Pub Date : 2018-05-07DOI: 10.1109/ICPS.2018.8428528
David F. Celeita, J. D. Perez, G. Ramos
Power system protections are highly sensitive to decaying DC offset that could appear when a fault occurs. The consequences of this effect represent a challenge in the coordination of protection devices which have been widely studied. The elimination of the DC offset component of current transformers measurements is the objective of this work, including a new autonomous detector based on mathematical morphology. The idea enhances the digital signal processing to prepare the information before the protective device takes a decision. The detection and fast elimination of the decaying DC offset on current signals could improve the speed of protection, coordination, and selectivity. The paper presents the proposed algorithm and assesses the solution using ATP. The model of the CT used for this validation is also presented. Results show the potential of mathematical morphology for signal processing to delete the DC offset component.
{"title":"Decaying DC offset detection on CTs measurements applying mathematical morphology","authors":"David F. Celeita, J. D. Perez, G. Ramos","doi":"10.1109/ICPS.2018.8428528","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8428528","url":null,"abstract":"Power system protections are highly sensitive to decaying DC offset that could appear when a fault occurs. The consequences of this effect represent a challenge in the coordination of protection devices which have been widely studied. The elimination of the DC offset component of current transformers measurements is the objective of this work, including a new autonomous detector based on mathematical morphology. The idea enhances the digital signal processing to prepare the information before the protective device takes a decision. The detection and fast elimination of the decaying DC offset on current signals could improve the speed of protection, coordination, and selectivity. The paper presents the proposed algorithm and assesses the solution using ATP. The model of the CT used for this validation is also presented. Results show the potential of mathematical morphology for signal processing to delete the DC offset component.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131956435","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 : 2018-05-07DOI: 10.1109/ICPS.2018.8369974
M. L. Di Silvestre, L. Dusonchet, S. Favuzza, S. Mangione, L. Mineo, Massimo Mitolo, E. R. Sanseverino, G. Zizzo
A Global Grounding System is defined as the combination of local grounding systems, obtained by their interconnection, which ensures, thanks to their proximity, that no dangerous touch voltages can arise. The interconnection of grounding systems via the armors of the MV cables, between secondary substations and HV/MV stations is herein analyzed to verify the effects on touch voltages in ground-fault conditions. In particular, two main issues are discussed: 1) the transfer of dangerous voltages to secondary substations, due to ground-faults occurring at the HV/MV station; 2) the reduction in the magnitude of the ground potential rise due to ground-fault conditions at secondary substations, thanks to the connection of their ground grids to the HV/MV station's grounding system.
{"title":"Interconnections criteria of grounding grids in global grounding systems","authors":"M. L. Di Silvestre, L. Dusonchet, S. Favuzza, S. Mangione, L. Mineo, Massimo Mitolo, E. R. Sanseverino, G. Zizzo","doi":"10.1109/ICPS.2018.8369974","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8369974","url":null,"abstract":"A Global Grounding System is defined as the combination of local grounding systems, obtained by their interconnection, which ensures, thanks to their proximity, that no dangerous touch voltages can arise. The interconnection of grounding systems via the armors of the MV cables, between secondary substations and HV/MV stations is herein analyzed to verify the effects on touch voltages in ground-fault conditions. In particular, two main issues are discussed: 1) the transfer of dangerous voltages to secondary substations, due to ground-faults occurring at the HV/MV station; 2) the reduction in the magnitude of the ground potential rise due to ground-fault conditions at secondary substations, thanks to the connection of their ground grids to the HV/MV station's grounding system.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121376677","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 : 2018-05-07DOI: 10.1109/ICPS.2018.8370006
S. Saleh
This paper presents the development and performance of a controller for photovoltaic (PV) systems that are grid-connected through a 3φ wavelet modulated (WM) dc-ac power electronic converter (PEC). The proposed controller is designed using decoupled current control loops, which have the d — q-axis components of the currents injected to the grid, as their inputs. The outputs of this controller are command values for the d — q-axis components of the voltages produced by a 3φ WM dc-ac PEC (v∗Id and v∗Iq). The values of v∗Id and v∗Iq are used to determine the required angle ê, which aligns the frame spanned by the actual d-q-axis components of the voltages produced by the controlled 3φ WM dc-ac PEC (vId and vIq). The adjustments of ê allow changing the phase angles of the sinusoidal reference signals used to generate the wavelet modulation switching pulses. The proposed controller is implemented for performance testing using a 15 kW ac module PV system that is interconnected through a 3φ, 6-pulse, WM dc-ac PEC. The performance of the frame-angle controller is tested for different changes in the power delivered to the grid and system parameters. Test results demonstrate stable, fast, and accurate control actions that are complimented by negligible sensitivity to levels of power delivery to the grid, as well as variations in system parameters.
