{"title":"Coordination between supply power converters and contactors for fault protection in multi-terminal MVDC distribution systems","authors":"P. Cairoli, R. Dougal, K. Lentijo","doi":"10.1109/ESTS.2013.6523782","DOIUrl":"https://doi.org/10.1109/ESTS.2013.6523782","url":null,"abstract":"We present a fast and effective method for detecting and isolating faults in multi-terminal medium voltage dc shipboard power distribution systems. This new detection method permits coordination between the power supply converters and a set of bus segmentizing contactors without requiring fast communication between the elements. The power converters go into current-limiting mode as soon they recognize a fault condition and the segmentizing contactors autonomously decide whether or not to open based on local interpretation of time-to-trip curves as functions of apparent circuit resistance. This method allows converters and contactors to use only local measurements when deciding whether or not to trip in order to isolate the faulted section (later fine tuning can rely on communications). Simulation and experimental results show that faults can be isolated within 10 to 20 ms and the system can be re-energized within 40 to 60 ms.","PeriodicalId":119318,"journal":{"name":"2013 IEEE Electric Ship Technologies Symposium (ESTS)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125429621","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":"Co-simulation of a marine electrical power system using PowerFactory and MATLAB/Simulink","authors":"X. Kong, Xiaoxiao Yu, R. Chan, M. Lee","doi":"10.1109/ESTS.2013.6523712","DOIUrl":"https://doi.org/10.1109/ESTS.2013.6523712","url":null,"abstract":"In this work, an approach to co-simulate a marine electrical power system is set forth using PowerFactory and MATLAB/Simulink. Although MATLAB/Simulink is one of the well-known simulation tools to design and simulate marine power modules, it lacks the features for comprehensive power system analysis, which are offered by PowerFactory. In this paper, a methodology is proposed to map the MATLAB/Simulink power system module model as an object in PowerFactory environment. This approach offers the benefits of exploiting the features of both platforms as well as the potential reduction in development time and costs by recycling available models.","PeriodicalId":119318,"journal":{"name":"2013 IEEE Electric Ship Technologies Symposium (ESTS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128486132","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":"Wide bandwidth system identification of MVDC distribution system by applying perturbations to an existing converter","authors":"J. Siegers, E. Santi, A. Barkley","doi":"10.1109/ESTS.2013.6523772","DOIUrl":"https://doi.org/10.1109/ESTS.2013.6523772","url":null,"abstract":"This paper presents a digital network analyzer technique to actively monitor the proposed MVDC distribution system for the US Navy's all-electric ship by using the existing power electronic converters to make wideband measurements of small-signal transfer functions and system impedances. The converters themselves become the excitation source and analysis tool for detecting changes in converter dynamics and impedances. This information can be used for fault detection and localization, stability and performance improvement using adaptive control, and for distributed control. The correlation-based analysis is examined in its application for obtaining several converter-level and system-level terminal characteristics. A scheme for an adaptive control platform is described that is able to correct for multiple converter system changes using the information-rich frequency response data obtained through the identification procedure. Simulation results are provided for several realistic scenarios, in which targeted control adaptation prevents system instability and improves performance.","PeriodicalId":119318,"journal":{"name":"2013 IEEE Electric Ship Technologies Symposium (ESTS)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129439220","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":"Modular Multilevel Converter for propulsion system of electric ships","authors":"M. Spichartz, V. Staudt, A. Steimel","doi":"10.1109/ESTS.2013.6523740","DOIUrl":"https://doi.org/10.1109/ESTS.2013.6523740","url":null,"abstract":"The choice of the converter topology feeding the electric machine of the main propulsion of electric ships plays an important role for the feasibility of an all electric ship concept. The medium-voltage machine has to be speed-adjustable in the whole speed range at high power and maybe it is connected by a long cable to the inverter. In other high power industrial drives with long cable length, e.g. in fan motor drives in underground mines, overvoltages at the machine terminals are observed, resulting in premature motor insulation failure. For that reason a multilevel topology for the used converter is indispensable. State of the art are multilevel converters as Diode-Clamped Converter, Imbricated-Cell Converter or Stacked H-Bridge Converter with a low number of levels limited by the restrictions in practical construction. In contrast the Modular Multilevel Converter allows a nearly unlimited cascading of its sub-modules and therewith of voltage levels at the same complexity in construction. The challenge of using this topology as drive converter is the AC fluctuation of the sub-module voltages rising with sinking output frequency, controllable only by special control schemes and by a special load characteristic of the machine. This paper shows the dimensioning of a 17-level Modular Multilevel Converter feeding a SIEMENS H-COMPACT PLUS 3.9-MW 4.16-kV machine. The advantages and the challenges of the modular multilevel topology are presented and a characteristic diagram of the drive is shown. Simulation results document the chosen control strategies in the full operation range.","PeriodicalId":119318,"journal":{"name":"2013 IEEE Electric Ship Technologies Symposium (ESTS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114902878","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}
R. Bartelt, D. Meyer, C. Heising, Y. Khimchenko, V. Staudt
{"title":"Simulation of large-scale electric-ship DC-grids using the simulation tool VIAvento","authors":"R. Bartelt, D. Meyer, C. Heising, Y. Khimchenko, V. Staudt","doi":"10.1109/ests.2013.6523745","DOIUrl":"https://doi.org/10.1109/ests.2013.6523745","url":null,"abstract":"DC-ship grids are converter-dominated grids where the overall stability very strongly depends on the controls of the involved converters. Due to the non-linear structure of the control algorithms, a realistic stability assessment can only be achieved in time domain. To avoid non-realistic simulation results, a holistic model of the overall system including continuous and discrete elements and their original control algorithms has to be generated. Within this paper, the modelling approach for power-electronic devices including their non-ideal characteristics in time domain in the new simulation tool VIAvento is presented. The non-ideal characteristics are described briefly and the capability of this approach is demonstrated with simulation results of a DC grid with several independent converters in multi-level topology. Additionally, results of a resonant converter for lower power are given.","PeriodicalId":119318,"journal":{"name":"2013 IEEE Electric Ship Technologies Symposium (ESTS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130920086","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}