外文翻譯---電力機(jī)車交-直分相裝置上產(chǎn)生電弧的仿真實(shí)驗(yàn)

1、附錄 A(原文)A Simulation of Arc Generation at AC-DC Neutral Section of Electric RailwayYoungsoo Han, Kyuhyoung ChoiAbstract--This paper provides an experimental and theoretical analysis of the arc discharges

2、 generated between contact wire and pantograph of high speed railway. A video-based arc detection device is installed on the KTX train, and arc discharges are measured for a 45.87km track section of high speed railway

3、in Korea. It is measured that the rate of contact loss is 0.3% which is lower than the regulated value of 1.0% for high speed train, and arc discharges induced by 21 small size contact losses and 6 medium size contact l

4、osses occur continuously along the track. The power of arc discharge between contact wire and pantograph is calculated as 9.0~22.5[kW] which is approximately one-hundredth of that of the arc discharges generated at the n

5、eutral section of contact wire. The results of the measurement and the analysis suppose that a study be followed to suppress arc discharges and contact wire damages for the safe operation of high speed railway.Index T

6、erms—Electric railway;arc discharge;contact loss;contact wire; pantograph;neutral section.I.NOMENCLATURES/S : Sub-Station of Electric RailwaySP : Sectioning PostSSP : Sub- Sectioning PostAT : Auto-TransformerTF : Tro

7、lley FeederAF : Auto- Transformer Feeder FPW : Fault Protective Wire NW : Neutral WireNS : Neutral Section CCTV: Closed Circuit TelevisionEMI: Electromagnetic Interference LAN: Local Area Network MCB: Main Circuit Breake

8、rKTX: Korea Train ExpressII.INTRODUCTION Catenary systems play a important role in supplying electric power without interruption to trains moving fast. The pantographs installed on train collect currents for traction

9、 while keeping in contact with the catenary system. Arc discharges occur The contact loss phenomena are classified into three groups according to their duration; small size, medium size and large size. Small size contact

10、 loss is induced by delicate vibration of pantograph,and continues for several tenths of a second. Medium size contact losses occur when trains pass through the uneven stiff point of the contact wire, and continues for

11、a second and below. Large size contact losses, continuing for several seconds,are induced by jumping movements of pantograph after passing through bracket supporting points of contact wire. Contact wires have several n

12、eutral sections insulated from other parts of contact wires,in other words dead sections,which divide the sections having different phases and different supply voltages such as AC 25,000[V] or DC 1,500[V].

13、 Trains should go into the neutral sections after making notch-off operation which breaks the train current by MCB, otherwise the train current is interrupted by the neutral section which result in a large arc discharge