Issue 1 • March-2012
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Hierarchical Fuzzy Logic System for Implementing Maintenance Schedules of Offshore Power Systems
Publication Year: 2012,Page(s):3 - 11
Cited by: Papers (22)
Smart grid provides the technology for modernizing electricity delivery systems by using distributed and computer-based remote sensing, control and automation, and two-way communications. Potential benefits of the technology are that the smart grid's central control will now be able to control and operate many remote power plant, optimize the overall asset utilization and operational efficiently. ...Show More
Investigation of Economic and Environmental-Driven Demand Response Measures Incorporating UC
Amir Abdollahi;Mohsen Parsa Moghaddam;Masoud Rashidinejad;Mohammad Kazem Sheikh-El-Eslami
Publication Year: 2012,Page(s):12 - 25
Cited by: Papers (149)
In recent years, load management (LM) programs are introduced as an impressive option in all energy policy decisions. Under deregulation, the scope of LM programs has considerably been expanded to include demand response programs (DRPs). Basically, DRPs are divided into two main categories namely, incentive-based programs (IBPs) and time-based rate (TBR) programs. In this paper, an economic model ...Show More
Flexible Charging Optimization for Electric Vehicles Considering Distribution Grid Constraints
Publication Year: 2012,Page(s):26 - 37
In this paper, the basic functions of an electric vehicle charging service provider are described with a focus on the associated optimization problems. A novel method of planning the charging of electric drive vehicles including electricity grid constraints, both voltage and power, is shown. The method establishes an individual charging plan for each vehicle and avoids distribution grid congestion...Show More
A Controlled Filtering Method for Estimating Harmonics of Off-Nominal Frequencies
Cristiano A. G. Marques;Moisés V. Ribeiro;Carlos A. Duque;Paulo. F. Ribeiro;Eduardo A. B. da Silva
Publication Year: 2012,Page(s):38 - 49
The increasing use of power electronics in power systems causes a high injection of harmonic components which can in turn interfere with utility equipment and customer loads. Therefore, the correct estimation and measurement of harmonics have become an important issue. If the power frequency of the signal is steady and near the nominal value, the discrete Fourier transform (DFT) can be used and go...Show More
Coordinated Energy Cost Management of Distributed Internet Data Centers in Smart Grid
Publication Year: 2012,Page(s):50 - 58
Cited by: Papers (79)
This paper addresses the problem of electricity cost management for Internet service providers with a collection of spatially distributed data centers. As the demand on Internet services drastically increases in recent years, the electricity consumed by Internet data centers (IDCs) has been skyrocketing. While most existing research focuses on reducing electric energy consumption of IDCs at one sp...Show More
Wide-Area Measurement Based Dynamic Stochastic Optimal Power Flow Control for Smart Grids With High Variability and Uncertainty
Publication Year: 2012,Page(s):59 - 69
To achieve a high penetration level of intermittent renewable energy, the operation and control of power systems need to account for the associated high variability and uncertainty. Power system stability and security need to be ensured dynamically as the system operating condition continuously changes. A wide-area measurement based dynamic stochastic optimal power flow (DSOPF) control algorithm u...Show More
Optimal Combined Bidding of Vehicle-to-Grid Ancillary Services
Publication Year: 2012,Page(s):70 - 79
Vehicle-to-grid (V2G) has the potential of reducing the cost of owning and operating electric vehicles (EVs) while increasing utility system flexibility. Unidirectional V2G is a logical first step because it can be implemented on standard J1772 chargers and it does not degrade EV batteries from cycling. In this work an optimal combined bidding formulation for regulation and spinning reserves is de...Show More
Residential Appliances Identification and Monitoring by a Nonintrusive Method
Publication Year: 2012,Page(s):80 - 92
The method presented in this paper is based on new residential appliances classification and an events detect model. The whole identification and monitoring system is designed in a financially viable and easily applicable method that is ensured by followed two aspects: first, the only senor is one a meter installed to the main electric supply of a residence; second, the model of appliance is absol...Show More
Residential Appliances Identification and Monitoring by a Nonintrusive Method
Year: 2012 | Volume: 3 | Issue: 1
Modes of Operation and System-Level Control of Single-Phase Bidirectional PWM Converter for Microgrid Systems
Dong Dong;Timothy Thacker;Igor Cvetkovic;Rolando Burgos;Dushan Boroyevich;Fred Wang;Glenn Skutt
Publication Year: 2012,Page(s):93 - 104
Cited by: Papers (83)
Robust system control design and seamless transition between various modes of operation are paramount for multifunctional converters in microgrid systems. This paper proposes a control system for single-phase bidirectional PWM converters for residential power level microgrid systems which is robust and can tolerate transitions between the different modes of operation. This is achieved by means of ...Show More
Generation-Load Mismatch Detection and Analysis
Publication Year: 2012,Page(s):105 - 112
Cited by: Papers (20)
Using data from high-resolution wide-area GPS-synchronized measurements to detect and analyze disturbances within a synchronous electrical interconnection is not trivial. Deterministic methods often fall prey to the non-stationary noisy nature of this type of data. This paper dwells on the location of noteworthy events within “blue-sky” ambient data taken from particularly noisy environments. The ...Show More
A Fault Location Technique for Two-Terminal Multisection Compound Transmission Lines Using Synchronized Phasor Measurements
Publication Year: 2012,Page(s):113 - 121
This paper presents a fault location technique for two-terminal multisection compound transmission lines, which combine overhead lines with underground power cables, using synchronized phasor measurements acquired by global positioning system (GPS) based phasor measurement units (PMUs) or digital relays with embedded PMU or by fault-on relay data synchronization algorithms. The technique is extend...Show More
Modeling and Control System Design of a Grid Connected VSC Considering the Effect of the Interface Transformer Type
Publication Year: 2012,Page(s):122 - 134
