Totem-pole rectifier control method based on zero-crossing point current distortion online compensation

A technology of zero-crossing distortion and control method, applied in the field of electric power, can solve problems such as current distortion at the zero-crossing point of AC voltage, and achieve the effect of eliminating waveform distortion and increasing the amount of calculation and complexity.

Active Publication Date: 2020-12-22
XI AN JIAOTONG UNIV
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Problems solved by technology

[0011] In order to solve the problem of current distortion at the zero-crossing point of the AC voltage in the prior art, the present invention proposes a control method for a totem pole rectifier based on online compensation of current distortion at the zero-crossing point

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  • Totem-pole rectifier control method based on zero-crossing point current distortion online compensation
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  • Totem-pole rectifier control method based on zero-crossing point current distortion online compensation

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[0038] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, 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 making creative efforts shall fall within the protection scope of the present invention.

[0039] Since the control loops of the totem-pole rectifier are the same in the positive and negative half cycles and the voltage polarity and power flow reference direction are opposite, the distortion of the current has a point-symmetric characteristic about the zero crossing point. Accordingly, the information is extracted during the ...

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Abstract

The invention discloses a totem-pole rectifier control method based on zero-crossing distortion online compensation, and the method comprises the following steps: extracting current distortion information in a power grid voltage zero-crossing region of a totem-pole power factor correction rectifier through an average algorithm triggered by a grid-side voltage phase, and compensating the current loop in the reference value of the current loop in the whole power frequency period to eliminate waveform distortion of the current at the zero crossing point, as shown in Figure 1. In other stages, themain function of the control loop is to compensate the current reference value according to the previous calculation result, so that the novel control strategy does not increase the calculation burden and complexity of the controller, and the stability of the converter is not reduced.

Description

technical field [0001] The invention belongs to the technical field of electric power, and in particular relates to a control method for eliminating current distortion at a zero-crossing point of an AC voltage of a totem pole type power factor correction (PowerFactor Correction, PFC) rectifier. Background technique [0002] A large number of common electrical equipment needs to convert the AC mains power into the required DC power through the power electronic converter to provide the required energy for the load, such as electric vehicle on-board chargers, computers, washing machines, etc. Traditional diode rectification circuits will generate a large number of high-order harmonics, resulting in serious power environmental pollution and low energy utilization. In order to ensure the quality of power grid power and energy conversion efficiency, relevant international and domestic organizations have formulated standards such as IEC1000-3-2, IEC555-2, and IEEE519, which impose ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/12H02M1/42H02M7/217H02M7/219
CPCH02M1/12H02M1/4208H02M1/4233H02M7/217H02M7/219H02M1/0038Y02B70/10
Inventor 张岩张金水高远高晓阳刘进军
Owner XI AN JIAOTONG UNIV
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