Pub Date : 2013-04-22DOI: 10.1109/ESTS.2013.6523766
A. Siddique, B. Barkat, M. Poshtan
This paper describes an alternate method for performing current measurement for protection of generators and motors, particularly in the oil and gas industry. This technique involves the use of Hall Effect sensors instead of the current transformer (CT) to measure and detect fault current and different wireless communication methods to send and receive the fault signal. The paper first analyzes and asses the risks associated with the use of a conventional CT and come up with test models to further support the use of Hall Effect sensors instead. Three case studies are presented describing the use of Hall Effect sensors as tools for diagnosing the problems with each potential wireless technology. The methods of wireless communication used are analog transmission and digital transmission. For analog transmission, the modulation techniques Amplitude Modulation (AM) and Frequency Modulation (FM) are tested. Comparative studies of cost related to existing and the proposed system have also been done.
{"title":"Smart electrical protection method for industries operations","authors":"A. Siddique, B. Barkat, M. Poshtan","doi":"10.1109/ESTS.2013.6523766","DOIUrl":"https://doi.org/10.1109/ESTS.2013.6523766","url":null,"abstract":"This paper describes an alternate method for performing current measurement for protection of generators and motors, particularly in the oil and gas industry. This technique involves the use of Hall Effect sensors instead of the current transformer (CT) to measure and detect fault current and different wireless communication methods to send and receive the fault signal. The paper first analyzes and asses the risks associated with the use of a conventional CT and come up with test models to further support the use of Hall Effect sensors instead. Three case studies are presented describing the use of Hall Effect sensors as tools for diagnosing the problems with each potential wireless technology. The methods of wireless communication used are analog transmission and digital transmission. For analog transmission, the modulation techniques Amplitude Modulation (AM) and Frequency Modulation (FM) are tested. Comparative studies of cost related to existing and the proposed system have also been done.","PeriodicalId":119318,"journal":{"name":"2013 IEEE Electric Ship Technologies Symposium (ESTS)","volume":"259 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":"123083694","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.2013.6523711
J. Ordonez, A. Rivera, S. Yang, D. Shah, D. Delgado, M. Coleman, E. Dilay, J. Vargas
This paper summarizes our current efforts on thermal management aspects of all-electric ships, including the analysis of incorporating combined cycle power plants, a study of thermal management strategies for the reduction of weight, the use of thermal anticipation strategies to handle dynamic loads, the thermal modeling and characterization of power electronic building blocks, and the system-level transient simulation of ship thermal loads.
{"title":"Thermal management aspects of all-electric ships","authors":"J. Ordonez, A. Rivera, S. Yang, D. Shah, D. Delgado, M. Coleman, E. Dilay, J. Vargas","doi":"10.1109/ESTS.2013.6523711","DOIUrl":"https://doi.org/10.1109/ESTS.2013.6523711","url":null,"abstract":"This paper summarizes our current efforts on thermal management aspects of all-electric ships, including the analysis of incorporating combined cycle power plants, a study of thermal management strategies for the reduction of weight, the use of thermal anticipation strategies to handle dynamic loads, the thermal modeling and characterization of power electronic building blocks, and the system-level transient simulation of ship thermal loads.","PeriodicalId":119318,"journal":{"name":"2013 IEEE Electric Ship Technologies Symposium (ESTS)","volume":"25 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":"127280621","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.2013.6523773
E. Thirunavukarasu, R. Fang, J. Khan, R. Dougal
In navy's future all-electric ship design, the gas turbine engine is dedicated to electrical power generation. The power is then sent to a common electrical bus for allocation to both propulsion and non-propulsion electrical loads. Thus the gas turbine engine is dynamically coupled with the electrical system, and even with the thermal system, which is usually critical for the electrical system design. It has becoming increasingly important to understand the interactions that exist between the operation of the engine and the behavior of the electrical and thermal systems. This paper presents a co-simulation approach for cross-disciplinary simulations. Such an approach is implemented by integrating a twin-shaft gas turbine model, with a power generation and distribution system, and a thermal system. In this study, the thermal system is mainly used to manage the heat generated by the power converters in the electrical system. This paper discusses potential interactions that could take place during a dynamic disturbance of the fuel flow to the gas turbine engine. Preliminary simulation results for the dynamics of gas turbine power generation, power redistribution between the electrical loads, temperatures of power converters are presented to demonstrate the modeling and simulation capability, as well as illustrating the opportunities for further research.
