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Weak Grid Operation of A Grid-Following Current-Sourced PV Solar System 电网跟随电流型光伏太阳能系统的弱电网运行
2021 North American Power Symposium (NAPS) Pub Date : 2021-11-14 DOI: 10.1109/NAPS52732.2021.9654540
Zhengyu Wang, Zhixin Miao, Lingling Fan, A. Yazdani
{"title":"Weak Grid Operation of A Grid-Following Current-Sourced PV Solar System","authors":"Zhengyu Wang, Zhixin Miao, Lingling Fan, A. Yazdani","doi":"10.1109/NAPS52732.2021.9654540","DOIUrl":"https://doi.org/10.1109/NAPS52732.2021.9654540","url":null,"abstract":"A barrier to achieving high switching frequencies for the popular voltage-sourced inverter (VSI) topology is that the output voltage of a VSI is subject to significant changes instantaneously. The current-soured inverters (CSI) avoid such shortcoming and have been applied in grid-following inverters for photovoltaic (PV) solar. This paper presents the dynamic performance of a CSI grid-following PV solar operating with a weak grid. The simulation is carried out in MATLAB/Simulink with SimPowerSystems toolbox. The case study results illustrate the operation limits of a grid-following CSI and how those limits are associated with voltage stability and CSI's control settings.","PeriodicalId":123077,"journal":{"name":"2021 North American Power Symposium (NAPS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128176160","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}
引用次数: 1
Neural Network-Based Modeling for A Solid-Oxide Fuel Cell Stack 基于神经网络的固体氧化物燃料电池堆建模
2021 North American Power Symposium (NAPS) Pub Date : 2021-11-14 DOI: 10.1109/NAPS52732.2021.9654644
Innocent Enyekwe, Joseph Holden, Kwang Y. Lee
{"title":"Neural Network-Based Modeling for A Solid-Oxide Fuel Cell Stack","authors":"Innocent Enyekwe, Joseph Holden, Kwang Y. Lee","doi":"10.1109/NAPS52732.2021.9654644","DOIUrl":"https://doi.org/10.1109/NAPS52732.2021.9654644","url":null,"abstract":"With the growing concerns about the environment, more effort has been put towards reducing the pollutant gases generated in the electric power sector by integrating distributed energy conversion devices with high efficiency and low emission. However, these devices such as fuel cells come with their shortcomings and challenges of meeting lifetime and availability goals, especially when operated outside their safe operational range. Therefore, the need to develop not just good controls but also intelligent controls arise to help respect these constraints while meeting up with the load demands. In this paper, Neural Networks (NN s) were used as a system identifier to model the dynamics of a solid-oxide fuel cell (SOFC) stack to be used in the controller design. The proposed NN model was validated by comparing its results with that of an already validated mathematical model.","PeriodicalId":123077,"journal":{"name":"2021 North American Power Symposium (NAPS)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128880365","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}
引用次数: 1
Control Design for 3-Phase Bidirectional Battery Chargers with Multiple Battery Charging Capabilities for Electric Vehicle Fleet Applications 电动汽车多电池充电三相双向充电器控制设计
2021 North American Power Symposium (NAPS) Pub Date : 2021-11-14 DOI: 10.1109/NAPS52732.2021.9654564
Queen R. Okon, Javier Urquizo, N. Kondrath, Pritpal Singh
{"title":"Control Design for 3-Phase Bidirectional Battery Chargers with Multiple Battery Charging Capabilities for Electric Vehicle Fleet Applications","authors":"Queen R. Okon, Javier Urquizo, N. Kondrath, Pritpal Singh","doi":"10.1109/NAPS52732.2021.9654564","DOIUrl":"https://doi.org/10.1109/NAPS52732.2021.9654564","url":null,"abstract":"This paper describes a control structure for a bidirectional battery charger model design which consists of three-phase PWM ac/DC converters linked to a DC/DC converter with a CLLC-type resonant tank circuit. It presents a control structure that accommodates: constant current, constant voltage (CCCV) charging algorithm of an Energy Storage System (ESS), a multiple battery charger setup, and the automation of the combined control system based upon certain conditions being satisfied. The proposed control scheme was simulated and validated for a system integrating two battery charger modules using the PLECS software tool while charging a Li-ion battery model. The interactions between the two modules during the charging process were investigated with and without the introduction of a DC bus.","PeriodicalId":123077,"journal":{"name":"2021 North American Power Symposium (NAPS)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132277249","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}
引用次数: 0
Increasing PV Self-Consumption Using Electric Water Heater Thermal Capacity 利用电热水器热容量增加光伏自用电量
2021 North American Power Symposium (NAPS) Pub Date : 2021-11-14 DOI: 10.1109/NAPS52732.2021.9654701
Foad Najafi, Matthias Fripp
