Load current feedforward control method of dual-active-bridge converter based on three-phase-shift modulation

A technology of phase-shift modulation and load current, which is applied in the direction of converting DC power input to DC power output, control/regulation systems, instruments, etc., and can solve problems such as the inability to realize dual active bridges

Active Publication Date: 2020-06-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0007] In order to solve the problem that the prior art method cannot realize that the dual active bridge (DAB) converter has a fast dynamic response under the three-phase-shift control strategy, and the dynamic process is stable without oscillation, the dual active converter disclosed in the present inven...

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  • Load current feedforward control method of dual-active-bridge converter based on three-phase-shift modulation
  • Load current feedforward control method of dual-active-bridge converter based on three-phase-shift modulation
  • Load current feedforward control method of dual-active-bridge converter based on three-phase-shift modulation

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with accompanying drawing and embodiment, have also described the technical problem and beneficial effect that technical solution of the present invention solves simultaneously, it should be pointed out that described embodiment is only intended to facilitate the understanding of the present invention, and to It does not have any limiting effect.

[0042] Such as figure 1 Shown is a dual active bridge (DAB) converter circuit topology diagram, the converter is composed of eight switching tubes, the primary side and the secondary side are composed of four switching tubes. The primary side full bridge contains 4 switching tubes Q 1 -Q 4 . Switch tube Q 1 and switch Q 2 form a bridge arm, Q 1 The drain connection of Q 2 source. Switch tube Q 3 and switch Q 4 form a bridge arm, Q 3 The drain connection of Q 4 source. Switch tube Q 1 The drain and switch Q 3 The drains of the switches are conn...

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Abstract

The invention discloses a load current feedforward control method of a dual-active-bridge converter based on three-phase shift modulation, and belongs to the field of bidirectional DC-DC converters for energy storage in the field of power electronics. The load current feedforward three-phase-shift control strategy based on a dual-active-bridge DAB converter is used for controlling the dual-active-bridge DC-DC converter; a primary side and a secondary side of a main circuit of the dual-active-bridge DC-DC converter are full-bridge circuits; the two full bridges are connected together through aseries inductor and a transformer; the primary side is connected with a storage battery, and the secondary side can be connected with any load; and bidirectional power flow control is achieved by controlling the duty ratio of full bridges on the primary side and the secondary side of the converter and phase shift angles corresponding to two full-bridge voltage waveforms, and the dynamic response of the converter is improved through feedforward control over output current. Rapid dynamic response of the dual-active-bridge (DAB) converter under a three-phase-shift control strategy can be realized, and the dynamic process is stable without oscillation.

Description

technical field [0001] The invention relates to a load current feed-forward control method based on three-phase-shift control of a dual active bridge (DAB) converter, belonging to the field of bidirectional DC-DC converters for energy storage in the field of power electronics. Background technique [0002] Energy storage systems have become the main support for devices such as microgrids and uninterruptible power supplies. Dual active bridge DC-DC converters have become the main circuit topology of bidirectional DC-DC converters in energy storage systems. figure 1 A typical dual active bridge DC-DC converter circuit topology is shown for which the present invention is directed. The energy storage DC-DC converter not only needs to achieve high-efficiency power conversion, but also needs to have a high dynamic response to quickly compensate the power difference between the power source and the load. [0003] The traditional dual active bridge DC-DC converter adopts a single ...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/3353
Inventor 郭志强李沫霖梅扬
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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