{"title":"Evaluation of gas turbine engine dynamic interaction with electrical and thermal system","authors":"E. Thirunavukarasu, R. Fang, J. Khan, R. Dougal","doi":"10.1109/ESTS.2013.6523773","DOIUrl":"https://doi.org/10.1109/ESTS.2013.6523773","url":null,"abstract":"In navy's future all-electric ship design, the gas turbine engine is dedicated to electrical power generation. The power is then sent to a common electrical bus for allocation to both propulsion and non-propulsion electrical loads. Thus the gas turbine engine is dynamically coupled with the electrical system, and even with the thermal system, which is usually critical for the electrical system design. It has becoming increasingly important to understand the interactions that exist between the operation of the engine and the behavior of the electrical and thermal systems. This paper presents a co-simulation approach for cross-disciplinary simulations. Such an approach is implemented by integrating a twin-shaft gas turbine model, with a power generation and distribution system, and a thermal system. In this study, the thermal system is mainly used to manage the heat generated by the power converters in the electrical system. This paper discusses potential interactions that could take place during a dynamic disturbance of the fuel flow to the gas turbine engine. Preliminary simulation results for the dynamics of gas turbine power generation, power redistribution between the electrical loads, temperatures of power converters are presented to demonstrate the modeling and simulation capability, as well as illustrating the opportunities for further research.","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":"125345431","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.2013.6523716
F. Uriarte, R. Hebner
To accelerate the simulation of microgrid behavior, a parallel power system solver is being developed. The solver (CEMSolver) aims to accelerate the simulation of large-scale shipboard power system models created in MATLAB/Simulink with the SimPowerSystems blockset. While speedups of 50x have been reported, there remains insufficient confidence in the simulation results. This paper presents a point-by-point comparison of the results produced by MATLAB/Simulink 2012a and in parallel by CEMSolver. A large shipboard power system model is used for the comparison. It is concluded that, while the results show differences related to integration methods, all reported measurements of instantaneous voltage and current waveforms are within reasonable agreement.
{"title":"Assessing confidence in parallel simulation results","authors":"F. Uriarte, R. Hebner","doi":"10.1109/ESTS.2013.6523716","DOIUrl":"https://doi.org/10.1109/ESTS.2013.6523716","url":null,"abstract":"To accelerate the simulation of microgrid behavior, a parallel power system solver is being developed. The solver (CEMSolver) aims to accelerate the simulation of large-scale shipboard power system models created in MATLAB/Simulink with the SimPowerSystems blockset. While speedups of 50x have been reported, there remains insufficient confidence in the simulation results. This paper presents a point-by-point comparison of the results produced by MATLAB/Simulink 2012a and in parallel by CEMSolver. A large shipboard power system model is used for the comparison. It is concluded that, while the results show differences related to integration methods, all reported measurements of instantaneous voltage and current waveforms are within reasonable agreement.","PeriodicalId":119318,"journal":{"name":"2013 IEEE Electric Ship Technologies Symposium (ESTS)","volume":"23 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":"115253371","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.2013.6523748
Yusheng Luo, S. Srivastava, M. Andrus, D. Cartes
The goal of the study in this paper is to analyze the impact of charging an energy storage supplying power to the pulsed power load in an integrated power system onboard a ship. The work in this paper focuses on developing a disturbance metrics based control scheme for maintaining the optimal balance between the rapidity of ES charging and meeting the power quality requirements, at the same time, for a Medium Voltage Direct Current (MVDC) based IPS.
{"title":"Application of distubance metrics for reducing impacts of energy storage charging in an MVDC based IPS","authors":"Yusheng Luo, S. Srivastava, M. Andrus, D. Cartes","doi":"10.1109/ESTS.2013.6523748","DOIUrl":"https://doi.org/10.1109/ESTS.2013.6523748","url":null,"abstract":"The goal of the study in this paper is to analyze the impact of charging an energy storage supplying power to the pulsed power load in an integrated power system onboard a ship. The work in this paper focuses on developing a disturbance metrics based control scheme for maintaining the optimal balance between the rapidity of ES charging and meeting the power quality requirements, at the same time, for a Medium Voltage Direct Current (MVDC) based IPS.","PeriodicalId":119318,"journal":{"name":"2013 IEEE Electric Ship Technologies Symposium (ESTS)","volume":"64 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":"115860455","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.2013.6523751
A. Vicenzutti, D. Bosich, G. Sulligoi
MVDC distribution systems are proving to be a very promising research topic, given the large number of studies proposed in the academia and in the navies worldwide. In this paper authors present some multi-machine MVDC distribution system architectures, exploiting and comparing a range of choices on the topic of voltage control. Three network topologies are presented and analyzed, applying a series of tests which include load connections and fault events. Considerations about engineering feasibility, control complexity, performance and possible improvements are given as conclusions.
