Application No./Patent No.: 2016105287774 Application date: June 30, 2016.
Inventor/Designer: Peng Zhihui.
The invention relates to a method for evaluating current sharing performance of a parallel power supply system based on 2 norm of current sharing standard deviation matrix, which comprises the following steps: constructing a standard deviation matrix of actual current value and expected current sharing quality value of a power supply module of the parallel system under different load conditions (which can cover light load, half load, rated load and overload), then calculating the 2 norm of the standard deviation matrix, and evaluating the current sharing performance of the system according to the 2 norm value. According to the invention, a current sharing standard deviation matrix a = (sigma ma) under various load conditions is constructed, and 2 norm ||A||2 of a = (sigma mi) is calculated. This norm represents the distance between the relative overshoot and the ideal target (i.e., zero vector) in the current sharing dynamic response process of the parallel power supply system under all load conditions, and provides a basis for the optimal design of the parallel power supply. According to the invention, by setting the σmaximum allowable boundary value sigma max, whether the relative overshoot performance of the current sharing dynamic response process of the parallel power supply system is qualified or not can be quickly judged.
