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Single-phase power factor corrector in direct network-side power control

A technology of power control and single-phase power, which is applied in the direction of converting AC power input to DC power output, output power conversion device, and high-efficiency power electronic conversion. It can solve the problems of not fully utilizing single-cycle control, limiting single-cycle response speed, Reduce system reliability and other issues, achieve the effect of realizing power following characteristics, improving design difficulty, and high power factor correction effect

Inactive Publication Date: 2013-09-18
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0006] [2] Hu Zongbo and Zhang Bo et al. "Theoretical Analysis and Experimental Verification of Single-Cycle Control Applicability of BOOST Power Factor Correction Converter". Chinese Journal of Electrical Engineering. V25, No.21, 2005.11: 19-23; its main technical features are as follows : The voltage error amplifier is used as the voltage outer loop, the response speed is affected, and the advantages of single-cycle control are not fully utilized;
[0007] [3] He Zhiyuan and Wei Wei. "Research on Direct Power Control of PWM Rectifier Based on Virtual Flux Linkage". Journal of Zhejiang University. V38, No.12, 2004.11: 1619-1622; its main technical characteristics are as follows: three-phase rectifier, response speed Fast, but due to the use of bang control, it brings sudden changes in switching frequency and introduces disturbance and noise, which reduces the reliability of the system and even deteriorates the performance of the system
[0008] Based on the above, the search for the prior art of single-phase active power factor correctors found that single-cycle control and direct power control have the advantages of fast response, but the outer voltage loop limits the single-cycle response speed, and the switching frequency of traditional direct power control Potential instability of the system due to drastic changes

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  • Single-phase power factor corrector in direct network-side power control

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Embodiment Construction

[0048] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0049] like figure 1 As shown, this embodiment provides a single-phase power factor corrector for direct grid-side power control, including a power circuit 1, an auxiliary circuit 2 and a control module 3, wherein: the power circuit 1 completes the single-phase AC-DC power transformation; the auxiliary circuit 2 is connected to the power circuit 1 to complete the instantaneous detection of the rectified voltage (i.e. the input voltage), the inductor current (i.e. reflecting the input current), the...

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Abstract

The invention provides a single-phase power factor corrector in direct network-side power control. The single-phase power factor corrector comprises a power circuit, an auxiliary circuit and a control module, wherein the power circuit is used for completing single-phase AC-DC (Alternating Current-Direct Current) power conversion; the auxiliary circuit is connected with the power circuit, and is used for completing the instant detection of input voltage, input current and output voltage and the driving of an original PWM (Pulse-Width Modulation) pulse and outputting measured electric quantity to the control module; and the control module is used for carrying out digital operation and logical processing according to direct power control and a single-period control principle after various detection electric quantities of the auxiliary circuit are received, obtaining an original driving pulse, and finally completing power factor correction by virtue of the power circuit and outputting stable DC voltage. According to the single-phase power factor corrector provided by the invention, the single-phase AC-DC conversion of a network-side unit power factor is realized, and the single-phase power factor corrector has the advantages of quick response speed, strong anti-jamming capacity, capability of adapting to load change in a wider range and load following characteristics, and is an ideal single-phase power factor correction scheme.

Description

technical field [0001] The present invention relates to a single-phase power factor corrector (PFC) in the technical field of power electronic conversion, in particular to a single-phase power factor corrector with direct grid-side power control. Background technique [0002] In order to suppress the harmonic current generated by the single-phase AC-DC converter using the rectifier bridge, reduce the harmonic current interference, and make it meet the harmonic current standard, a single-phase active power factor correction (PFC) technology is required. Single-phase active power factor correction technology has a variety of control strategies, such as double closed-loop control, single-cycle control, etc., and can obtain good correction results. Among them, the single-phase active PFC with single-cycle control has good power factor correction effect, fast dynamic response and strong robustness. But in principle, the single-cycle control does not involve the voltage outer loo...

Claims

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Application Information

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IPC IPC(8): H02M7/217H02M1/42
CPCY02B70/10
Inventor 曾超唐思文杨喜军
Owner SHANGHAI JIAO TONG UNIV
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