Calculation Methodology of Stray Current for Ungrounded DC Traction Systems

• Main Authors: YU-FONG SIAO, 蕭宇峰
• Other Authors: Bih-Yuan Ku
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/mup2zz

碩士 === 國立臺北科技大學 === 電機工程系所 === 106 === Stray current is a major issue of the DC traction system. Because the corrosion of stray current will be a great impact to metallic objects that surrounding around the system. So, there is an important mission to find an accurate model to simulate the rail of DC traction systems. To help use estimation the amount of stray current. Nowadays the calculation of stray currents generally rely on computer software. But when we want to evaluating the stray currents for the overall system. It well takes a lot of time to build a large simulation model, and such a large simulation model is also a heavy burden to regular PC. Therefore, it is necessary made me to found a way to calculate the exact stray current by mathematical analysis not by computer software. And to keep times from building simulation model of the DC traction. In this paper, we are focus on the ungrounded systems because it have excellent suppression for stray current leakage. To searching and analyze the track structure and the leakage path of ungrounded system. And based on this search to derive the calculation method of the stray current in ungrounded DC traction systems. And then compare the method with simulation software like MATLAB(SIMULINK¬–SimPower) to verified the reliability and accuracy.