Pub Date : 2013-04-22DOI: 10.1109/ESTS.2013.6523782
P. Cairoli, R. Dougal, K. Lentijo
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.
{"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}
Pub Date : 2013-04-22DOI: 10.1109/ESTS.2013.6523712
X. Kong, Xiaoxiao Yu, R. Chan, M. Lee
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.
{"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}
Pub Date : 2013-04-22DOI: 10.1109/ESTS.2013.6523772
J. Siegers, E. Santi, A. Barkley
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.
{"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}
Pub Date : 2013-04-22DOI: 10.1109/ESTS.2013.6523740
M. Spichartz, V. Staudt, A. Steimel
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.
为电动船舶主推进电机供电的变换器拓扑的选择对全电动船舶概念的可行性起着重要的作用。中压机必须在高功率下在整个速度范围内可调速，并且可能通过长电缆连接到逆变器上。在其他电缆长度较长的大功率工业驱动器中，例如在地下矿山的风扇电机驱动器中，观察到机器端子处的过电压，导致电机绝缘过早失效。因此，所使用的转换器的多电平拓扑是必不可少的。目前的多电平变换器有二极管箝位变换器、叠片单元变换器或堆叠h桥变换器等，由于实际结构的限制，电平数较低。相比之下，模块化多电平变换器允许其子模块几乎无限级联，从而在相同的结构复杂性的电压电平。使用这种拓扑作为驱动变换器的挑战是子模块电压的交流波动随着输出频率的下降而上升，只能通过特殊的控制方案和机器的特殊负载特性来控制。本文给出了西门子H-COMPACT PLUS 3.9 mw 4.16 kv电机的17电平模块化多电平变换器的尺寸。介绍了模块化多电平拓扑的优点和面临的挑战，并给出了该驱动器的特性图。仿真结果证明了在全工作范围内所选择的控制策略。
{"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}
Pub Date : 1900-01-01DOI: 10.1109/ests.2013.6523745
R. Bartelt, D. Meyer, C. Heising, Y. Khimchenko, V. Staudt
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.
{"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}
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