{"title":"Increasing PV Self-Consumption Using Electric Water Heater Thermal Capacity","authors":"Foad Najafi, Matthias Fripp","doi":"10.1109/NAPS52732.2021.9654701","DOIUrl":"https://doi.org/10.1109/NAPS52732.2021.9654701","url":null,"abstract":"In recent years, the implementation of household solar systems increased exponentially. It can cause an imbalance between generation and consumption of energy. Increasing PV self-consumption through Demand Response (DR) is one of the methods to reduce this effect. On the other hand, Dynamic day-ahead pricing will be the future of electricity pricing as the electricity market will be more competitive. This paper proposes a novel method to increase solar self-consumption by using the thermal capacity of the Electric Water Heater (EWH) under a dynamic day-ahead pricing. The proposed method can minimize the electric cost of the user by optimally using the cheap hours of the dynamic price while efficiently uses solar energy in the middle of the day. Also, through a novel method for modeling user comfort, user satisfaction is guaranteed.","PeriodicalId":123077,"journal":{"name":"2021 North American Power Symposium (NAPS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123513249","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}
引用次数: 0
Identifying Redundant Constraints for AC OPF: The Challenges of Local Solutions, Relaxation Tightness, and Approximation Inaccuracy 识别AC OPF的冗余约束:局部解、松弛紧性和逼近不准确性的挑战
2021 North American Power Symposium (NAPS) Pub Date : 2021-11-14 DOI: 10.1109/NAPS52732.2021.9654442
A. O. Aquino, Line A. Roald, D. Molzahn
{"title":"Identifying Redundant Constraints for AC OPF: The Challenges of Local Solutions, Relaxation Tightness, and Approximation Inaccuracy","authors":"A. O. Aquino, Line A. Roald, D. Molzahn","doi":"10.1109/NAPS52732.2021.9654442","DOIUrl":"https://doi.org/10.1109/NAPS52732.2021.9654442","url":null,"abstract":"To compute reliable and low-cost operating points, electric power system operators solve optimization problems that enforce inequality constraints such as limits on line flows, voltage magnitudes, and generator outputs. A common empirical observation regarding these constraints is that only a small fraction of them are binding (satisfied with equality) during operation. Furthermore, the same constraints tend to be binding across time periods. Recent research efforts have developed constraint screening algorithms that formalize this observation and allow for screening across operational conditions that are representative of longer time periods. These algorithms identify redundant constraints, i.e., constraints that can never be violated if other constraints are satisfied, by solving optimization problems for each constraint separately. This paper investigates how the choice of power flow formulation, represented either by the non-convex AC power flow, convex relaxations, or a linear DC approximation, impacts the results and the computational time of the screening method. This allows us to characterize the conservativeness of convex relaxations in constraint screening and assess the efficacy of the DC approximation in this context.","PeriodicalId":123077,"journal":{"name":"2021 North American Power Symposium (NAPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125818967","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}
引用次数: 3
Transmission Congestion Management Via Reactive Power Loss Minimization and Node-Breaker Topology Control 基于无功损耗最小化和节点断路器拓扑控制的输电拥塞管理
2021 North American Power Symposium (NAPS) Pub Date : 2021-11-14 DOI: 10.1109/NAPS52732.2021.9654634
S. Babaeinejadsarookolaee, B. Lesieutre, C. DeMarco
{"title":"Transmission Congestion Management Via Reactive Power Loss Minimization and Node-Breaker Topology Control","authors":"S. Babaeinejadsarookolaee, B. Lesieutre, C. DeMarco","doi":"10.1109/NAPS52732.2021.9654634","DOIUrl":"https://doi.org/10.1109/NAPS52732.2021.9654634","url":null,"abstract":"A novel topology control algorithm using a reactive power loss function is proposed in this paper as a means to reduce congestion and improve margins in the network. A broad range of network switching actions, including both line switching and bus-bar switching, are implemented using a detailed node-breaker representation of the network. The algorithm uses a particular form of the AC power flow equations that allow for the sparse calculation of reactive power loss sensitivity. The numerical results obtained from the case studies show that the proposed approach efficiently reduces congestion or overload in pre-contingency or post-contingency situations. Thus, the proposed algorithm can be used in real-time operation or as a pre-screening step in remedial action plans (RAP) to determine the proper switching actions to reduce the congestion or overload in the network.","PeriodicalId":123077,"journal":{"name":"2021 North American Power Symposium (NAPS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114889836","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}
引用次数: 3
Initial Results for Cramér-Rao Lower Bound for Forced Oscillations in Power Systems 电力系统强迫振动的cram<s:1> - rao下界的初步结果
2021 North American Power Symposium (NAPS) Pub Date : 2021-11-14 DOI: 10.1109/NAPS52732.2021.9654610
Zikai Xu, J. Pierre
{"title":"Initial Results for Cramér-Rao Lower Bound for Forced Oscillations in Power Systems","authors":"Zikai Xu, J. Pierre","doi":"10.1109/NAPS52732.2021.9654610","DOIUrl":"https://doi.org/10.1109/NAPS52732.2021.9654610","url":null,"abstract":"Forced oscillations threaten the reliability of wide-area power systems, and different approaches to estimate forced oscillation have been explored over the past several years. Though these efforts provide powerful tools to estimate a forced oscillation's amplitude, frequency, and phase, a benchmark for estimation accuracy has not been available. This paper provides initial results in such a benchmark called the Cramér-Rao Lower Bound which is a lower bound on the variance in those estimates. A direct approach to derive Cramer-Ran Lower Bound of forced oscillation in power systems is given. In the end, the MinniWECC model is applied to assess the impact of different factors on the bound.","PeriodicalId":123077,"journal":{"name":"2021 North American Power Symposium (NAPS)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128436616","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}