{"title":"MVDC power system voltage control through feedback linearization technique: Application to different shipboard power conversion architectures","authors":"A. Vicenzutti, D. Bosich, G. Sulligoi","doi":"10.1109/ESTS.2013.6523751","DOIUrl":"https://doi.org/10.1109/ESTS.2013.6523751","url":null,"abstract":"MVDC distribution systems are proving to be a very promising research topic, given the large number of studies proposed in the academia and in the navies worldwide. In this paper authors present some multi-machine MVDC distribution system architectures, exploiting and comparing a range of choices on the topic of voltage control. Three network topologies are presented and analyzed, applying a series of tests which include load connections and fault events. Considerations about engineering feasibility, control complexity, performance and possible improvements are given as conclusions.","PeriodicalId":119318,"journal":{"name":"2013 IEEE Electric Ship Technologies Symposium (ESTS)","volume":"52 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":"134042434","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.2013.6523749
Huaxi Zheng, R. Dougal, M. Ali
The large-signal transient stability of generators running at frequencies higher than the usual 50 or 60 Hz was investigated as a function of system frequency in a micro-grid setting. A three phase bolted fault was taken as the mechanism for inciting potential instabilities. Simple rotor angle analysis leads one to believe that higher frequency power systems are inherently more unstable than lower frequency systems, and this point is substantiated by critical clearing time (CCT) tests. But more extensive simulation-based analyses paint a different picture: if circuit breaker speed can be increased proportionally to the increase of system frequency (e.g. opening after some number of cycles, irrespective of the frequency of those cycles), then higher frequency systems can have better stability than lower frequency systems. Conversely, if circuit breaker speed cannot be increased proportionally to system frequency, then higher frequency systems might present worse stability if no other method for improving system stability is implemented.
{"title":"Transient stability of high frequency AC power systems","authors":"Huaxi Zheng, R. Dougal, M. Ali","doi":"10.1109/ESTS.2013.6523749","DOIUrl":"https://doi.org/10.1109/ESTS.2013.6523749","url":null,"abstract":"The large-signal transient stability of generators running at frequencies higher than the usual 50 or 60 Hz was investigated as a function of system frequency in a micro-grid setting. A three phase bolted fault was taken as the mechanism for inciting potential instabilities. Simple rotor angle analysis leads one to believe that higher frequency power systems are inherently more unstable than lower frequency systems, and this point is substantiated by critical clearing time (CCT) tests. But more extensive simulation-based analyses paint a different picture: if circuit breaker speed can be increased proportionally to the increase of system frequency (e.g. opening after some number of cycles, irrespective of the frequency of those cycles), then higher frequency systems can have better stability than lower frequency systems. Conversely, if circuit breaker speed cannot be increased proportionally to system frequency, then higher frequency systems might present worse stability if no other method for improving system stability is implemented.","PeriodicalId":119318,"journal":{"name":"2013 IEEE Electric Ship Technologies Symposium (ESTS)","volume":"137 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":"132276226","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.2013.6523768
R. Amgai, Jian Shi, R. Santos, S. Abdelwahed
In this paper, a machine learning based decision support system for a naval shipboard power management system is proposed considering contingencies and load priority. A probabilistic model based Bayes' classifier is implemented to classify the current operation state of the ShipBoard Power System (SPS), depending upon the power system readiness for critical contingencies. Real power, reactive power, and generator status are taken as input features for the algorithm. Loss of vital/non-vital load is calculated by solving optimal power flow (OPF) to help build the knowledge base. Training data are updated online to increase the accuracy of the proposed approach. The characterization of the operation states helps the shipboard power management system to take the appropriate control action. Initial results from tests are presented and the outcomes from the particular techniques are discussed. Moreover, we also present RTDS based experimental framework towards the ongoing research on overall management system including the diagnosis support. Naïve Bayes' approach has classified the system states with 97.67% accuracy to new instances. Preliminary results show the computation time of this approach is in the order of 25 ms.
