Single-phase ac-dc converter energy storage control system
An energy storage control and converter technology, which is applied in the field of single-phase AC-DC converter energy storage control system, can solve the problems of sudden change in switching frequency, lower system reliability, and deterioration of system performance, so as to improve current waveform and internal The ring current square control amount, the effect of good control effect
Inactive Publication Date: 2016-08-17
SHANGHAI JIAOTONG UNIV
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[0006] [2] He Zhiyuan and Wei Wei. "Research on Directional 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 but receives disturbances and noises, which reduces the reliability of the system and even deteriorates the performance of the system
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[0050] 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.
[0051] Such as figure 1 As shown, this embodiment provides a single-phase AC-DC converter energy storage control system, including a control circuit 1 and a power circuit 2, wherein the control circuit 1 completes the direct energy control of the power circuit 2; the supporting power circuit 2 realizes Power conversion from single-phase AC voltage to one-way DC voltage, while completing grid-side power factor correction.
[0052] specifically:
[0053] The control circuit includes 18 circuit uni...
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The invention provides an energy storage control system for a single-phase alternating current-direct current (AC-DC) converter. The energy storage control system comprises a control circuit and a matched power circuit, wherein the control circuit implements direct energy control on a boost inductor and an electrolytic capacitor in the power circuit; the matched power circuit is a single-phase AC-DC converter circuit, so that power conversion from single-phase alternating-current voltage to one path of direct-current voltage is realized, and a grid side unity power factor is acquired; the control circuit comprises four square units, a voltage square outer ring unit, a current square inner ring unit, two amplitude limiting units, a carrier unit, a driving unit, a compensation unit, a phase locked loop (PLL) unit, two subtraction units, an addition unit, a multiplication unit, a comparison unit and a fundamental wave voltage unit. The energy storage control system supports single-phase AC-DC conversion with the maximum output power of 5kW and the grid side power factor of more than 0.99, and has the advantages of high response speed and reliable and stable operation.
Description
technical field [0001] The invention relates to a high power factor control circuit in the field of single-phase AC-DC converters, in particular to an energy storage control system for single-phase AC-DC converters. Background technique [0002] Single-phase active power factor corrector (APFC) is a single-phase AC-DC converter using a diode uncontrolled rectifier bridge. Its purpose is to obtain unit grid-side power factor and meet the relevant standards of harmonic current. Reduce the harm of grid side harmonic current. Single-phase active power factor correction technology has a variety of control strategies, such as traditional double-closed-loop control, follower control and single-cycle control, all of which have achieved good correction results. The single-phase active PFC with double closed-loop control has good power factor correction effect, but slow dynamic response and poor robustness. In principle, double closed-loop control requires a slow voltage outer loop ...
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IPC IPC(8): H02M7/06H02M1/42
CPCY02B70/10Y02P80/10
Inventor 赵维娜杨喜军
Owner SHANGHAI JIAOTONG UNIV