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2017 North American Power Symposium (NAPS)最新文献

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Distributed model predictive control of synchronous machines for stabilizing microgrids 微电网稳定同步电机分布式模型预测控制
2017 North American Power Symposium (NAPS) Pub Date : 2017-09-01 DOI: 10.1109/NAPS.2017.8107347
Xia Miao, M. Ilić
{"title":"Distributed model predictive control of synchronous machines for stabilizing microgrids","authors":"Xia Miao, M. Ilić","doi":"10.1109/NAPS.2017.8107347","DOIUrl":"https://doi.org/10.1109/NAPS.2017.8107347","url":null,"abstract":"In this paper, we revisit the role of excitation control in small microgrids. In normal operation, excitation control is designed to stabilize and regulate voltage and frequency in response to intermittent renewable resources (PVs and loads). Its role remains the same when microgrid gets disconnected and is in islanded/abnormal condition. Today's constant gain exciters need new control logic in order to operate in both normal/abnormal conditions. In this paper, we propose a new model predictive approach to nonlinear excitation control. Provable stabilization and enhanced performance with given operational and physical limits are illustrated on a small microgrid.","PeriodicalId":296428,"journal":{"name":"2017 North American Power Symposium (NAPS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128532868","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: 8
Distributed frequency regulation in smart grids 智能电网中的分布式频率调节
2017 North American Power Symposium (NAPS) Pub Date : 2017-09-01 DOI: 10.1109/NAPS.2017.8107374
Zamiyad Dar, K. Kar, J. Chow
{"title":"Distributed frequency regulation in smart grids","authors":"Zamiyad Dar, K. Kar, J. Chow","doi":"10.1109/NAPS.2017.8107374","DOIUrl":"https://doi.org/10.1109/NAPS.2017.8107374","url":null,"abstract":"We present and analyze distributed control schemes for frequency regulation in a smart grid. We use energy storage, conventional generators, wind generators and demand response to provide frequency support while having no communication or data sharing between them. All participants observe the system frequency and act independently in a decentralized manner to provide frequency regulation. We also propose a novel control scheme for frequency support by energy storage in which the power output of energy storage changes proportionally with the reduction in available energy in energy storage. This prevents any sudden drop in system frequency and provides other participants an opportunity to compensate for the reduced power due to discharge of energy storage. We use our methods to observe the frequency regulation in a three area power system having conventional generators, wind generators energy storage and demand response. Our results show that the addition of demand response improves the value of initial frequency drop, settling frequency and settling time. Use of energy storage further improves these characteristics.","PeriodicalId":296428,"journal":{"name":"2017 North American Power Symposium (NAPS)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128654934","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
Importance of detailed modeling of loads/PV systems connected to secondary of distribution transformers 二次配电变压器负载/光伏系统详细建模的重要性
2017 North American Power Symposium (NAPS) Pub Date : 2017-09-01 DOI: 10.1109/NAPS.2017.8107210
Piyush Gupta, K. Rahimi, R. Broadwater, M. Dilek
{"title":"Importance of detailed modeling of loads/PV systems connected to secondary of distribution transformers","authors":"Piyush Gupta, K. Rahimi, R. Broadwater, M. Dilek","doi":"10.1109/NAPS.2017.8107210","DOIUrl":"https://doi.org/10.1109/NAPS.2017.8107210","url":null,"abstract":"Residential solar Photovoltaic (PV) installations are increasing at a very high pace in the United States. In 2017 there are approximately one million residential solar PV installations in the US. A significant share of these installations are downstream of distribution transformers and thus connected to the secondary. To precisely analyze voltage variations induced by PV systems into distribution systems, accurate models of load and PV systems connected to the secondary side of distribution transformers are required. In the work here we consider two secondary circuit modeling approaches, simple secondary and detailed secondary models. In simple secondary models all loads and all PV generators below a distribution transformer are modeled as an aggregate load and an aggregate PV generator. In the detailed secondary models all loads and PV systems below the distribution transformers are modeled individually and secondary conductors and service drops are also modeled. Using a cloud motion simulator it is observed that employing the simple secondary models can lead to inaccurate and conservative results. Moreover, the locations with the greatest voltage changes are different in the two modeling approaches. This paper highlights the importance of utilizing detailed secondary models over simple secondary models in analyzing PV generation.","PeriodicalId":296428,"journal":{"name":"2017 North American Power Symposium (NAPS)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128587439","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
