Current sharing performance evaluation method based on infinite norm of current sharing deviation expected matrix for parallel power supply system

Abstract

The invention relates to a current sharing performance evaluation method based on an infinite norm of a current sharing deviation expected matrix for a parallel power supply system. The method comprises the step of constructing an expected matrix of a deviation between an actual current value and an expected current sharing value of a power supply module of the parallel power supply system under different load conditions (including a light load, a half load, a rated load and an overload) to calculate the infinite norm of the expected matrix and evaluate the magnitude of the current sharing performance of the parallel power supply system according to the infinite norm. According to the method, by the construction of the expected matrix A=(Emi)Nt*U of the relative current sharing deviation under various load conditions and the calculation of the infinite norm of the A=(Emi)Nt*U, the norm determines the sequential number of a module with the lowest current sharing performance in the parallel power supply system and quantitatively determines the lowest value of the current sharing performance, so that a basis is provided for the optimal design of the current sharing performance of the power supply module. By the design of a maximum allowable boundary value sigma, the method can quickly judge whether the current sharing performance of all the modules in the parallel power supply system is qualified.

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 ∞ norm of the current sharing deviation expectation matrix, which is used for evaluating the current sharing performance of the parallel power supply system. The method is also applicable to the evaluation of the current sharing performance of other electronic equipment in parallel operation. 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 tech...

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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.

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