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Control method and device of direct-current converter and computer readable storage medium

A technology of a DC converter and a control method is applied in the direction of converting DC power input to DC power output, output power conversion device, control/regulation system, etc., and can solve the problems of poor response of dual active full-bridge DC converters, etc. Achieve the effect of reducing response time, avoiding oscillation and overshoot, and suppressing DC bias

Active Publication Date: 2022-07-29
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a control method, device and computer-readable storage medium of a DC converter, aiming to solve the technical problem of poor response in the transient process of a dual-active full-bridge DC converter

Method used

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  • Control method and device of direct-current converter and computer readable storage medium
  • Control method and device of direct-current converter and computer readable storage medium
  • Control method and device of direct-current converter and computer readable storage medium

Examples

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no. 1 example

[0074] Based on the first embodiment, a second embodiment of the control method of the DC converter of the present invention is proposed. In this embodiment, step S103 includes:

[0075] Step S201, based on the feedforward output value and the PI output value, determine a second phase shift angle under the target steady state condition corresponding to the DC converter;

[0076] Step S202, determining the first pulse control signal and the second pulse control signal based on the first phase shift angle and the second phase shift angle.

[0077]In this embodiment, after the feedforward output value and the PI output value are obtained, the second phase shift angle under the target steady state condition corresponding to the DC converter is determined based on the feedforward output value and the PI output value, The second phase shift angle is the feedback sum between the feedforward output value and the PI output value. For example, an adder is provided between the pulse modu...

no. 2 example

[0080] Based on the second embodiment, a third embodiment of the control method for the DC converter of the present invention is proposed. In this embodiment, step S202 includes:

[0081] Step S301, based on the first phase shift angle and the second phase shift angle, determine the pulse width of the primary positive pulse and the primary negative pulse width of the first pulse control signal by a pulse modulator;

[0082] Step S302 , based on the first phase shift angle and the second phase shift angle, determine the pulse width of the secondary positive pulse of the second pulse control signal through a pulse modulator.

[0083] In this embodiment, the pulse modulator determines the pulse width of the primary positive pulse and the primary negative pulse width of the first pulse control signal based on the first phase shift angle and the second phase shift angle. Specifically, the Step S301 includes:

[0084] Step S3011, based on the first phase shift angle, the second pha...

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Abstract

The invention discloses a control method and device of a direct-current converter and a computer readable storage medium, and the method comprises the steps: obtaining a first phase shift angle corresponding to the direct-current converter under an initial steady-state condition when the full-bridge direct-current converter is in a transient process; obtaining a feed-forward output value of feed-forward control and a PI output value of PI control corresponding to the DC converter; and determining a first pulse control signal of the primary side full-bridge converter and a second pulse control signal of the secondary side full-bridge converter based on the first phase shift angle, the feed-forward output value and the PI output value. According to the invention, the DC bias generated by the inductive current in the power change process can be effectively suppressed, the response time of the transient process of the DC converter is reduced, oscillation and overshoot of the power supply current are avoided, and the power supply current can reach a new steady state more quickly.

Description

technical field [0001] The present invention relates to the technical field of DC converters, and in particular, to a control method, device and computer-readable storage medium of a DC converter. Background technique [0002] Dual-Active Bridge (DAB type) DC converters have the advantages of electrical isolation, bidirectional power transmission and high power density, and are widely used in energy storage and other fields. DAB type DC converter is mainly composed of primary side full bridge converter, secondary side full bridge converter and high frequency transformer. [0003] At present, most of the existing dual-active full-bridge DC converters use two-sided PWM control. During the control process of traditional PWM control, the inductor current will generate a DC bias, resulting in a long response time and poor response in the transient process of the DC converter. . [0004] The above content is only used to assist the understanding of the technical solutions of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/32
CPCH02M3/3353H02M1/32Y02B70/10
Inventor 尹健赫晓超
Owner SHENZHEN UNIV