Microgrid Energy Management With Flexibility Constraints: A Data-Driven Solution Method,
2017
Louisiana State University and Agricultural and Mechanical College
Microgrid Energy Management With Flexibility Constraints: A Data-Driven Solution Method, Okan Ciftci
LSU Master's Theses
Microgrid energy management is a challenging and important problem in modern power systems. Several deterministic and stochastic models have been proposed in the literature for the microgrid energy management problem. However, more accurate models are required to enhance flexibility of the microgrids when accounting for renewable energy and load uncertainties. This thesis proposes key contributions to solve the energy management problem for smart building (or small-scale microgrid). In Chapter 3, a deterministic energy management model is presented taking into account system flexibility requirements. Energy storage systems are deployed to enhance the grid flexibility and ramping capability. The objective function of …
A Case Study : An Economic Evaluation Of Liqufied Natural Gas (Lng) Fuel For New Ships Of Korean Ship Owners,
2017
World Maritime University
A Case Study : An Economic Evaluation Of Liqufied Natural Gas (Lng) Fuel For New Ships Of Korean Ship Owners, Hyuntae Kim
World Maritime University Dissertations
No abstract provided.
Lng As A Marine Fuel In Malta : Case Study : Regulatory Analysis And Potential Scenarios For Lng Bunkering Infrastructure,
2017
World Maritime University
Lng As A Marine Fuel In Malta : Case Study : Regulatory Analysis And Potential Scenarios For Lng Bunkering Infrastructure, Mark Philip Cassar
World Maritime University Dissertations
No abstract provided.
Investigation Of Auxiliary Power Potentials Of Solar Photovoltaic Applications On Dry Bulk Carrier Ships,
2017
World Maritime University
Investigation Of Auxiliary Power Potentials Of Solar Photovoltaic Applications On Dry Bulk Carrier Ships, Wandifa Saidyleigh
World Maritime University Dissertations
No abstract provided.
Multi-Mw Solar Pv Pumping System With Capacity Modulation And Battery Voltage Support,
2017
University of Kentucky
Multi-Mw Solar Pv Pumping System With Capacity Modulation And Battery Voltage Support, Oluwaseun M. Akeyo, Vandana Rallabandi, Dan M. Ionel
Power and Energy Institute of Kentucky Faculty Publications
Solar photovoltaic (PV) renewable energy systems are undergoing major technological developments and large-scale field deployment and electric grid integration. This paper proposes a method of expanding the capacity of an existing irrigation farm with additional pumps powered by solar PV. The system includes PV arrays and battery energy storage connected to a common dc bus, which energizes an array of variable speed inverter driven pumps. Capacity modulation is achieved by energizing an optimal number of pumps required in order to meet a particular load demand with minimum supply energy. A grid connection to the dc bus of the power electronic …
Hardware Based Testing Of Communication Based Control For Dc Microgrid,
2017
CUNY City College
Hardware Based Testing Of Communication Based Control For Dc Microgrid, Mahmoud Saleh, Yusef Esa, Ahmed Mohamed
Publications and Research
This paper further describes our work presented in Industry Application Society 2016 Conference, with more details related to the control and operation of the microgrid. The DC microgrid facility was custom designed and implemented at CCNY with minimal off-the-shelf components to enable flexibility and reconfiguration capability. The design steps, requirements, and experimental results of the developed testbed were discussed. As a case study, a central controller for energy management algorithm was developed and tested under several operational scenarios. The experimental results verify the applicability of the developed testbed for validating DC microgrid controllers.
Special Issue On Supercapacitors,
2017
College of Materials Science & Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China;
Strategies To Enhance Energy Density For Supercapacitors,
2017
Laboratory of Clean Energy Chemistry and Materials, State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Lanzhou 730000, P. R. China;
Strategies To Enhance Energy Density For Supercapacitors, Jun-Wei Lang, Xu Zhang, Ru-Tao Wang, Xing-Bin Yan
Journal of Electrochemistry
The biggest advantage of supercapacitor lies in not only the excellent pulse and fast charging-discharging performance, but also the characteristics of long cycle life and wide operating temperature window with no pollution. However, the energy density of supercapacitor is low. In this paper, the working principle, the development status, defects and improvement method of supercapacitors are introduced. Based on the research workes of the supercapacitors with high energy density in our group, combined with the literature reports in recent years, the strategies to promote the energy density of supercarpacitors will be focused. The strategies for the enhancement of energy density …
Porous Carbon Materials Produced By Koh Activation For Supercapacitor Electrodes,
2017
CAS Key Laboratory of Materials for Energy Conversion & Department of Materials Science and Engineering, & iChEM, University of Science and Technology of China, Hefei 230026, P. R. China;
Porous Carbon Materials Produced By Koh Activation For Supercapacitor Electrodes, Jiang-Lin Ye, Yan-Wu Zhu
Journal of Electrochemistry
