【正文】 與 di/dt+△ I 保護(hù)參數(shù)予以整定計(jì)算，并對(duì)部分保護(hù)的配合使用作了分析。 analyzed and calculated according to the characteristics of urban rail transit traction transformers and traction work parameters, and the establishment of a unilateral forequivalent circuit model in the electricity and bilateral power supply, given the formula and an example of the steadystate current in the power supply. Secondly, this article were made by the different shortcircuit fault this paper, the Matlab / Simulink tool widely used in urban rail transit DC power supply system 12 pulse, 24 pulse DC power supply system modeling and simulation,Subway DC traction substation 12/24 pulse rectifier unit simulation model, and analysis the harmonic content of the 12/24 pulse rectifier unit load,and obtained 24 pulse rectifier unit 12 pulserectifier unit 11, 13 times harmonic suppression the basis of the model, DC1500V contact wirepowered subway line under different fault shortcircuit fault simulation was analyzed. As not a substation supply line shortcircuit fault current, but across the board is connected to the substation supply shortcircuit current. More accurately reflect the shortcircuit current conditions this paper consider four bilateral electricity substation supply model, and analysis the difference between shortcircuit fault simulation variation proximal short circuit and remote shortcircuit shortcircuit of precision parameter calculation, modeling, will have a huge impact on rate of rise and amplitude shortcircuit current drawn simulation. To better grasp the changes shortcircuit current conditions, the article simulation parameters DCside shortcircuit current. Finally, this paper bined with the actual operation subway, the subway lootive using straightline traction motor start the fault reclesing transient current to simulation analysis, bined with given current trip protection and di/dt+△ I protect the two majorprotection setting principles for the current trip protection and di /dt + △ I protection parameters be setting calculation, with the use and protection were analyzed. Keywords: DC traction power supply system。 24 Pulsereetifier。 DC protection。 Current incremental protection 目錄 2 目錄 第 1 章 緒 論 ............................................................................................... 1 課題研究的背景及意義 ....................................................................... 1 課題研究現(xiàn)狀 ...................................................................................... 1 本文主要研究?jī)?nèi)容 ............................................................................... 2 第 2 章 直流牽引供電系統(tǒng) ............................................................................... 4 牽引變電所 ........................................................................................... 5 6脈波整流電路 ........................................................................ 5 12脈波整流電路 ....................................................................... 5 24脈波整流電路 ....................................................................... 6 直流牽引供電系統(tǒng)諧波分析 ..................................................... 6 牽引網(wǎng) .................................................................................................. 7 直流供電保護(hù)系統(tǒng) ................................................................................ 8 本章小結(jié) .............................................................................................. 8 第 3 章 直流短路計(jì)算 ...................................................................................... 9 直流短路介紹 ....................................................................................... 9 參數(shù)計(jì)算 ............................................................................................... 9 .................................................................................. 9 .................................................................................10 短路電流計(jì)算 ...................................................................................... 11 ............................................................................. 11 .............................................................................18 目錄 3 本章小結(jié) .............................................................................................18 第 4 章 直流短路故障仿真模型 ......................................................................19 12 脈波牽引整流供電電路仿真模型 ...............................................19 12脈波整流電路仿真 模型 .......................................................19 6脈波整流電路空載分析 ........................................................19 12脈波整流電路空載分析 .......................................................20 24 脈波牽引整流供電電路仿 真模型 ...............................................22 24脈波整流電路仿真模型 .......................................................22 24脈波整流電路空載分析 .......................................................23 12/24 脈波整流供電電 路帶負(fù)載仿真比較 ........................................24 24 脈波牽引供電整流電路短路故障仿真 .........................................26 不同點(diǎn)短路故障仿真 ...............................................................27 多座變電 站影響的短路故障仿真模型 .....................................29 直流側(cè)參數(shù)對(duì)短路電流的影響 .........................................................32 短路故障沖擊電流仿真 ....................................................................34 機(jī)車啟動(dòng)仿真 ...................................................................................36 機(jī)車啟動(dòng)電路模型 ...................................................................36 機(jī)車啟動(dòng)仿真模型 ...................................................................36 本章小結(jié) ...........................................................................................38 第 5 章 直流牽引供電系統(tǒng)保護(hù) ....................................................................39 地鐵牽引供電系統(tǒng)保護(hù)概述 ..........................................