# IEEE Transactions on Power Systems

## Filter Results

Displaying Results 1 - 25 of 70

Publication Year: 2012, Page(s):C1 - 2
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• ### IEEE Transactions on Power Systems publication information

Publication Year: 2012, Page(s): C2
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• ### Importance Sampling of Injected Powers for Electric Power System Security Analysis

Publication Year: 2012, Page(s):3 - 11
Cited by:  Papers (11)
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Power system security analysis is often strongly tied with contingency analysis. To improve Monte Carlo simulation, many different contingency selection techniques have been proposed in the literature. However, with the introduction of more variable generation sources such as wind power and due to fast changing loads, power system security analysis will also have to incorporate sudden changes in i... View full abstract»

• ### Individual Branch and Path Necessary Conditions for Saddle-Node Bifurcation Voltage Collapse

Publication Year: 2012, Page(s):12 - 19
Cited by:  Papers (9)
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This paper explores the relation between saddle-node bifurcation voltage collapse and complex flow limits of individual transmission elements. Two necessary conditions for power system voltage collapse are presented. First, when a transfer of power takes place in a power system, at least one line must reach its static transfer stability limit (STSL) at or before the point of voltage collapse. Seco... View full abstract»

• ### Demand Response in an Isolated System With High Wind Integration

Publication Year: 2012, Page(s):20 - 29
Cited by:  Papers (105)
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Growing load factors in winter and summer peaks are a serious problem faced by the Spanish electric energy system. This has led to the extensive use of peak load plants and thus to higher costs for the whole system. Wind energy represents a strongly increasing percentage of overall electricity production, but wind normally does not follow the typical demand profile. As generation flexibility is li... View full abstract»

• ### Planned Scheduling for Economic Power Sharing in a CHP-Based Micro-Grid

Publication Year: 2012, Page(s):30 - 38
Cited by:  Papers (77)
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At the planning of combined heat and power (CHP)-based micro-grid, its distributed energy resources (DER) capacity is to be selected and deployed in such a way that it becomes economically self-sufficient to cater all the loads of the system without utility's participation. Economic deployment of DERs is meant to select optimal locations, optimal sizes, and optimal technologies. Optimal locations ... View full abstract»

• ### Tight Mixed Integer Linear Programming Formulations for the Unit Commitment Problem

Publication Year: 2012, Page(s):39 - 46
Cited by:  Papers (115)
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This paper examines the polytope of feasible power generation schedules in the unit commitment (UC) problem. We provide computational results comparing formulations for the UC problem commonly found in the literature. We introduce a new class of inequalities, giving a tighter description of feasible operating schedules for generators. Computational results show that these inequalities can signific... View full abstract»

• ### Fuzzy Optimal Phase Balancing of Radial and Meshed Distribution Networks Using BF-PSO Algorithm

Publication Year: 2012, Page(s):47 - 57
Cited by:  Papers (21)
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Due to increasing neutral current and power losses resulting from phase unbalancing in distribution networks, the act of phase balancing has been a matter of interest in recent years. In this paper, a new method for phase arrangement of laterals and the distribution transformers is presented based on bacterial foraging (BF) oriented by particle swarm optimization (PSO) algorithm (BF-PSO). The algo... View full abstract»

• ### Stochastic Hydro-Thermal Scheduling Under ${rm CO}_{2}$ Emissions Constraints

Publication Year: 2012, Page(s):58 - 68
Cited by:  Papers (35)
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Despite the uncertainty surrounding the design of a mechanism which is ultimately accepted by nations worldwide, the necessity to implement regulations to curb emissions of greenhouse gases on a global scale is consensual. The electricity sector plays a fundamental role in this puzzle and countries may soon have to revise their operating policy directives in order to make them compatible with addi... View full abstract»

