Comprehensive Evaluation Of Power Quality Of Commercial Airliner Power System

In the past 30 years,with the accelerated development of the aviation industry,the application of a large number of non-linear components in the aircraft have seriously affected the power quality of the aircraft power grid,and the power quality of the aircraft is critical to the stable operation of the aircraft power system.Therefore,in-depth study of the comprehensive evaluation method of the power quality of the aircraft AC and DC power system is of great significance for the monitor and maintenance of the aircraft power system and the improvement of the safety and economy of aircraft operation.In order to achieve the goal of reasonable evaluation of aircraft AC and DC power quality,this paper makes a comprehensive evaluation of the AC and DC power quality of specific aircraft power grids on the basis of reference to the general aircraft electrical system characteristic standards.Aiming at aircraft AC power quality,this research proposes a comprehensive evaluation method for aircraft AC power quality based on rough set theory.The evaluation results show that the scoring and ranking results of aircraft AC power quality obtained in this paper are in good agreement with the results obtained by other methods,verifying the effectiveness of this method and can accurately reflect the operating status of the aircraft’s 115V/400 Hz AC power system.Aiming at the aircraft DC power quality,this research proposes a comprehensive evaluation method for DC power quality based on the combination of analytic hierarchy process and gray correlation.The evaluation results show that the evaluation results of the DC power quality of the busbar obtained in this paper are consistent with the results of the original literature,and the separation of power quality levels is improved.The evaluation results are simple and clear,which proves the effectiveness of the method.And it provides a reference template for the comprehensive evaluation of future aircraft DC power quality.In summary,in this study,we set up a multi-pulse autotransformer rectifier(ATRU)experimental platform and conducted experiments to obtain DC power quality data under different loads.The evaluation method based on the combination of combining analytic hierarchy process and gray correlation degree is used to evaluate the acquired data.It is verified that the higher the load,the worse the DC power quality,which proves the feasibility of the method.