Evaluation Method of Current Sharing Performance of Parallel Power Supply System Based on ∞ Norm of Current Sharing Standard Deviation Matrix
A technology of power supply system and evaluation method, which is applied in the direction of AC/DC network circuit layout, electrical components, circuit devices, etc., can solve the problems such as the evaluation method of current sharing performance of parallel power supply system that has not yet been found, and achieves fast calculation speed, wide applicability, The effect of improving longevity and reliability
Inactive Publication Date: 2018-08-07
WENZHOU UNIV
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[0004] However, searching existing papers and patents shows that a scientific, reliable, comprehensive and practical method for evaluating the current sharing performance of parallel power supply systems has not been found, but there is a parallel operation evaluation based on droop parameters in the inverter power parallel operation system method
However, this method is used to adjust active power and reactive power, and is not suitable for current sharing performance evaluation of other parallel power supply systems.
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[0024] The following further describes the embodiments of the present invention with reference to the drawings:
[0025] The present invention provides a parallel power supply system current sharing performance evaluation method based on the current sharing standard deviation matrix ∞ norm, which is mainly based on the following standard deviation matrix of the relative deviation between the actual module current and the ideal reference current of the parallel power supply system under different load conditions ∞ Norm mathematical model: a simplified diagram of the parallel power supply system is as follows figure 1 As shown, it mainly includes upper computer (PC), program-controlled electronic load and power supply module. The main function of the upper computer (PC) is to obtain the module IP address and module output current, control the working current of the program-controlled electronic load, calculate the standard deviation matrix ∞ norm of current sharing and obtain the t...
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The invention discloses a method for evaluating the current-sharing performances of a parallel power supply system based on the infinity norm of a current-sharing standard deviation matrix. Through building a standard deviation matrix of an actual current value of a power module of a parallel system under different load conditions (light load, semi-load, rated load and overload) and an expected current-sharing value, the method calculates the infinity norm of the standard deviation matrix, and evaluates the current-sharing performance of the system according to the value of the infinity norm. Through building the current-sharing standard deviation matrix (shown in the description) under various load conditions and calculating the infinity norm of the matrix (shown in the description), the method evaluates the current-sharing performance of the system. The norm determines the serial number of a power module with the maximum relative overshoot of the current-sharing dynamic response in the parallel power supply system and quantitatively determines the maximum value of current-sharing relative overshoot, and provides a basis for the optimization and design of the current-sharing performance of the power module. Through setting the maximum allowed boundary value sigma<max>, the method can quickly determine whether the relative overshoot of the current-sharing dynamic response of the power module in the parallel power supply system is qualified or not.
Description
Technical field [0001] The invention relates to a current sharing performance evaluation method of a parallel power supply system based on the ∞ norm of a current sharing standard deviation matrix, which is used to evaluate the current sharing performance of the parallel power supply system. The method is also suitable for evaluating the current sharing performance of other electronic devices in parallel operation. Background technique [0002] High-power parallel power supply is a parallel output structure of multiple power modules. It has a series of advantages such as strong compatibility, N+m redundant backup, strong reliability, high cost performance, low design difficulty, and easy management. One of the preferred solutions for power output power supply design. Current sharing technology has become the core technology for parallel power supply of switching power supply modules. Current sharing technology means that when multiple power modules are powered in parallel, the l...
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IPC IPC(8): H02J4/00
CPCH02J4/00
Inventor 彭志辉
Owner WENZHOU UNIV