Case Study on Railway Signalling and Power Supply Systems
| Autor: | Kuo-Chang Wu, 吳國彰 |
|---|---|
| Rok vydání: | 2014 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 102 This paper presents Taiwan High Speed Rail turnout control box damage caused by the lightning and Taipei MRT Mucha line third rail short circuit case analysis. The overhead ground wire of Taiwan High Speed Rail uses for shielding direct lightning. When the lightning strikes the overhead ground wire, the lightning current will flow at both upstream and downstream directions on the overhead ground wire and into the earth. The lightning surge not only causes the over-voltage in the overhead ground wire but also forms differences in a ground potential rise among the control equipment. As a result, these turnout control equipment are vulnerable to be damaged. From the above scenario, this thesis will survey effects of the lightning current on the turnout control box through the simulation software, namely, Alternative Transient Program (ATP). In addition, the following part of the thesis is to survey the Taipei MRT system supplied by a DC traction power source under short-circuit contingencies occurred at the third rail. In order to handle this problem, a DC fault current analysis has been performed due to the actual measurement data recorded. Moreover, three DC fault detection methods are proposed in the thesis to improve the operation of the MRT system. Consequently, instrumentation and control equipment in the MRT system can be effectively protected from the significant impacts of the DC short-circuit current. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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