{"title":"Frame-angle-based controller for 3φ interconnected PV systems","authors":"S. Saleh","doi":"10.1109/ICPS.2018.8370006","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8370006","url":null,"abstract":"This paper presents the development and performance of a controller for photovoltaic (PV) systems that are grid-connected through a 3φ wavelet modulated (WM) dc-ac power electronic converter (PEC). The proposed controller is designed using decoupled current control loops, which have the d — q-axis components of the currents injected to the grid, as their inputs. The outputs of this controller are command values for the d — q-axis components of the voltages produced by a 3φ WM dc-ac PEC (v∗<inf>Id</inf> and v<sup>∗</sup><inf>Iq</inf>). The values of v∗<inf>Id</inf> and v∗<inf>Iq</inf> are used to determine the required angle ê, which aligns the frame spanned by the actual d-q-axis components of the voltages produced by the controlled 3φ WM dc-ac PEC (v<inf>Id</inf> and v<inf>Iq</inf>). The adjustments of ê allow changing the phase angles of the sinusoidal reference signals used to generate the wavelet modulation switching pulses. The proposed controller is implemented for performance testing using a 15 kW ac module PV system that is interconnected through a 3φ, 6-pulse, WM dc-ac PEC. The performance of the frame-angle controller is tested for different changes in the power delivered to the grid and system parameters. Test results demonstrate stable, fast, and accurate control actions that are complimented by negligible sensitivity to levels of power delivery to the grid, as well as variations in system parameters.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130922724","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}
This research aimed to explore the maximum connection capacity that distribution substations can withstand as well as the distribution status of the system's power flow when offshore wind farms are connected into the power grid in the Changbin area, and then make analyses into the transient stability of the system. It mainly used PSS/E power software to analyze the off-peak system of Taiwan Power Company in 2018, put forward the average and disperse grid connection methods and the grid connection method based on the loading rate of the line, and compared the maximum connection capacity of the area under the circumstance in which the power grid fails to establish (expand) lines, and then adopted the N-1 planning guideline when offshore wind farms are connected to different substations. In addition, this research also analyzed voltage regulation, low voltage right through analysis, and three-phase short circuit current in view of the power grid connected into the maximum capacity of wind farms, conducted fault simulation of different voltage grades and distances in view of the power grid, and observed the ability of the system to reply stably in the face of accidents. It was shown from the research results that offshore wind farms could allow the grid connection capacity of the Changbin area to reach 1.9GW after adopting the proposed grid connection methods. In addition, it was found through the analysis into transient stability, power flow, and other system impacts that the system could restore stable operations after removal of the fault, which complies with the provisions of the Planning Guideline for Power Transmission System and Technical Points for Parallel Connection of Renewable Energy Power Generation System of Taiwan Power Company.
