A current sharing control method and a power parallel system applying the method
A flow control and parallel technology, applied in the field of power supply, can solve the problems of high bit error rate, poor communication delay system reliability, slow communication rate, etc., to achieve the effect of reducing bit error rate, improving performance and reliability, and reducing communication delay
Active Publication Date: 2016-03-02
HUAWEI DIGITAL POWER TECH CO LTD
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[0007] In view of this, the embodiment of the present application provides a current sharing control method and a power parallel system using the method to solve the communication delay and poor system reliability existing in the prior art due to high bit error rate and slower communication rate. The problem
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[0065] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0066] An example:
[0067] figure 1 A schematic structural diagram of a power parallel system provided in an embodiment of the present application.
[0068] The power parallel system provided by the embodiment itself may include multiple racks, such as figure 1 As shown, the power parallel system in the figure includes three racks 1, ...
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The invention discloses an average current control method and a power parallel system using the average current control method. The method comprises the following steps of: collecting total current of frames, and number of single-power modules in each frame and sending the collected total current and the number of the single-power modules to a first bus; receiving the total current of all the frames and the number of the single-power modules of all the frames on the first bus and calculating average current of the single-power modules of all the frames according to the total current of all the frames and the number of the single-power modules of all the frames; collecting output voltage and command voltage of the frames, and using the output voltage, the command voltage and the average current to generate a current command; and controlling a plurality of single-power modules in the frames to carry out average-current output by utilizing the current command. According to the invention, the communication among the frames and the communication in the frames are mutually independent, so that the communication delay in the control process is reduced and the performance and reliability of the system are enhanced.
Description
technical field [0001] The present application relates to the technical field of power supplies, in particular to a current sharing control method and a power parallel system applying the method. Background technique [0002] With the improvement of the single capacity level of power electronic equipment, the number of parallel power electronic equipment with parallel structure is increasing. In order to realize the current sharing control between modules, interconnection lines are usually used to exchange data between modules to achieve good performance. Current sharing effect. With the gradual increase in parallel capacity requirements, the number of parallel modules is increasing, which makes the wiring of the traditional interconnected parallel system complex. The data exchange of the system leads to an excessive amount of system data transmission, and the requirements for parallel signal transmission are becoming more and more stringent. Parallel mode and algorithms h...
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IPC IPC(8): G05B19/418H04L1/00
CPCY02P90/02
Inventor 舒畅
Owner HUAWEI DIGITAL POWER TECH CO LTD