Power Electronic Transformer

Abstract

An embodiment of the present invention provides a power electronic transformer, the power electronic transformer includes: a high-voltage module, a low-voltage module and a soft copper bar, wherein the high-voltage module and the low-voltage module realize the rectification stage, isolation stage and inverter stage function, the high-voltage module includes the circuit of the rectification stage and the high-frequency chopper in the isolation stage, the internal connection terminal of the circuit of the rectification stage is connected to the first high-frequency chopper in the isolation stage A connection terminal connection; the low-voltage module includes the high-frequency transformer in the isolation stage and the circuit of the inverter stage, and the internal connection terminal of the circuit of the inverter stage is connected to the high-frequency transformer in the isolation stage Secondary side connection; the second connection terminal of the high frequency chopper in the isolation stage is connected to the primary side of the high frequency transformer in the isolation stage through a soft copper bar. This scheme is beneficial to reduce the overall size, cost and complexity of the system, is beneficial to the redundant design of the system, and improves the reliability of the system.

Description

technical field [0001] The invention relates to the technical field of power generation, in particular to a power electronic transformer. Background technique [0002] With the continuous development of the economy, the demand for electricity is growing faster and faster. At the same time, problems such as energy shortage and environmental protection are becoming more and more prominent. The application of renewable energy generation technology represented by wind power and solar power is becoming more and more mature. Renewable energy Power generation technology is poised to thrive in the future. However, these clean energies usually have the characteristics of scattered locations and far away from power user centers. How to efficiently connect these new energies to the grid or store and digest them locally will become the development direction and research hotspot of future power system technology. The power electronic transformer based on MMC (modular multilevel converte...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a power electronic transformer to solve the technical problem of increasing the overall size, cost and complexity of the system in the prior art of the power electronic transformer

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