直接供电方式及其回流网的技术指标分析

A TECHNICAL ANALYSIS ON THE DIRECT-FEEDING SYSTEM AND ITS CURRENT-RETURN NETWORK

本文运用长回路和短回路的概念,分析直接供电方式及其回流网的回路阻抗、回流率、屏蔽系数和系统压损等技术特性。特别对取得最大回流率提出了回流网的参数调整及空间布置的分析方法。计算结果和分析表明,优化布置与选择回流网是提高直供方式技术性能,并进而扩大其应用范围的有效途径。

With the use of the long-loop and the short-loop conceptspresented here, a number of technical indices such as the circuit im-pedance, current returning rate, screening coefficient and voltage loss ofthe direct-feeding system and its current-return network, together calledthe DN system,are analysed in this paper. Especially,aimed at maximizingthe current returning rate,a method of optimizing the parameter adjustmentand space arrangement of the current-return network (including thenegative feeding wires and tracks) is put forward. The calculationsindicate that optimizing the arrangement and selecting the current-return network are a very effective means for improving the technicalperformance and enlarging the application range of the direct-feedingsystem.