Three-phase resonance topology capable of reducing duty ratio loss and auxiliary switch modulation method thereof

A technology of duty cycle loss and resonant topology, applied in the direction of adjusting electrical variables, control/regulation systems, output power conversion devices, etc., can solve problems such as output voltage energy loss, reduce current distortion factor, improve sine degree, Improves the effect of power transfer

Active Publication Date: 2021-03-02
YANSHAN UNIV
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  • Application Information

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Problems solved by technology

Due to the leakage inductance of the winding of the high-frequency transformer, when the switching conversion of the matrix converter on the grid side requires commutation, the existence of the leakage inductance will cause the output voltage energy loss

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  • Three-phase resonance topology capable of reducing duty ratio loss and auxiliary switch modulation method thereof
  • Three-phase resonance topology capable of reducing duty ratio loss and auxiliary switch modulation method thereof
  • Three-phase resonance topology capable of reducing duty ratio loss and auxiliary switch modulation method thereof

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Embodiment Construction

[0032] The technical solutions of the present invention will be clearly and completely described below through specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0033] Such as Figure 1-13 As shown, the three-phase resonant topology that reduces the loss of duty cycle, the solid-state transformer topology mainly includes: three-phase AC power supply, input filter, pre-stage matrix converter, auxiliary resonant circuit, high-frequency transformer, post-stage A matrix converter, an output filter and a load end are sequentially connected in series.

[0034] Preferably, the output end of each phase of the three-phase AC power supply is connected in series with a resistor, the other end ...

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Abstract

The invention relates to the technical field of power electronic power converter topology, in particular to a three-phase resonance topology capable of reducing duty ratio loss and an auxiliary switchmodulation method thereof. The three-phase resonance topology is mainly formed by sequentially connecting a three-phase alternating-current power supply, an input filter, a preceding-stage matrix converter, an auxiliary resonance circuit, a high-frequency transformer, a backward-stage matrix converter, an output filter and a load in series. The high-frequency transformer is adopted for magnetic coupling and power transmission, the auxiliary resonance circuit is connected with the capacitor in series and the primary side leakage inductance resonance of the transformer so that the leakage inductance current can be reversed in the expected time period, the duty ratio loss is reduced, the power loss is reduced, and the transmission efficiency is improved; and in order to enable a bidirectional switch of the matrix converter to work reasonably, optimized current type vector modulation is adopted in the front stage and the rear stage, and voltage spikes generated due to leakage inductance of a transformer are effectively restrained.

Description

technical field [0001] The invention relates to the technical field of power electronic power converter topology, in particular to a three-phase resonant topology with reduced duty cycle loss and an auxiliary switch modulation method thereof. Background technique [0002] The power transformer is an integral part of the power system. The traditional power transformer has the advantages of simple structure, high reliability and low cost. However, it also has disadvantages such as large volume, heavy weight, and high no-load loss. Since traditional transformers do not have the ability to control voltage and current, as long as there is a power quality problem on one side of the primary side and the secondary side, it will be transmitted to the other side, affecting the normal operation of the other side. Traditional transformers need to be equipped with special relay protection. The device is protected. Power electronics technology uses power electronic devices to transform ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/088H02M1/32
CPCH02M3/33584H02M1/088H02M1/32Y02B70/10
Inventor 闫朝阳石璐琳王璐卫炳昂赵丁选张祝新刘涛
Owner YANSHAN UNIV
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