• ### Dynamic Load Models for Industrial Facilities

Publication Year: 2012, Page(s):69 - 80
Cited by:  Papers (15)
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This paper presents a new method to construct dynamic models for large industrial and commercial facilities commonly connected to power transmission systems. These facilities typically draw large amounts of power and have complex dynamic responses to power system disturbances. Traditional load modeling approaches such as those based on load composition or site measurement are not adequate to produ... View full abstract»

• ### Computing All Nash Equilibria of Multiplayer Games in Electricity Markets by Solving Polynomial Equations

Publication Year: 2012, Page(s):81 - 91
Cited by:  Papers (15)
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The analysis of the Nash equilibrium (NE) in electricity markets with imperfect competition is subject to two major challenges: the treatment of multiplayer games and the determination of the existence of multiple market equilibria. To resolve these obstacles, a solution method, based on the payoff matrix approach and polynomial equations, is proposed in this paper to calculate all the Nash equili... View full abstract»

• ### Zero Duality Gap in Optimal Power Flow Problem

Publication Year: 2012, Page(s):92 - 107
Cited by:  Papers (317)  |  Patents (1)
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The optimal power flow (OPF) problem is nonconvex and generally hard to solve. In this paper, we propose a semidefinite programming (SDP) optimization, which is the dual of an equivalent form of the OPF problem. A global optimum solution to the OPF problem can be retrieved from a solution of this convex dual problem whenever the duality gap is zero. A necessary and sufficient condition is provided... View full abstract»

• ### Investment Planning for Electric Power Systems Under Terrorist Threat

Publication Year: 2012, Page(s):108 - 116
Cited by:  Papers (21)
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Access to electric power is critical to societal welfare. In this paper, we analyze the interaction between a defender and a terrorist who threatens the operation of an electric power system. The defender wants to find a strategic defense to minimize the consequences of an attack. Both parties have limited budgets and behave in their own self-interest. The problem is formulated as a multi-level mi... View full abstract»

• ### A Solution to the Unit Commitment Problem Using Imperialistic Competition Algorithm

Publication Year: 2012, Page(s):117 - 124
Cited by:  Papers (52)
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This paper presents a new approach via a new evolutionary algorithm known as imperialistic competition algorithm (ICA) to solve the unit commitment (UC) problem. In ICA the initial population individuals (countries) are in two types: imperialists and colonies that all together form some empires. Imperialistic competitions among these empires converge to a state in which there exists only one empir... View full abstract»

• ### Corrective Line Switching With Security Constraints for the Base and Contingency Cases

Publication Year: 2012, Page(s):125 - 133
Cited by:  Papers (12)
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Following a line outage, the fast corrective operations of transmission line switching might be used to regain N-1 security of the system without generation re-dispatch or load shedding. The problem to find feasible switching operations can be formulated as a constraint satisfaction problem (CSP). Feasibility checking, however, is difficult since changes in load flows caused by line switchi... View full abstract»

Publication Year: 2012, Page(s):134 - 141
Cited by:  Papers (121)
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Short-term load forecasting is an essential instrument in power system planning, operation, and control. Many operating decisions are based on load forecasts, such as dispatch scheduling of generating capacity, reliability analysis, and maintenance planning for the generators. Overestimation of electricity demand will cause a conservative operation, which leads to the start-up of too many units or... View full abstract»

• ### Small Population-Based Particle Swarm Optimization for Short-Term Hydrothermal Scheduling

Publication Year: 2012, Page(s):142 - 152
Cited by:  Papers (46)
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A small population-based particle swarm optimization (SPPSO) approach is presented to solve the problem of short-term hydrothermal scheduling (STHS). In the proposed approach, a novel mutation operation that selects the flying guides for each individual is employed to enhance the diversity of the small population. A DE algorithm is employed as an acceleration operation to accelerate the convergenc... View full abstract»

• ### A New Index and Classification Approach for Load Pattern Analysis of Large Electricity Customers

Publication Year: 2012, Page(s):153 - 160
Cited by:  Papers (33)
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Conducting load pattern analysis is an important task in obtaining typical load profiles (TLPs) of customers and grouping them into classes according to their load characteristics. When using clustering techniques to obtain the load patterns of electricity customers, choosing a suitable clustering algorithm and determining an appropriate cluster number are always important and difficult issues. Th... View full abstract»