Porous carbon materials with high specific surface area and excellent conductivity have wide applications in supercapacitor electrodes. Much effort has been made to synthesize and tailor the microstructures of porous carbon materials via various activation procedures (physical and chemical activations). In particular, the chemical activation using potassium hydroxide (KOH) as an activating reagent is promising because of the well-defined micropore size distribution and ultrahigh specific surface area up to 3000 m2·g-1 of the resulting porous carbons. Based mainly on the previous works taken by the authors and collaborators in the field, we have summarized the activation mechanism …
Recent Advances On Carbon And Transition Metallic Compound Electrodes For High-Performance Supercapacitors,
2017
MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, People’s Republic of China;
Recent Advances On Carbon And Transition Metallic Compound Electrodes For High-Performance Supercapacitors, Dun Lin, Xi-Yue Zhang, Yin-Xiang Zeng, Ming-Hao Yu, Xi-Hong Lu, Ye-Xiang Tong
Journal of Electrochemistry
Supercapacitors (SCs) have stimulated intensive interests for their promising applications in electric vehicles and portable electronics, etc. Electrode material is the most important key component of SCs, which vastly determines the performance of SCs. Carbon and transition metallic compound materials have attracted considerable attention and been widely explored as electrode materials. However, the insufficient capacitance of carbon materials and unsatisfactory conductivity and cyclic stability of transition metallic compounds severely limit their implementation as robust SC electrodes. Herein, we highlight our recent efforts to boost the capacitive performance of carbon and metal oxide/nitride electrodes by rationally structural and componential design. The …
Lithium Ion Hybrid Capacitor With High Energy Density,
2017
Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, PR China;University of Chinese Academy of Sciences, Beijing 100049, PR China;
Lithium Ion Hybrid Capacitor With High Energy Density, Xian-Zhong Sun, Xiong Zhang, Kai Wang, Yan-Wei Ma
Journal of Electrochemistry
Lithium ion hybrid capacitors are electrochemical energy storage devices combining the advantages of both Li-ion battery and electrochemical capacitor. They can be extensively used in many fields. However, the commercialization of lithium ion hybrid capacitor has been encountered several problems, e.g., the device structure design, the screening of materials, the pre-lithiation process, and the interface between electrolyte and electrode, etc. This review summarizes the recent research advances in lithium ion hybrid capacitor with high energy density, including the selection of the active materials in cathode/anode and the separator, the pre-lithiation method using the three-electrode structure, the high- and low-temperature performances, …
Template Induced Fabrication Of Nitrogen Doped Carbon Sheets As Electrode Materials In Supercapacitors,
2017
School of Chemistry and chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
Template Induced Fabrication Of Nitrogen Doped Carbon Sheets As Electrode Materials In Supercapacitors, Tao Huang, Guang-Zhi Tao, Chong-Qing Yang, Deng Lu, Lie Ma, Dong-Qing Wu
Journal of Electrochemistry
Due to the good electrical conductivity, high specific surface area, and excellent chemical/mechanical stability, carbon nanomaterials with two-dimensional morphology have gradually become the hot topic of the research on supercapacitors. Herein, we report for the first time the fabrication of nitrogen doped carbon sheets (NCSs). In our approach, the sheet-like magnisum aluminum (MgAl) layered double hydroxide was used as the hard template, which was mixed with o-phenylene diamine and iron chloride. The following thermal treatment could render the polymerization and carbonization of o-phenylene diamine. The NCSs with ordered hexagonal architectures were formed by final etching process of the thermally treated …
Preparation And Characterization Of Cellulose Acetate-Based Separator For Lithium-Ion Batteries,
2017
Coal Engineering College, Shanxi Datong University, Datong 037003, Shanxi, China;
Preparation And Characterization Of Cellulose Acetate-Based Separator For Lithium-Ion Batteries, Hua-Feng Luo, Yuan-Dong Qiao
Journal of Electrochemistry
To improve the electrolyte wettability and thermal resistance of separators used for lithium-ion battery, a novel cellulose acetate (CA)-based separator is facilely prepared by non-solvent induced phase separation (NIPS) wet-process and investigated in lithium-ion batteries. Systematical investigations including morphological characterization, electrolyte wettability and thermal resistance testing were carried out. The results demonstrated that the CA-based separator exhibited well developed three-dimensional porous structures with porosity up to 65%, which is 1.5 times higher than that of PE separator. The CA separator also showed excellent electrolyte uptake (285%) and thermal stability at 150 oC for 30 min. Compared with the commercial …
The Interval Grey Numbers Ranking Based On Risk Preferences,
2017
Missouri University of Science and Technology
The Interval Grey Numbers Ranking Based On Risk Preferences, Zhaobin Li, Zhuo Zhang, Jian Liu, Shuai Zhang
Electrical and Computer Engineering Faculty Research & Creative Works
In this paper, a new method for ranking interval grey numbers to address the challenge in multi-criteria decision-making problems with interval grey numbers has been proposed. This new method involves the risk preferences of decision makers. First, we propose a new method to rank the interval grey numbers by comparing the possibility degree or whitened value. Second, we classify the decision makers into three different types according to their risk preferences then we establish the corresponding risk preference assumptions to solve the problem that different interval grey numbers with the same possibility degree or whitened value. Finally, we use a …
