Method and system for evaluating high-voltage direct-current power supply system of multi-electric aircraft

Abstract

The invention relates to a method and a system for evaluating a high-voltage direct-current power supply system of a multi-electric aircraft. The evaluation method comprises the following steps: performing order reduction processing on an original small signal model, and determining an order reduction small signal model of the high-voltage direct-current power supply system of the multi-electric aircraft; initializing a convergence condition of the reduced-order small signal model; determining a reduced-order model target characteristic value according to the reduced-order small-signal model;determining a target eigenvalue error according to the reduced-order model target eigenvalue; determining an iterative deviation value according to the target characteristic value error; obtaining thecurrent iteration times; whether the iteration deviation value and the current iteration frequency meet the convergence condition or not is judged, if yes, the target characteristic value error is output, and the high-voltage direct-current power supply system of the multi-electric aircraft is evaluated according to the target characteristic value error. By adopting the evaluation method and system provided by the invention, repeated calling of the original small signal model can be avoided, and the evaluation efficiency of the stability of the high-voltage direct-current power supply systemof the multi-electric aircraft is improved.

Description

technical field [0001] The invention relates to the field of stability analysis of power electronic power conversion systems, in particular to an evaluation method and system for a high-voltage direct current power supply system of a multi-electric aircraft. Background technique [0002] In order to improve the energy efficiency, reliability and maintainability of aircraft and reduce environmental pollution, the concepts of All Electric Aircraft (AEA) and More Electric Aircraft (MEA) emerged in the aviation field in the 1970s. It is to replace conventional secondary energy such as hydraulic energy and pneumatic energy with electric energy to simplify the structure of the aircraft system and achieve overall optimization of technical and economic performance. It has become a symbolic development direction of modern aircraft, and low-voltage DC (low voltage direct current, LVDC), constant speed constant frequency (CSCF), variable speed constant frequency (VSCF), variable freque...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for evaluating the high-voltage DC power supply system of a multi-electric aircraft to solve the problem of low efficiency in evaluating the stability of the high-voltage DC power supply system of a multi-electric aircraft in the prior art

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