Power electronic transformer

Abstract

The embodiment of the invention provides a power electronic transformer. The power electronic transformer comprises a high voltage module, a low voltage module and a soft copper bus bar, wherein the high voltage module and the low voltage module realize the functions of a rectifying level, an isolation level and an inverter level, the high voltage module comprises a circuit of the rectifying leveland a high-frequency chopper in the isolation level, an internal connecting terminal of the circuit of the rectifying level is connected with a first wiring terminal of the high-frequency chopper inthe isolation level; the low voltage module comprises a high-frequency transformer in the isolation level and a circuit of the inverter level, and an internal connecting terminal of the circuit of theinverter level is connected with the secondary side of the high-frequency transformer in the isolation level; and a second connecting terminal of the high-frequency chopper in the isolation level isconnected with the primary side of the high-frequency transformer in the isolation level through the soft copper bus bar. According to the power electronic transformer, the overall size, cost and complexity of a system are lowered advantageously, redundant design of the system is facilitated, and the reliability of the system is improved.

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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