Evaluation Method for Current Sharing Performance of Parallel Power Supply System

Abstract

The invention relates to a parallel power supply system current sharing performance evaluation method based on the 1-norm of a current sharing standard deviation matrix. The standard deviation matrix of the actual current value of power modules and an expected current sharing value of a parallel power supply system under different load conditions is established, then the 1-norm of the standard deviation matrix is calculated, and the current sharing performance of the system is evaluated according to the value of the 1-norm, wherein the load conditions can include a light load, a half load, a rated load and an overload. According to the method, the current sharing standard deviation matrix under various load conditions is established, and the 1-norm ||A||1 of the current sharing standard deviation matrix is calculated; the norm represents the maximum value of the relative overshoot of the current sharing dynamic response process of the parallel power supply system and corresponding load current and provides a basis for parallel power supply optimization design; by setting the maximum allowable boundary value Sigmamax, whether the relative overshoot performance of the current sharing dynamic response process of the parallel power supply system is up to standard or not can be rapidly judged.

Description

technical field [0001] The invention relates to a method for evaluating the current sharing performance of a parallel power supply system based on the 1 norm of the current sharing standard deviation matrix, which is used for evaluating the current sharing performance of the parallel power supply system. Background technique [0002] The high-power parallel power supply system 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. It has become a solution One of the preferred solutions for high-power output power supply design. Current sharing technology has become the core technology for parallel power supply of switching power supply modules. The current sharing technology refers to that when multiple power modules are connected in parallel to supply power, the load current of each power module is evenl...

AI Technical Summary

Problems solved by technology

[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.

Images