Parallel operation control method and device and parallel operation system
A control method and control device technology, applied in the direction of circuit devices, battery circuit devices, output power conversion devices, etc., can solve the problems that affect the flow rate of parallel systems and cannot effectively suppress DC circulating currents, etc., to achieve the suppression of DC circulating currents , to achieve the effect of flow control
Pending Publication Date: 2022-02-18
KEHUA DATA CO LTD +1
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Problems solved by technology
[0004] The purpose of the present invention is to provide a parallel control method and device, and a parallel system to solve the problem that in the prior art, in some scenarios where the zero point equipotential cannot be guaranteed, the DC circulating current cannot be effectively suppressed, thereby affecting the current sharing of the parallel system degree of question
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[0039] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
[0040] In order to make the purpose, technical solution and advantages of the present invention clearer, specific embodiments will be described below in conjunction with the accompanying drawings.
[0041] Please refer to figure 1 , figure 1 A schematic flowchart of a parallel control method provided by an embodiment of the present invention, the parallel control method is applied to each switch...
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The invention provides a parallel operation control method and device and a parallel operation system, the method is applied to each switching power supply circuit in the parallel operation system, and the parallel operation system is composed of at least two switching power supply circuits which are connected in parallel; the method comprises the following steps: acquiring a voltage direct-current component of a local switching power supply circuit, and determining a voltage direct-current component error based on the voltage direct-current component and a preset voltage direct-current component reference value; obtaining a current direct-current component of each switching power supply circuit, and determining a current direct-current component adjusting quantity of the switching power supply circuit based on the current direct-current component of each switching power supply circuit; based on the voltage direct-current component error and the current direct-current component adjusting quantity, determining the reference phase voltage adjusting quantity of the local switching power supply circuit; and according to the reference phase voltage adjusting quantity, adjusting a preset reference phase voltage of the local machine, and based on the adjusted reference phase voltage, carrying out current sharing control on the local machine switching power supply circuit. According to the invention, direct current circulation can be effectively suppressed, and current sharing control can be better realized.
Description
technical field [0001] The invention belongs to the technical field of parallel machine control, and more specifically relates to a parallel machine control method and device, and a parallel machine system. Background technique [0002] In the field of switching power supplies, the parallel system has been widely used because it has higher reliability than a single system and is easy to expand the system. The key to the parallel operation of each switching power supply circuit is the distribution of load current. If the load current distribution is uneven, a circulating current will be generated between each switching power supply circuit, which will reduce the efficiency and reliability of the parallel system. Therefore, the current sharing control of the parallel system extremely important. Wherein, when performing the current sharing control of the parallel system, in addition to paying attention to the AC current sharing characteristics, it is also necessary to pay atte...
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IPC IPC(8): H02M1/00H02J7/34
CPCH02M1/00H02J7/34
Inventor 吴庆彬上官昌焜陈文佳
Owner KEHUA DATA CO LTD