{"title":"Machine learning based diagnosis support for ShipBoard Power Systems controls","authors":"R. Amgai, Jian Shi, R. Santos, S. Abdelwahed","doi":"10.1109/ESTS.2013.6523768","DOIUrl":"https://doi.org/10.1109/ESTS.2013.6523768","url":null,"abstract":"In this paper, a machine learning based decision support system for a naval shipboard power management system is proposed considering contingencies and load priority. A probabilistic model based Bayes' classifier is implemented to classify the current operation state of the ShipBoard Power System (SPS), depending upon the power system readiness for critical contingencies. Real power, reactive power, and generator status are taken as input features for the algorithm. Loss of vital/non-vital load is calculated by solving optimal power flow (OPF) to help build the knowledge base. Training data are updated online to increase the accuracy of the proposed approach. The characterization of the operation states helps the shipboard power management system to take the appropriate control action. Initial results from tests are presented and the outcomes from the particular techniques are discussed. Moreover, we also present RTDS based experimental framework towards the ongoing research on overall management system including the diagnosis support. Naïve Bayes' approach has classified the system states with 97.67% accuracy to new instances. Preliminary results show the computation time of this approach is in the order of 25 ms.","PeriodicalId":119318,"journal":{"name":"2013 IEEE Electric Ship Technologies Symposium (ESTS)","volume":"31 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":"133097389","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.2013.6523731
M. Farasat, A. Arabali, A. Trzynadlowski
Power system of the all-electric ship (AES) constitutes an autonomous microgrid employing a variety of distributed energy resources, energy storage devices, and power electronic converters. Innovative strategies are required to ensure flexible and reconfigurable power delivery, robust fault management, and improved power quality. In this paper, a novel approach to voltage control in AES power systems is proposed for radical efficiency increase. In contrast to microgrids emulating the land-based electricity grid, maintaining a steady bus voltage is no longer an objective here. On the contrary, the voltage is compelled to fluctuate in order to minimize switching losses in power electronic converters feeding the loads.
{"title":"A novel control principle for all-electric ship power systems","authors":"M. Farasat, A. Arabali, A. Trzynadlowski","doi":"10.1109/ESTS.2013.6523731","DOIUrl":"https://doi.org/10.1109/ESTS.2013.6523731","url":null,"abstract":"Power system of the all-electric ship (AES) constitutes an autonomous microgrid employing a variety of distributed energy resources, energy storage devices, and power electronic converters. Innovative strategies are required to ensure flexible and reconfigurable power delivery, robust fault management, and improved power quality. In this paper, a novel approach to voltage control in AES power systems is proposed for radical efficiency increase. In contrast to microgrids emulating the land-based electricity grid, maintaining a steady bus voltage is no longer an objective here. On the contrary, the voltage is compelled to fluctuate in order to minimize switching losses in power electronic converters feeding the loads.","PeriodicalId":119318,"journal":{"name":"2013 IEEE Electric Ship Technologies Symposium (ESTS)","volume":"140 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":"115529863","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.2013.6523717
M. Debbou, M. Pietrzak-David
This paper deals with the modeling of a Doubly Fed Induction Machine (DFIM) used in Electrical Naval Propulsion. The advantages of the proposed architecture are described and exploited in order to guarantee improved power efficiency of this propulsion system. Two control strategies, the Stator Field Oriented Control (SFOC) and Dual Direct Torque Control are proposed. The load torque propeller model is developed and the Saber simulation results of all systems are presented and discussed. The methodology called “pseudo experimentation” is used to validate the performances of the system.
{"title":"Double Fed Induction Machine for Electrical Naval Propulsion","authors":"M. Debbou, M. Pietrzak-David","doi":"10.1109/ESTS.2013.6523717","DOIUrl":"https://doi.org/10.1109/ESTS.2013.6523717","url":null,"abstract":"This paper deals with the modeling of a Doubly Fed Induction Machine (DFIM) used in Electrical Naval Propulsion. The advantages of the proposed architecture are described and exploited in order to guarantee improved power efficiency of this propulsion system. Two control strategies, the Stator Field Oriented Control (SFOC) and Dual Direct Torque Control are proposed. The load torque propeller model is developed and the Saber simulation results of all systems are presented and discussed. The methodology called “pseudo experimentation” is used to validate the performances of the system.","PeriodicalId":119318,"journal":{"name":"2013 IEEE Electric Ship Technologies Symposium (ESTS)","volume":"26 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":"123427207","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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