{"title":"Evaluation of the maximum allowable generation capacity after offshore wind farms are integrated into the existing taipower system-A case study in Taiwan","authors":"Shiue‐Der Lu, Ming-Tse Kuo, Chin-Chung Wu, Ming-Chang Tsou, Haodong Zeng","doi":"10.1109/ICPS.2018.8369984","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8369984","url":null,"abstract":"This research aimed to explore the maximum connection capacity that distribution substations can withstand as well as the distribution status of the system's power flow when offshore wind farms are connected into the power grid in the Changbin area, and then make analyses into the transient stability of the system. It mainly used PSS/E power software to analyze the off-peak system of Taiwan Power Company in 2018, put forward the average and disperse grid connection methods and the grid connection method based on the loading rate of the line, and compared the maximum connection capacity of the area under the circumstance in which the power grid fails to establish (expand) lines, and then adopted the N-1 planning guideline when offshore wind farms are connected to different substations. In addition, this research also analyzed voltage regulation, low voltage right through analysis, and three-phase short circuit current in view of the power grid connected into the maximum capacity of wind farms, conducted fault simulation of different voltage grades and distances in view of the power grid, and observed the ability of the system to reply stably in the face of accidents. It was shown from the research results that offshore wind farms could allow the grid connection capacity of the Changbin area to reach 1.9GW after adopting the proposed grid connection methods. In addition, it was found through the analysis into transient stability, power flow, and other system impacts that the system could restore stable operations after removal of the fault, which complies with the provisions of the Planning Guideline for Power Transmission System and Technical Points for Parallel Connection of Renewable Energy Power Generation System of Taiwan Power Company.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125442317","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 : 2018-05-07DOI: 10.1109/ICPS.2018.8369961
Xiaodong Liang, Yi-gang He, Massimo Mitolo, Weixing Li
Load modeling remains a challenging task in planning, operation and control of power grids. In this paper, a support vector machine (SVM) based machine learning method is proposed for dynamic load modeling of large scale power systems using synchrophasor data recorded by Phasor Measurement Units (PMUs). The difference equation based dynamic load model structure is recommended, however, if a traditional transfer function based model format is preferred, it can be directly obtained from difference equation based model. Case studies are conducted using PMU data recorded in a large power grid in North America. The accuracy of the developed load models is verified by comparing the simulated load model dynamic response with real PMU data. The proposed method not only provides an accurate dynamic load model, parameters of the load model can also be easily updated using new synchrophasor data for either on-line or off-line applications.
{"title":"Support vector machine based dynamic load model using synchrophasor data","authors":"Xiaodong Liang, Yi-gang He, Massimo Mitolo, Weixing Li","doi":"10.1109/ICPS.2018.8369961","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8369961","url":null,"abstract":"Load modeling remains a challenging task in planning, operation and control of power grids. In this paper, a support vector machine (SVM) based machine learning method is proposed for dynamic load modeling of large scale power systems using synchrophasor data recorded by Phasor Measurement Units (PMUs). The difference equation based dynamic load model structure is recommended, however, if a traditional transfer function based model format is preferred, it can be directly obtained from difference equation based model. Case studies are conducted using PMU data recorded in a large power grid in North America. The accuracy of the developed load models is verified by comparing the simulated load model dynamic response with real PMU data. The proposed method not only provides an accurate dynamic load model, parameters of the load model can also be easily updated using new synchrophasor data for either on-line or off-line applications.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133744202","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 : 2018-05-07DOI: 10.1109/ICPS.2018.8369976
S. Saleh, X. F. S. Onge, C. Richard, E. Ozkop, K. McDonald, S. Panetta
Three phase (3φ) power transformers are available in various configurations, which offer the advantage of creating local neutral and grounding points. The different configurations of the primary and secondary sides of 3φ transformers can alter the paths, through which harmonic components of exciting currents flow. Such an alteration can cause the induction of undesired harmonic components in the voltages on both sides of a 3φ power transformer. Among these undesired harmonic components is the third harmonic, which can exceed the standardized limits, and can adversely impact the transformer, transmission system, grounding system, protective devices, and/or fed loads. The magnitude of the voltage third harmonic component is highly dependent on the core type, configuration of primary and secondary windings, and ground return paths. This paper experimentally examines the presence of the third harmonic component in primary and secondary side voltages for a 3φ transformer for different primary and secondary winding configurations, separately derived point-of-supply, and isolated and directly connected grounding. The different configurations will be examined to determine what may or may not be considered a separately derived source.