• ### Augmenting Wind Power Penetration and Grid Voltage Stability Limits Using ESS: Application Design, Sizing, and a Case Study

Publication Year: 2012, Page(s):161 - 171
Cited by:  Papers (44)
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This paper presents a comprehensive energy storage system (ESS) application design for regulating wind power variation and increasing wind energy integration and grid voltage stability. The design includes a method for calculating a reference output profile, a charge-discharge scheme for directing the ESS operation, and an optimization-based method for determining ESS optimal rating. The efficacy ... View full abstract»

• ### Imposing Radiality Constraints in Distribution System Optimization Problems

Publication Year: 2012, Page(s):172 - 180
Cited by:  Papers (111)
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Distribution systems commonly operate with a radial topology, so all models of optimization problems in these distribution systems should consider radiality in their formulation. This work presents a literature review, a critical analysis, and a proposal for incorporating the radiality constraints in mathematical models of optimization problems for radial distribution systems. The objective is to ... View full abstract»

• ### Optimal Self-Scheduling of Thermal Units During Commissioning

Publication Year: 2012, Page(s):181 - 188
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This paper addresses the problem of the self-scheduling of thermal generating units during commissioning. A 0/1 mixed-integer linear formulation is presented, which allows an accurate and realistic modeling for the scheduling of the commissioning tests that should be performed once the construction of the thermal unit has been completed and prior to entering its commercial operation. A flexible co... View full abstract»

• ### Analysis of Optimal Reconfiguration of Shipboard Power Systems

Publication Year: 2012, Page(s):189 - 197
Cited by:  Papers (9)
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In power system reconfiguration, the status (ON/OFF) of switches are optimized such that maximum power is delivered to loads after the occurrence of a fault. The optimized reconfiguration is achieved by prioritizing power delivered to vital loads over semi-vital and nonvital loads. The formulation presented in this paper considers a new balanced hybrid (AC and DC) shipboard power system (SPS). Ana... View full abstract»

• ### Technique to Develop Auto Load Shedding and Islanding Scheme to Prevent Power System Blackout

Publication Year: 2012, Page(s):198 - 205
Cited by:  Papers (24)
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Abnormal condition in a power system generally leads to a fall in system frequency, and it leads to system blackout in an extreme condition. This paper presents a technique to develop an auto load shedding and islanding scheme for a power system to prevent blackout and to stabilize the system under any abnormal condition. The technique proposes the sequence and conditions of the applications of di... View full abstract»

• ### A Chance-Constrained Two-Stage Stochastic Program for Unit Commitment With Uncertain Wind Power Output

Publication Year: 2012, Page(s):206 - 215
Cited by:  Papers (153)
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In this paper, we present a unit commitment problem with uncertain wind power output. The problem is formulated as a chance-constrained two-stage (CCTS) stochastic program. Our model ensures that, with high probability, a large portion of the wind power output at each operating hour will be utilized. The proposed model includes both the two-stage stochastic program and the chance-constrained stoch... View full abstract»

• ### Online Set Point Adjustment for Trajectory Shaping in Microgrid Applications

Publication Year: 2012, Page(s):216 - 223
Cited by:  Papers (18)
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This paper proposes and evaluates a strategy to mitigate the transients of an apparatus, e.g., an electronically-interfaced distributed energy resource (DER) unit. This strategy is based on response monitoring and can be implemented based on either set point automatic adjustment (SPAA) or set point automatic adjustment with correction-enabled (SPAACE). SPAA takes advantage of an approximate model ... View full abstract»

## Aims & Scope

Covers the requirements, planning, analysis, reliability, operation, and economics of electric generating, transmission, and distribution systems for general industrial, commercial, public, and domestic consumption.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Nikos Hatziargyriou
National Technical University of Athens