Computers in Railways XVI : Railway Engineering Design and Operation最新文献

{"title":"ADJUSTMENT OF THE CHARGE–DISCHARGE PARAMETERS OF A STATIONARY ENERGY STORAGE SYSTEM FOR DC ELECTRIC RAILWAYS USING PI CONTROL","authors":"Y. Nakamata, R. Takagi","doi":"10.2495/CR180051","DOIUrl":"https://doi.org/10.2495/CR180051","url":null,"abstract":"Recent years have seen the introduction of stationary energy storage systems (SESSs) to mitigate the following problems commonly observed in DC traction power supply networks, namely: (1) the occasional loss of line receptivity for the regenerative trains when there is not enough load within the power supply network; and (2) the drop of line voltage when the traction load is too high. Commonly the charge and discharge current of an SESS is controlled using I-V characteristic controller, which determines the current depending on the terminal voltage of the SESS. However, it is known that it is a very difficult task to adjust threshold voltages such as charge start voltage. Thus, the authors propose a new approach to the determination of the voltage parameters using the PI controllers. In this research, we propose a method to adjust voltage thresholds using PI control and control method of SOE (State of Energy) to arbitrary value. Then, we propose two methods for controlling RMS current at the same time as the SOE, and we present the results of the simulation-based analyses of the proposed approach.","PeriodicalId":210834,"journal":{"name":"Computers in Railways XVI : Railway Engineering Design and Operation","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127094378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A DESIGN STRATEGY ON THE TALBOT TYPE ARTICULATION OF A FREIGHT WAGON","authors":"E. Sunbuloglu, E. Bozdag","doi":"10.2495/CR180131","DOIUrl":"https://doi.org/10.2495/CR180131","url":null,"abstract":"The Talbot Type Articulation is a classical design for use in articulated freight wagons, where one bogie under the coupler serves to both sides coupled. Though being a traditional design, lighter weight wagons designed to transport bulky but lightweight materials return it to one of the alternatives to increase load-to-tare ratio. However, the design criteria of the Couplers are not clearly defined in TSI and recalled standards, but simply recalled to be stronger than other coupling means at ends. This fact requires other challenges of loading case reviews, since the coupling is acting both in tensile and compressive loads, and it is the means of generating the intermediate joint. To end up with a design, a way of generating the possible load cases and combining these into the scope of the DVS fatigue code for fatigue assessment is presented in this study, along with experimental verification of the model.","PeriodicalId":210834,"journal":{"name":"Computers in Railways XVI : Railway Engineering Design and Operation","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130751877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TRAIN RESCHEDULING GENERATION CONSIDERING ROLLING STOCK TYPES AND CLOSED-OFF AREAS","authors":"T. Katori, T. Izumi","doi":"10.2495/CR180381","DOIUrl":"https://doi.org/10.2495/CR180381","url":null,"abstract":"During railway operations, trains cannot operate on a scheduled timetable when a traffic accident happens. In such a case, exact re-operation time must be predicted and a rescheduling timetable after re-operation has to be generated quickly. Rescheduling timetables have been generated by manual operators. However, recently high-performance computers have also generated rescheduling timetables automatically. When a traffic accident happens, there are two main rescheduling plans considering traffic features on the tracks and infrastructure (for example, possible locations for a turning operation). In one plan, all tracks are closed and all trains re-started at the same time. In the second plan, the closed-off area is limited to only one part, and in other areas trains can run turning back operations. This rescheduling applies to where many trains run turning operations, and this type of rescheduling has the merit of continued traffic. Against this background, we are studying the automatic generation of rescheduling timetables. In Japanese urban areas, JR and some private company trains (rolling stocks) run through each other for passenger convenience, but the rolling stocks have limited running areas. For example, an area is operated by directory current rolling stock, but another area is powered by alternative current or diesel rolling stock operation. In this paper, we propose an improved rescheduling generation method that includes the closed-off area while also considering the rolling stock types. The generated rescheduling timetable includes turning operations in certain areas. With this method, a pausing time is set for each rolling stock, and other trains’ paths may not cross the accident location. Of course, if the same pausing time is set for all trains, a rescheduling plan will be generated. Generated rescheduling plans are evaluated for passenger convenience; average headway time at each station for other directions and standard deviation time are evaluated. Shorter average headway time leads to larger transportation numbers, and smaller standard deviation means a more even passenger distribution for all trains. This method is applied to two scheduled timetables on a modelled double track line. Some rescheduling results are compared with different parameters. Generated rescheduled timetables include turning back operation.","PeriodicalId":210834,"journal":{"name":"Computers in Railways XVI : Railway Engineering Design and Operation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124305509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE IMPACT OF BUFFER TIME DISTRIBUTIONS ON THE NOMINAL CAPACITY OF RAILWAY LINES","authors":"Stephan Zieger, N. Weik, Nils Nießen","doi":"10.2495/CR180281","DOIUrl":"https://doi.org/10.2495/CR180281","url":null,"abstract":"Buffer times are essential for preventing delay propagation and ensuring robustness in railway timetabling. While robustness analysis deals with ensuring the effectiveness of allocated buffer times in schedules, the number of trains is generally assumed to be fixed. The feasibility of the train operation concept needs to be checked by strategic long-term capacity planning beforehand. Capacity analysis methods depend on buffer times and involve some sort of delay prognosis. The goal of the present paper is to analyse the effects of buffer time distributions on nominal capacity obtained with stochastic (analytic) capacity analysis approaches. Complementing previous work where Monte-Carlo simulation had been applied, it is shown how convolution integrals arising in analytic delay propagation models can be explicitly calculated using moment generating functions. Based on this approach, a generalisation of the STRELE framework, which is the standard methodology of German infrastructure manager DB Netz AG for capacity analysis of railway lines, is derived and the effects of different buffer time distributions on nominal capacity are studied.","PeriodicalId":210834,"journal":{"name":"Computers in Railways XVI : Railway Engineering Design and Operation","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128176973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MULTIPLE PR CONTROLLER-BASED METHOD FOR SUPPRESSING THE RESONANCE OSCILLATION OF TRACTION NETWORKS USING THE AUXILIARY CONVERTER OF AN ELECTRIC LOCOMOTIVE","authors":"Meijun Mu, Shihui Liu, F. Lin, Zhongping Yang, Runze Zhang","doi":"10.2495/CR180071","DOIUrl":"https://doi.org/10.2495/CR180071","url":null,"abstract":"With the extensive application of AC drive technology, the content and times of harmonics injected into the traction network are increasingly diversified, leading to resonance accidents, especially for the harmonics of integer multiples with switching frequencies caused by AC drive technology. When the resonance occurs, the train terminal coupling over-voltage would lead to the breakdown of power supply equipment, which will affect the normal operation of the train. In order to restrain the traction network resonance, this paper analyses the resonance mechanism and proposes an improved method by using a locomotive auxiliary converter. The scheme introduces the active filter function into the fourquadrant converter control in the auxiliary power supply. Thus, in addition to the filter function, the auxiliary converter is designed to produce a compensation current by detecting the primary side current, extracting harmonic current using DFT analysis and tracking the reference current using zero-error multiple PR(M-PR) controller. Under this condition, the harmonic current value of primary side would be eliminated to almost zero and the resonance would be suppressed. The results are verified by Matlab/Simulink simulation and experiments on RT-LAB platform.","PeriodicalId":210834,"journal":{"name":"Computers in Railways XVI : Railway Engineering Design and Operation","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127365348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}