Serial connection conversion module with fault isolation function, and power electronic transformer

Abstract

The invention discloses a serial connection conversion module with a fault isolation function, and a power electronic transformer based on the plurality of serial connection conversion modules. Switches are respectively connected in parallel with the input port and the output port of a serial connection conversion module to switch on the parallel connection switches of the input port and the output port when the serial connection conversion module detects faults on the serial connection conversion module itself to make the input port and the output port in a short-circuit state of a bypass state so as to isolate from the faults of the serial connection conversion module and avoid further extension of faults or influence on other modules by faults of the serial connection conversion module.The power electronic transformer applies the plurality of serial connection conversion modules, each serial connection conversion module can perform self isolation when having faults so that the workof other serial connection conversion modules cannot be influenced by the faults of one of the serial connection conversion modules, and an input voltage is only still in a module set operation range, the whole power electronic transformer system still normal works.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a series converter module and a converter with a fault isolation function. Background technique [0002] The power electronic transformer has a power electronic device that converts AC voltage into DC and then forms a high-frequency AC output through semiconductor switching devices, electronic components and high-frequency transformer windings. Power electronic transformers include series converter modules that convert low-frequency alternating current into high-frequency alternating current. When the series converter module itself fails, there is no fault isolation measure for the series converter module in the prior art. Due to the lack of fault isolation measures for the converter module, the fault further expands, causing unnecessary losses to power electronic equipment, especially to power electronic transformers. SUMMARY OF THE INVENTION [0003] I...

AI Technical Summary

Problems solved by technology

Due to the lack of fault isolation measures for converter modules, further expansion of faults has caused unnecessary losses to power electronic equipment, especially power electronic transformers

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