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Electromagnetic Transient Simulation System for Power Modules of Cascaded H-Bridge Power Electronic Transformers

An electromagnetic transient simulation and power module technology, applied in the field of simulation systems, can solve problems such as the inability to realize electromagnetic transient simulation of cascaded H-bridge power electronic transformer power modules and the like

Active Publication Date: 2020-07-31
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN109271698A proposes a modeling method for a resonant double active bridge converter, which only establishes a small signal system of a resonant double active bridge converter on the basis of the average value system, and it cannot realize cascaded H-bridge type power electronics Electromagnetic Transient Simulation of Transformer Power Module

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  • Electromagnetic Transient Simulation System for Power Modules of Cascaded H-Bridge Power Electronic Transformers
  • Electromagnetic Transient Simulation System for Power Modules of Cascaded H-Bridge Power Electronic Transformers
  • Electromagnetic Transient Simulation System for Power Modules of Cascaded H-Bridge Power Electronic Transformers

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] figure 1 It is a structural diagram of a cascaded H-bridge type power electronic transformer power module, and the described cascaded H-bridge type power electronic transformer power module includes a first switch S 1 , the second switch S 2 , the third switch S 3 , the fourth switch S 4 , the fifth switch S 5 , the sixth switch S 6 , the seventh switch S 7 , the eighth switch S 8 , the ninth switch S 9 , the tenth switch S 10 , the eleventh switch S 11 , the twelfth switch S 12 , primary capacitance C p , Secondary capacitance C s , primary side resonant capacitor C rp , Primary side resonant inductance L rp , Primary side resonant resistance R r , Secondary side resonant capacitor C rs , High frequency transformer T r , the ratio of the primary side to the secondary side of the high-frequency transformer is n p :n s ...

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Abstract

Disclosed is a cascade H-bridge type power electronic transformer power module electromagnetic transient simulation model; the electromagnetic transient simulation model is composed of an AC / DC converter simulation model as a first component, a primary side capacitor simulation model as a second component, a high-frequency isolation type DC / DC converter simulation model as a third component, and asecondary side capacitor simulation model as a fourth component. According to the model, the dimensionality of the power module simulation circuit node admittance matrix can be reduced, frequent switching of the simulation circuit node admittance matrix parameters caused by high-frequency switch operation is avoided, and the electromagnetic transient simulation speed of the power module is increased. According to the method, two different time scales are adopted for simulation, different time scale simulation calculation is adopted according to the characteristics of various switching frequencies of the power module, and the electromagnetic transient simulation speed of the power module is further improved.

Description

technical field [0001] The invention relates to a simulation system of a cascaded H-bridge power electronic transformer power module. Background technique [0002] Power electronic transformer (Power Electronic Transformer, PET), also known as solid state transformer (Solid State Transformer, SST) and flexible transformer (Flexible Transformer, FT), is to convert electric energy through power electronic conversion circuit, and use medium and high frequency transformers for magnetic coupling and isolation power conversion device. It has the advantages of flexible AC and DC power conversion, controllable energy flow, adjustable power factor, reactive power compensation, harmonic compensation and fast active protection, etc., and has good applications in energy Internet and smart grid. [0003] In the field of medium and high voltage applications, the cascaded H-bridge power electronic transformer is one of the most widely studied typical topologies. The cascaded H-bridge powe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/219H02M3/335
CPCH02M3/33576H02M7/219
Inventor 徐飞李子欣高范强赵聪王平李耀华
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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