Optimization and improvement of ac resistance calculation method for multi-phase parallel-wiring cables  

作　　者：Yaojia ZHANG Li WANG Lexuan MENG 

机构地区：[1]Department of Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China [2]AC Systems,Power Grid Division,ABB,Stockholm 16254,Sweden

出　　处：《Chinese Journal of Aeronautics》2022年第3期356-366,共11页中国航空学报（英文版）

基　　金：co-supported by the National Natural Science Foundation of China(No.51877102);the Innovation Foundation of Jiangsu Province,China(No.KYLX16_0365。

摘　　要：Parallel-wiring cables are often used in multi-phase AC aircraft Electrical Power Systems(EPSs).However,it complicates the ac resistance estimation.To solve this issue,an analytical resistance calculation method for parallel-wiring cables in multi-phase EPS was proposed.Firstly,the existing calculation formula of proximity factor was optimized,and the calculation error was reduced from 16%to 2%when two conductors are close to each other.Afterwards,the superposition effect on current density distribution between multi-conductors was considered based on orthogonal decomposition method,and the position of the equivalent charged points were easily determined.Finally,the ac resistance calculation formula was derived according to characteristics of parallel-wiring strategy,and the general ac resistance calculation methods of multi-phase parallel-wiring cables were presented.The proposed approach considerably enhances the applicability of ac resistance analytical calculation method for multi-conductor cables.Thanks to the accuracy of the proposed method,it can be used in many cases to avoid case-by-case simulation work and facilitate efficient system design and analysis.

关 键 词：AC resistance Main feeder Orthogonal decomposition Parallel-wiring strategy Proximity effect 

分 类 号：V242[航空宇航科学与技术—飞行器设计]