A comparison of implicit and explicit methods for contingency constrained unit commitment 随机约束单元承诺的隐式和显式方法的比较
2017 North American Power Symposium (NAPS) Pub Date : 2017-09-01 DOI: 10.1109/NAPS.2017.8107295
Shengjun Huang, V. Dinavahi
{"title":"A comparison of implicit and explicit methods for contingency constrained unit commitment","authors":"Shengjun Huang, V. Dinavahi","doi":"10.1109/NAPS.2017.8107295","DOIUrl":"https://doi.org/10.1109/NAPS.2017.8107295","url":null,"abstract":"Reliability management is of great importance for the secure and sufficient operation of power systems, thus the n — KG — KL contingency constrained unit commitment (CCUC) problem is determined for investigation in this paper. In order to reveal the capability of different methods on the solution of CCUC, both explicit and implicit decomposition frameworks have been investigated, as well as their inner feedback strategies, such as Benders decomposition and column-and-constraint generation (CCG) algorithm. In addition, sensitivity analysis, multi-cut strategy, and parallel implementation have also been analyzed and discussed. The comparison between nine explicit and implicit methods — all of them are deterministic with different configurations and the global optimal can be guaranteed in a finite number of iterations — is carried out on the IEEE 24-bus system, resulting in several interesting conclusions. Finally, the IEEE 118-bus test system is employed to explore the potential on the large-scale instance.","PeriodicalId":296428,"journal":{"name":"2017 North American Power Symposium (NAPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115540600","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: 4
Modeling and criterion for voltage stability of grid connected droop controlled inverter 并网下垂控制逆变器电压稳定性建模及判据
2017 North American Power Symposium (NAPS) Pub Date : 2017-09-01 DOI: 10.1109/NAPS.2017.8107346
V. Verma, Sarika Khushalani-Solanki, J. Solanki
{"title":"Modeling and criterion for voltage stability of grid connected droop controlled inverter","authors":"V. Verma, Sarika Khushalani-Solanki, J. Solanki","doi":"10.1109/NAPS.2017.8107346","DOIUrl":"https://doi.org/10.1109/NAPS.2017.8107346","url":null,"abstract":"Increased penetration of distributed generators (DGs) in the grid can cause instability in the system. One such problem is voltage rise. In transmission system, where lines are highly inductive real power depends mainly on angle difference between buses and reactive power exchange depends upon voltage magnitude of buses. Such an assumption might not be valid for distribution system or small scale system. Hence it is important to consider R/X ratio of line while modeling a system for stability studies. This paper models a single inverter system connected to stiff grid. Further the factors that may led to voltage instability of a single inverter system were studied and criterion for system's stability was established.","PeriodicalId":296428,"journal":{"name":"2017 North American Power Symposium (NAPS)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114616864","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: 5
Frequency domain transformer model for electromagnetic transient analysis of networks 电网电磁暂态分析的频域变压器模型
2017 North American Power Symposium (NAPS) Pub Date : 2017-09-01 DOI: 10.1109/NAPS.2017.8107183
Ghassan A. Bilal, Juan M. Villanueva-Ramirez, P. Gómez
{"title":"Frequency domain transformer model for electromagnetic transient analysis of networks","authors":"Ghassan A. Bilal, Juan M. Villanueva-Ramirez, P. Gómez","doi":"10.1109/NAPS.2017.8107183","DOIUrl":"https://doi.org/10.1109/NAPS.2017.8107183","url":null,"abstract":"In this paper a frequency domain three-phase transformer model is implemented using a nodal approach. Easiness and effectiveness of the model are demonstrated by its inclusion in a simplified distribution network. Moreover, angular displacement inherent to different connections of windings is taken into account which proves its versatility. Transient overvoltages caused by switching are computed using the model and the time domain response is obtained using the Numerical Laplace Transform (NLT). Results are assessed by comparisons with EMTP-RV.","PeriodicalId":296428,"journal":{"name":"2017 North American Power Symposium (NAPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127167840","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: 5
Adaptive LQR control with Kalman filter for the variable-speed wind turbine in Region II II区变转速风力机的卡尔曼滤波自适应LQR控制
2017 North American Power Symposium (NAPS) Pub Date : 2017-09-01 DOI: 10.1109/NAPS.2017.8107321
Qiao Li, Tianqi Gao, D. Gao, Xiao Wang