Magnus--An Ultra-High Specific Torque Pm Axial Flux Type Motor With Flux Focusing And Modulation,
2017
University of Kentucky
Magnus--An Ultra-High Specific Torque Pm Axial Flux Type Motor With Flux Focusing And Modulation, Vandana Rallabandi, Narges Taran, Dan M. Ionel, Ion G. Boldea
Power and Energy Institute of Kentucky Faculty Publications
Axial flux permanent magnet (AFPM) synchronous motors are attractive for low speed direct drive systems because of their high specific torque. The present paper proposes a novel axial flux machine topology, called MAGNUS, obtained by combining a yokeless central stator type NS arrangement with two external high polarity spoke-rotors, resulting in very high flux concentration. The stator, which includes main and auxiliary teeth for air-gap profiling has a small number of concentrated coils. Two stator configurations are discussed, the first, a yokeless construction with coils wound around the teeth, and the second with coils placed around the stator core in …
Quantitative Analysis Of Regenerative Energy In Electric Rail Traction Systems,
2017
CUNY City College
Quantitative Analysis Of Regenerative Energy In Electric Rail Traction Systems, Mahmoud Saleh, Oindrilla Dutta, Yusef Esa, Ahmed Mohamed
Publications and Research
This paper aims at determining the influential factors affecting regenerative braking energy in DC rail transit systems. This has been achieved by quantitatively evaluating the dependence of regenerative energy on various parameters, such as vehicle dynamics, train scheduling, ground inclination and efficiency of the electrical devices. The recuperated power and energy have been presented by a mathematical model, comprising of a set of empirical forms, which allows for thorough analysis. A detailed simulation model of a typical DC-traction system has been developed to validate the developed empirical forms. The results verified the validity of the proposed mathematical model, and demonstrated …
Inductance Testing According To The New Ieee Std 1812-Application And Possible Extensions For Ipm Machines,
2017
University of Kentucky
Inductance Testing According To The New Ieee Std 1812-Application And Possible Extensions For Ipm Machines, Vandana Rallabandi, Narges Taran, Dan M. Ionel, Ping Zhou
Power and Energy Institute of Kentucky Faculty Publications
Equivalent circuit parameters are very important for permanent magnet synchronous machines since they serve as the basis for performance estimation and implementation of power electronic drives controls. Specified in the newly approved IEEE Std 1812, a short-circuit test can be employed, in combination with an open-circuit measurement, in order to determine the back emf and the synchronous inductance. In this paper, it is shown that for interior permanent magnet (IPM) machines this approach can be used only to determine the d-axis inductance and additional and separate measurements are required for the q-axis inductance. In this respect, one method widely used …
Optimizing Distributed Energy Resources On A Distribution Feeder,
2017
Portland State University
Optimizing Distributed Energy Resources On A Distribution Feeder, Bill Henry, Stephen Macdonald, Nicole Wehner, Gabe Mcbride, Tyler Groth
Engineering and Technology Management Student Projects
The purpose of this study is to optimize a set of distributed energy resources (DERs) on an electric utility distribution level feeder. A DER is a decentralized resource, usually located at end-use electric utility customer sites, that stores or generates electricity – such as batteries and rooftop photovoltaic solar, or in the case of demand response, in which the utility has the ability to manage electricity consumption to the benefit of distribution grid operation. The aggregation and optimization of a set of DERs of disparate operating characteristics, over a period of three years is performed and the methods employed explained. …
Optimal Microgrids Placement In Electric Distribution Systems Using Complex Network Framework,
2017
CUNY City College
Optimal Microgrids Placement In Electric Distribution Systems Using Complex Network Framework, Mahmoud Saleh, Yusef Esa, Nwabueze Onuorah, Ahmed Mohamed
Publications and Research
This paper provides a new approach to find the optimal location for Microgrids (MGs) in electric distribution systems using complex network analysis. An optimal location in this paper refers to a location that would result in increased grid resilience, reduced power losses, less line loading, higher voltage stability and secured supply to critical loads during power outage. The criteria used to find the optimal placement of MGs were based on the centrality analysis adopted from complex network theory, the center of mass concept used in physics, and the controlled delivery grid (CDG) concept. An IEEE 30-bus system was used as …
Energy Management Algorithm For Resilient Controlled Delivery Grids,
2017
CUNY City College
Energy Management Algorithm For Resilient Controlled Delivery Grids, Mahmoud Saleh, Yusef Esa, Ahmed Mohamed, Haim Grebel, Roberto Rojas-Cessa
Publications and Research
Resilience of the power grid is most challenged at power blackouts since the issues that led to it may not be fully resolved by the time the power is back. In this paper, a Real-Time Energy Management Algorithm (RTEMA) has been developed to increase the resilience of power systems based on the controlled delivery grid (CDG) concept. In a CDG, loads communicate with a central controller, periodically sending requests for power. The central controller runs an algorithm, based on which it may decide whether to grant the requested energy fully or partially. Therefore, the CDG limits loads discretionary access to …
