DC power and DC power, and the input and output ends of the two-stage converter are connected in series; the invention also discloses a A combined converter composed of modular converters and a control method thereof, the combined converter can realize the recombination of the modular converters in the converter in a series-parallel manner through the switching of switches, and the load The voltage and current requirements have a larger application range, low cost, high reliability, and easy to implement.

Description

Technical field [0001] The present invention belongs to the field of high power electrical electron becoming technology, and more particularly to a modular variable flow device, a combined converter and a control method. Background technique [0002] The high-voltage large-capacity power electronics is strongly customized, and is usually based on the actual application, once the topology is determined, the application of the applicable parameter range of the entire device determines that once the demand varies, the original device needs to be performed. Reconstruction, the cost of transformation is high, difficult; for some specific applications, such as using the power electronics to carry ice, the length of the lines of ice, the equivalent load resistance is uncertain, the device The work range requires higher requirements. Therefore, there is a need for a versatile power electronic device that meets the needs of higher operating ranges without increasing too much cost. Invent...

AI Technical Summary

Problems solved by technology

[0002] High-voltage and large-capacity power electronic devices are highly customizable, and the parameters are usually designed according to the actual application. Once the topology is determined, the applicable parameter range of the entire device is determined. Once the demand changes, the original device needs to be modified. Retrofitting is costly and difficult; for some specific applications, such as using power electronic devices to melt ice on DC lines, the length of the ice-thawing line is uncertain, and the equivalent load resistance is uncertain, which affects the stability of the device. The scope of work is more demanding

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