引用次数: 6
Bisection Search of Faulted Segment Based on Radially Energized Distribution Feeder 基于径向通电配电给料机的故障分段切分搜索
2021 North American Power Symposium (NAPS) Pub Date : 2021-11-14 DOI: 10.1109/NAPS52732.2021.9654574
Anurag R. Nagpure, A. Dubey, C. Ten
{"title":"Bisection Search of Faulted Segment Based on Radially Energized Distribution Feeder","authors":"Anurag R. Nagpure, A. Dubey, C. Ten","doi":"10.1109/NAPS52732.2021.9654574","DOIUrl":"https://doi.org/10.1109/NAPS52732.2021.9654574","url":null,"abstract":"The advancement of fault indicators in SCADA communication has evolved with sophisticated mechanism and instrumentation inputs from the pole-mounted feeder terminal units (FRTUs). While this binary inputs would be helpful to narrow down the faulted segment of a distribution feeder, the timing of fault indicators could affect the conclusion of centralized distribution management system (DMS). This paper proposes the methodological approach to systematically pinpoint the faulted segment based on the established logics and uncertainty of realtime measurements. First, the short circuit analysis is reviewed and unbalanced fault current may affect the input variables of the fault indicators. Second, a time interval is imposed based on the timing of the incoming expected inputs. Such inputs are crucial and may vary due to the communication bottleneck of the system. Hence, the reclosing features of protective relays within a feeder would confirm the bisection search. Numerous cases are studied to support the effectiveness of the proposed approach in capturing the overall faulted segment.","PeriodicalId":123077,"journal":{"name":"2021 North American Power Symposium (NAPS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125451962","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}
引用次数: 0
Maximum Power Point Tracking and Voltage Control in a Solar-PV based DC Microgrid Using Simulink 基于Simulink的太阳能光伏直流微电网最大功率点跟踪与电压控制
2021 North American Power Symposium (NAPS) Pub Date : 2021-11-14 DOI: 10.1109/NAPS52732.2021.9654783
Frank Miyagishima, Sijo Augustine, O. Lavrova, H. Nademi, S. Ranade, M. Reno
{"title":"Maximum Power Point Tracking and Voltage Control in a Solar-PV based DC Microgrid Using Simulink","authors":"Frank Miyagishima, Sijo Augustine, O. Lavrova, H. Nademi, S. Ranade, M. Reno","doi":"10.1109/NAPS52732.2021.9654783","DOIUrl":"https://doi.org/10.1109/NAPS52732.2021.9654783","url":null,"abstract":"This paper discusses a solar photovoltaic (PV) DC microgrid system consisting of a PV array, a battery, DC-DC converters, and a load, where all these elements are simulated in MATLAB/Simulink environment. The design and testing entail the functions of a boost converter and a bidirectional converter and how they work together to maintain stable control of the DC bus voltage and its energy management. Furthermore, the boost converter operates under Maximum Power Point Tracking (MPPT) settings to maximize the power that the PV array can output. The control algorithm can successfully maintain the output power of the PV array at its maximum point and can respond well to changes in input irradiance. This is shown in detail in the results section.","PeriodicalId":123077,"journal":{"name":"2021 North American Power Symposium (NAPS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117076560","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}
引用次数: 0
Modeling and Control of Wind Energy Conversion System with Battery Energy Storage System 带电池储能的风能转换系统建模与控制
2021 North American Power Symposium (NAPS) Pub Date : 2021-11-14 DOI: 10.1109/NAPS52732.2021.9654498
Mahmoud M. Badreldien, Y. Chakhchoukh, B. Johnson
{"title":"Modeling and Control of Wind Energy Conversion System with Battery Energy Storage System","authors":"Mahmoud M. Badreldien, Y. Chakhchoukh, B. Johnson","doi":"10.1109/NAPS52732.2021.9654498","DOIUrl":"https://doi.org/10.1109/NAPS52732.2021.9654498","url":null,"abstract":"The energy crisis and the greenhouse gas issues caused by the conventional power resources led governments to pay greater attention to renewable energy resources. Wind energy conversion systems can be regarded as important resources that should be under continued research. The purpose of this paper is to provide modeling, design and control for a wind energy conversion system, including the wind turbine, doubly fed induction generator combined with a battery energy storage system to overcome the intermittent nature of the wind speed. The system is investigated under many scenarios such as changing load at constant wind speed and constant load at variable wind speed. A stator-voltage oriented reference frame using a synchronous rotating dq reference frame has been adopted for controllers design. Finally, an electromagnetic transient simulation program has been used to verify the proposed control systems.","PeriodicalId":123077,"journal":{"name":"2021 North American Power Symposium (NAPS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117161292","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}
引用次数: 0
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