Cited by: Papers (28)
In this paper, modeling and control system design of a three-phase VSC system are investigated. The linear model and the control design are developed in the stationary-frame. The model shows a highly coupled system along and coordinates when using a -Y transformer vs. two completely decoupled subsystems in the case of Y-Y transformer. This issue was often overlooked in literature. The developed mo...Show More
Profile of Charging Load on the Grid Due to Plug-in Vehicles
Publication Year: 2012,Page(s):135 - 141
Cited by: Papers (146)
The paper presents a study of the profile of the load imposed on a power system by grid-charging of the onboard battery pack of electric and plug-in hybrid vehicles. The study uses a large database of field-recorded driving cycles stamped with parking times and locations to predict realistic driving habits of drivers in an urban setting. A fuzzy-logic inference system is designed to emulate the de...Show More
This paper presents a new method based on the cost-benefit analysis for optimal sizing of an energy storage system in a microgrid (MG). The unit commitment problem with spinning reserve for MG is considered in this method. Time series and feed-forward neural network techniques are used for forecasting the wind speed and solar radiations respectively and the forecasting errors are also considered i...Show More
On the Accuracy Versus Transparency Trade-Off of Data-Mining Models for Fast-Response PMU-Based Catastrophe Predictors
Publication Year: 2012,Page(s):152 - 161
In all areas of engineering, modelers are constantly pushing for more accurate models and their goal is generally achieved with increasingly complex, data-mining-based black-box models. On the other hand, model users which include policy makers and systems operators tend to favor transparent, interpretable models not only for predictive decision-making but also for after-the-fact auditing and fore...Show More
Optimal Power Allocation Under Communication Network Externalities
Michael G. Kallitsis;George Michailidis;Michael Devetsikiotis
Publication Year: 2012,Page(s):162 - 173
Cited by: Papers (21)
Efficient resource allocation is an important problem that aims for a “greener” and more environmentally friendly electric power grid. The smart behavior of the newly emerged grid, combined with two-way communication between users and the operator allows for actions like measurement, monitoring, prediction, and control signaling so as to maximize social welfare. We introduce a framework for optima...Show More
Optimal PMU Placement by an Equivalent Linear Formulation for Exhaustive Search
Sadegh Azizi;Ahmad Salehi Dobakhshari;S. Arash Nezam Sarmadi;Ali Mohammad Ranjbar
Publication Year: 2012,Page(s):174 - 182
Cited by: Papers (138)
Observability of bulk power transmission network by means of minimum number of phasor measurement units (PMUs), with the aid of the network topology, is a great challenge. This paper presents a novel equivalent integer linear programming method (EILPM) for the exhaustive search-based PMU placement. The state estimation implemented based on such a placement is completely linear, thereby eliminating...Show More
Towards Optimal Electric Demand Management for Internet Data Centers
Publication Year: 2012,Page(s):183 - 192
Electricity cost is becoming a major portion of Internet data center (IDC)'s operation cost and large-scale IDCs are becoming important consumers of regional electricity markets. IDC's energy efficiency is gaining more attention by data center operators and electricity market operators. Effective IDC electric demand management solutions are eagerly sought by all stakeholders. In this paper, a mixe...Show More
Towards Optimal Electric Demand Management for Internet Data Centers
Year: 2012 | Volume: 3 | Issue: 1
High Level Event Ontology for Multiarea Power System
Publication Year: 2012,Page(s):193 - 202
Cited by: Papers (31)
Exchange of event information among multiple interconnected power system operators has become imperative for integrated and secure operation of the system. Considerable literature is reported on the standardization of power system data, while limited work has been done on the standardization of events. In this paper, we define a high level event ontology for power systems comprising seven concepts...Show More
Linear Active Stabilization of Converter-Dominated DC Microgrids
Publication Year: 2012,Page(s):203 - 216
DC microgrids are gaining high momentum under the smart grid environment. DC microgrid stability can be an issue under high penetration of tightly regulated power converters used to interface distributed resources and loads. This paper addresses dc microgrid stability under high penetration of tightly regulated power electronic converters; and proposes three simple and computationally efficient ac...Show More
Analysis and Methodology to Segregate Residential Electricity Consumption in Different Taxonomies
Publication Year: 2012,Page(s):217 - 224
Cited by: Papers (31)
This work presents a two-stage model for the data analysis of electricity consumption. The first stage divides the consumption in two parts: weather- and illumination-related, and residual consumption, where weather-related consumption refers to heating, ventilation, and air conditioning (HVAC). Given the hourly total consumption, we obtain the hourly weather-related and illumination-related elect...Show More
Quality of Optical Channels in Wireless SCADA for Offshore Wind Farms
Publication Year: 2012,Page(s):225 - 232
Cited by: Papers (10)
One of the most important features in the smart gird is to integrate the state-of-the-art communication technologies into power systems. In offshore wind farms, data communications would rely on wireless techniques. The wireless optical communication technology has several advantages over the RF counterpart. However, the impact of atmospheric turbulence on optical signals must be well understood f...Show More
Quality of Optical Channels in Wireless SCADA for Offshore Wind Farms
Year: 2012 | Volume: 3 | Issue: 1
Calculating Frequency at Loads in Simulations of Electro-Mechanical Transients
Publication Year: 2012,Page(s):233 - 240
Cited by: Papers (19)
This paper introduces a new method for calculating frequency at an electrical load in simulations of electro-mechanical transients. The method is designed for simulation studies that require accurate models of sensors such as phasor measurement units and F-Net devices, which measure frequency at locations away from generating plants. These sensors are poised to become critical components in the co...Show More
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