{"title":"Adaptive LQR control with Kalman filter for the variable-speed wind turbine in Region II","authors":"Qiao Li, Tianqi Gao, D. Gao, Xiao Wang","doi":"10.1109/NAPS.2017.8107321","DOIUrl":"https://doi.org/10.1109/NAPS.2017.8107321","url":null,"abstract":"An ALQR (Adaptive Linear Quadratic Regulation) method for the variable speed wind turbines system is proposed in this paper. The controller is designed for the wind turbine operating in the low wind speed (Region 2), in which the pitch of the blades is fixed at the optimal angle. Since the wind turbine is a nonlinear system, the Kalman filter and the adaptive method are implemented in the controller to make the LQR compatible with the nonlinear system. The proposed control scheme is compared in the simulation with several commonly used control methods, i.e. look-up table, PID control and gain-scheduling method. The step changed wind speed profile and the turbulent wind speed profile are adopted for the tests. The results of the simulations show that the proposed ALQR method is much better than the conventional methods.","PeriodicalId":296428,"journal":{"name":"2017 North American Power Symposium (NAPS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125313316","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: 4
Coordinated AC/DC microgrid optimal scheduling 交直流微电网协同优化调度
2017 North American Power Symposium (NAPS) Pub Date : 2017-09-01 DOI: 10.1109/NAPS.2017.8107310
Abdulaziz Alanazi, H. Lotfi, A. Khodaei
{"title":"Coordinated AC/DC microgrid optimal scheduling","authors":"Abdulaziz Alanazi, H. Lotfi, A. Khodaei","doi":"10.1109/NAPS.2017.8107310","DOIUrl":"https://doi.org/10.1109/NAPS.2017.8107310","url":null,"abstract":"This paper proposes a coordinated optimal scheduling model for hybrid AC/DC microgrids. The objective of the proposed model is to minimize the total microgrid operation cost when considering interactions between AC and DC subsystems of the microgrid network. Nonlinear power flow equations for AC and DC networks have been linearized through a proposed model to enable formulating the problem by mixed integer linear programming (MILP) which expedites the solution process and ensures better solutions in terms of optimality. The proposed model is tested on the modified IEEE 33-bus test system. Numerical simulations exhibit the merits of the proposed coordinated AC/DC optimal scheduling model and further analyze its sensitivity to various decisive operational parameters.","PeriodicalId":296428,"journal":{"name":"2017 North American Power Symposium (NAPS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126019112","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: 10
Matrix Pencil Method vs Vector Fitting in the analysis of power-system dynamics 矩阵铅笔法与向量拟合在电力系统动力学分析中的比较
2017 North American Power Symposium (NAPS) Pub Date : 2017-09-01 DOI: 10.1109/NAPS.2017.8107220
D. T. Chavarin, J. L. Naredo
{"title":"Matrix Pencil Method vs Vector Fitting in the analysis of power-system dynamics","authors":"D. T. Chavarin, J. L. Naredo","doi":"10.1109/NAPS.2017.8107220","DOIUrl":"https://doi.org/10.1109/NAPS.2017.8107220","url":null,"abstract":"Rational functions play a central role in the analysis of the dynamics of electric power systems. One of the most used methods to synthesize rational functions of power system elements and sub-networks in frequency domain is Vector Fitting (VF). This paper presents the Matrix Pencil Method (MPM) of the time domain as a viable alternative to rational synthesis. A modification of MPM is proposed in this paper. The two methods, VF and MPM, are compared and applied in the rational synthesis of the transfer (propagation) function of a transmission line.","PeriodicalId":296428,"journal":{"name":"2017 North American Power Symposium (NAPS)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127580833","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: 2
Single area load frequency control using fuzzy-tuned PI controller 采用模糊调谐PI控制器进行单区负载频率控制
2017 North American Power Symposium (NAPS) Pub Date : 2017-09-01 DOI: 10.1109/NAPS.2017.8107352
T. Mohammed, J. Momoh, A. Shukla
{"title":"Single area load frequency control using fuzzy-tuned PI controller","authors":"T. Mohammed, J. Momoh, A. Shukla","doi":"10.1109/NAPS.2017.8107352","DOIUrl":"https://doi.org/10.1109/NAPS.2017.8107352","url":null,"abstract":"This study aims to develop a Load Frequency Control (LFC) for a single area power system using a fuzzy logic tuned PI controller. A deviation of frequency value from the standard (±0.5Hz) arises when real power generation fails to supply demand along with network losses. Various LFC studies have been done exploiting control strategies ranging from classical control schemes to soft analysis techniques. In this proposed study system dynamics is modeled in MATLAB Simulink. Conventional PI controller is designed and tuned with two techniques: using Ziegler Nichols (ZN) tuning and PID tuner app from MATLAB control system toolbox. Intelligent analysis tool, fuzzy logic, is used for performance improvement of the developed controller. Incorporation of advanced tools and optimization techniques improves control response time allowing fast recovery of the system during disturbances and reducing system down time. The result of this work improves system performance and it is tested on 14bus system under different condition.","PeriodicalId":296428,"journal":{"name":"2017 North American Power Symposium (NAPS)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121637370","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
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