{"title":"Impacts of grounding and winding configurations on voltage harmonics in 3φ power transformers","authors":"S. Saleh, X. F. S. Onge, C. Richard, E. Ozkop, K. McDonald, S. Panetta","doi":"10.1109/ICPS.2018.8369976","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8369976","url":null,"abstract":"Three phase (3φ) power transformers are available in various configurations, which offer the advantage of creating local neutral and grounding points. The different configurations of the primary and secondary sides of 3φ transformers can alter the paths, through which harmonic components of exciting currents flow. Such an alteration can cause the induction of undesired harmonic components in the voltages on both sides of a 3φ power transformer. Among these undesired harmonic components is the third harmonic, which can exceed the standardized limits, and can adversely impact the transformer, transmission system, grounding system, protective devices, and/or fed loads. The magnitude of the voltage third harmonic component is highly dependent on the core type, configuration of primary and secondary windings, and ground return paths. This paper experimentally examines the presence of the third harmonic component in primary and secondary side voltages for a 3φ transformer for different primary and secondary winding configurations, separately derived point-of-supply, and isolated and directly connected grounding. The different configurations will be examined to determine what may or may not be considered a separately derived source.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131455763","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 : 2018-05-07DOI: 10.1109/ICPS.2018.8369975
Massimo Mitolo, T. Bajzek
The determination of both magnitude and duration of touch voltages is of paramount importance to protect persons against electric shock hazards, such as those caused by basic insulation failure in equipment/appliances, or direct contact with live parts. The magnitude of touch voltages depends on the impedance of the equipment grounding conductor (also referred to as Protective Conductor), which should be therefore properly sized. In the U.S., the National Electric Code (NEC) provides minimum sizes for the equipment grounding conductor; however, the NEC further clarifies that the equipment grounding conductor selected in the specific NEC table might need be sized larger to provide adequate electrical safety. In this paper, the authors discuss the major specifications that a “new generation” tester applied to NEC based low-voltage receptacles, or live terminals of feeder/branch circuits, should possess to indicate to users if a ground-fault would cause unsafe touch potentials. Such tester should also unequivocally identify improper wiring of the outlet (e.g. phase-neutral swap, equipment grounding conductor-to-neutral bond).
{"title":"Measuring the electrical safety in low-voltage distribution systems","authors":"Massimo Mitolo, T. Bajzek","doi":"10.1109/ICPS.2018.8369975","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8369975","url":null,"abstract":"The determination of both magnitude and duration of touch voltages is of paramount importance to protect persons against electric shock hazards, such as those caused by basic insulation failure in equipment/appliances, or direct contact with live parts. The magnitude of touch voltages depends on the impedance of the equipment grounding conductor (also referred to as Protective Conductor), which should be therefore properly sized. In the U.S., the National Electric Code (NEC) provides minimum sizes for the equipment grounding conductor; however, the NEC further clarifies that the equipment grounding conductor selected in the specific NEC table might need be sized larger to provide adequate electrical safety. In this paper, the authors discuss the major specifications that a “new generation” tester applied to NEC based low-voltage receptacles, or live terminals of feeder/branch circuits, should possess to indicate to users if a ground-fault would cause unsafe touch potentials. Such tester should also unequivocally identify improper wiring of the outlet (e.g. phase-neutral swap, equipment grounding conductor-to-neutral bond).","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"446 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123627671","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 : 2018-05-07DOI: 10.1109/ICPS.2018.8467714
S. A. Salamati, S. M. Salamati, F. R. Salmasi
This paper investigates overall modeling and experimental identification and verification of a multi-shaft combined cycle power plant (CCPP). Models for subsystems of CCPP are given which can simulate each unit’s behavior during steady state, as well as transient conditions. Some standard models such as GGOV1, CIGRE model for HRSGs, and AC7 are described and their pros and cons are mentioned. A comprehensive test procedure with practical considerations is introduced and important issues regarding the test procedure and modeling in such a power plant are described in this paper. The paper discussed endeavors to cover most of the practical challenges during real-time parameter's identification process in such a power plant. In order to test the models’ efficacy and accuracy, a 345 MW multi-shaft CCPP has been selected as the case study. Developed models for each component such as gas turbine (GT), heat recovery system generator (HRSG), steam turbine (ST), etc. are studied. A comparative evaluation of field test results extracted from the monitoring system of the plant and simulation results by the proposed model are carried out for different nominal conditions in order to verify the authenticity of the identified models. Finally, a comprehensive model of multishaft CCPP is introduced and its precise validity conditions are described in details. This proposed model can be used in dynamic and stability studies of the power grid.
