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Research on Simulation of Starting Diesel Engine of Locomotive with Super Capacitor

Author: YangJianXin
Tutor: WangYueMing
School: Southwest Jiaotong University
Course: Mechanical and Electronic Engineering
Keywords: The engine starts Large -capacity capacitor DC / DC converter Simulation
CLC: U262.11
Type: Master's thesis
Year: 2005
Downloads: 133
Quote: 0
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Abstract


Of Locomotive Diesel Engine start road vehicle engine start battery drag engine to achieve. And the battery is very easy to parameter changes by the impact of external factors, such as the internal resistance increases, the terminal voltage decreases, the capacity becomes smaller. In this case, start a low success rate, causing a lot of inconvenience to the people. In order to improve the success rate start and start the system performance and improve battery life, people have been looking for a variety of ways. With advances in technology in recent years, there has been a large-capacity capacitor. This new electronic device has a power density of more than 10 times higher than the battery and the charge-discharge rate of 100 times or more. This paper uses a large-capacity capacitor to improve the performance of diesel engine start system. Application of existing locomotive diesel engine start system before and after the performance of the large-capacity capacitor research and quantitative analysis. A large part of the energy remaining in the discharge end because the large-capacity capacitor terminal voltage is equal to the battery terminal voltage at the time, so also. In order to make full use of the energy of this part, we tried the use of DC / DC converter, the output of the energy stored in the large-capacity capacitor outwardly after upconverting. In this process to find a powerful tool to solve similar problems: the Simulink toolbox Simpowersystems module. This article the Dongfeng 4-type diesel locomotive, for example, by the start of the rolling stock diesel principle, process, large capacity capacitor in the start of the diesel engine vehicle and step-up DC / DC converter works in Matlab inside simulation model, the following conclusions: 1) large-capacity capacitor after application of the existing diesel locomotive diesel engine start system can greatly improve the performance of the system: the most low-end voltage can improve battery startup; can greatly reduce the start the maximum discharge current of the battery. Which can effectively protect the battery and prolong battery life. 2) large capacity capacitor significantly improve the success rate of start. 3) large-capacity capacitor applications in existing diesel locomotive start system capacity is 60F. 4) large capacity capacitor, compared to the capacity of the battery with the original capacity can be reduced by about 40%. 5) the use of a DC / DC converter, the large-capacity capacitor discharge efficiency increased from 65% to 94%, we use large-capacity capacitor energy storage. Battery

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CLC: > Transportation > Rail transport > Locomotive works > Diesel locomotive > Power plant > Diesel engine
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