{"title":"Experimental identification and verification for a comprehensive model of multi-shaft combined cycle power plant","authors":"S. A. Salamati, S. M. Salamati, F. R. Salmasi","doi":"10.1109/ICPS.2018.8467714","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8467714","url":null,"abstract":"This paper investigates overall modeling and experimental identification and verification of a multi-shaft combined cycle power plant (CCPP). Models for subsystems of CCPP are given which can simulate each unit’s behavior during steady state, as well as transient conditions. Some standard models such as GGOV1, CIGRE model for HRSGs, and AC7 are described and their pros and cons are mentioned. A comprehensive test procedure with practical considerations is introduced and important issues regarding the test procedure and modeling in such a power plant are described in this paper. The paper discussed endeavors to cover most of the practical challenges during real-time parameter's identification process in such a power plant. In order to test the models’ efficacy and accuracy, a 345 MW multi-shaft CCPP has been selected as the case study. Developed models for each component such as gas turbine (GT), heat recovery system generator (HRSG), steam turbine (ST), etc. are studied. A comparative evaluation of field test results extracted from the monitoring system of the plant and simulation results by the proposed model are carried out for different nominal conditions in order to verify the authenticity of the identified models. Finally, a comprehensive model of multishaft CCPP is introduced and its precise validity conditions are described in details. This proposed model can be used in dynamic and stability studies of the power grid.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131039574","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 : 2018-05-07DOI: 10.1109/ICPS.2018.8369969
Zhaohao Ding, Liye Xie, Ying Lu, Peng Wang, S. Xia
Internet data centers are booming in the last few years, leading to gigantic amount of energy consumption and greenhouse gas emission. In this paper, a data center microgrid including conventional units, energy storage, and renewable generation is modeled to optimize its electricity bill and carbon footprint. Considering the randomness of electricity price, renewable output and workload distribution, the volatility risk is incorporated to measure the associated operation risk. Then a day-ahead emission-aware stochastic resource planning scheme is formulated to decide the strategy on power procurement, energy storage operation, batch workload allocation and unit commitment of conventional units. Simulation results show the effectiveness of the proposed approach.
{"title":"Emission-aware stochastic resource planning scheme for data center microgrid considering batch workload scheduling and risk management","authors":"Zhaohao Ding, Liye Xie, Ying Lu, Peng Wang, S. Xia","doi":"10.1109/ICPS.2018.8369969","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8369969","url":null,"abstract":"Internet data centers are booming in the last few years, leading to gigantic amount of energy consumption and greenhouse gas emission. In this paper, a data center microgrid including conventional units, energy storage, and renewable generation is modeled to optimize its electricity bill and carbon footprint. Considering the randomness of electricity price, renewable output and workload distribution, the volatility risk is incorporated to measure the associated operation risk. Then a day-ahead emission-aware stochastic resource planning scheme is formulated to decide the strategy on power procurement, energy storage operation, batch workload allocation and unit commitment of conventional units. Simulation results show the effectiveness of the proposed approach.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115182809","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 : 2018-05-01DOI: 10.1109/ICPS.2018.8369988
G. Parise, L. Parise, Giuseppe Mazzau
Fire destroys all things, so it is not easy to identify its cause. The paper suggests a deductive approach in matching possible hypotheses on electrical ignitions. It analyzes the different evolutions that characterize the ignition in a primary electrical distribution versus to the ignition in a branch distribution. At this aim, the paper illustrates a case study of the ignition of a fire that affected two fabrics storage rooms and a transformers substation that was adjacent.
{"title":"Electrical fire ignitions: The evolution assists identifying the origin in the distribution level","authors":"G. Parise, L. Parise, Giuseppe Mazzau","doi":"10.1109/ICPS.2018.8369988","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8369988","url":null,"abstract":"Fire destroys all things, so it is not easy to identify its cause. The paper suggests a deductive approach in matching possible hypotheses on electrical ignitions. It analyzes the different evolutions that characterize the ignition in a primary electrical distribution versus to the ignition in a branch distribution. At this aim, the paper illustrates a case study of the ignition of a fire that affected two fabrics storage rooms and a transformers substation that was adjacent.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134162450","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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