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Electric power

About: Electric power is a research topic. Over the lifetime, 73036 publications have been published within this topic receiving 636991 citations.


Papers
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Journal ArticleDOI
TL;DR: In this paper, a sequential sealed-bid and sealed-offer auction is applied to the pricing of electric power by using linear programming, which is a market-based approach for electric power pricing.
Abstract: The expected move to a market-based electric power industry will significantly change electric utility operations. These changes will fundamentally alter the pricing of electric power. How this pricing will be accomplished is a key issue. Traditionally, embedded cost based methods have been used. Spot-pricing has received attention as a possible approach in a market-based electric power environment. Another market-based approach is the use of auctions. This paper presents the application of a sequential sealed-bid and sealed-offer auction to the pricing of electric power by using linear programming. >

165 citations

Journal ArticleDOI
TL;DR: It is hypothesized that wind power output could be stabilized if wind generators were located in a meteorologically designed configuration and electrically connected, and suggested institutions appropriate to create and manage the power system analyzed here are suggested.
Abstract: World wind power resources are abundant, but their utilization could be limited because wind fluctuates rather than providing steady power. We hypothesize that wind power output could be stabilized if wind generators were located in a meteorologically designed configuration and electrically connected. Based on 5 yr of wind data from 11 meteorological stations, distributed over a 2,500 km extent along the U.S. East Coast, power output for each hour at each site is calculated. Each individual wind power generation site exhibits the expected power ups and downs. But when we simulate a power line connecting them, called here the Atlantic Transmission Grid, the output from the entire set of generators rarely reaches either low or full power, and power changes slowly. Notably, during the 5-yr study period, the amount of power shifted up and down but never stopped. This finding is explained by examining in detail the high and low output periods, using reanalysis data to show the weather phenomena responsible for steady production and for the occasional periods of low power. We conclude with suggested institutions appropriate to create and manage the power system analyzed here.

165 citations

Patent
30 May 2007
TL;DR: In this article, a transition from the use of the higher power consuming graphics subsystem to the lower power consuming GPU subsystem, while placing the GPU subsystem in a lower power consumption mode, was proposed to reduce overall power consumption.
Abstract: Many computing device may now include two or more graphics subsystems. The multiple graphics subsystems may have different abilities, and may, for example, consume differing amount of electrical power, with one subsystem consuming more average power than the others. The higher power consuming graphics subsystem may be coupled to the device and used instead of, or in addition to, the lower power consuming graphics subsystem, resulting in higher performance or additional capabilities, but increased overall power consumption. By transitioning from the use of the higher power consuming graphics subsystem to the lower power consuming graphics subsystem, while placing the higher power consuming graphics subsystem in a lower power consumption mode, overall power consumption is reduced.

164 citations

Book
10 Sep 1998
TL;DR: In this article, the authors present a history of the electrical power industry under regulation and de-regulation, and compare the good and bad of utility regulation goals for and effects of de-regulating, comparing four Approaches to Regulation and De-Regulation.
Abstract: THE ELECTRIC INDUSTRY AND ITS TRADITIONAL REGULATED STRUCTURE Introduction Electric Utility Functions and Systems Electric Utility Resources and Organization Vertical Integration and Monopoly Regulation Electric Utility Business Frameworks Government Regulatory Agencies and Commissions Electrical Equipment Suppliers and Developers A Complex Industry Undergoing Major Changes THE ELECTRIC INDUSTRY UNDER DE-REGULATION - AN OVERVIEW Introduction De-Regulation: Concepts and Evolution No Competition at the Retail Level Competition at the Wholesale Generation Level Independently Operated Regional Transmission Grids The Electricity Doesn't Care Although People and Money Do The Electric Utility Industry Under De-Regulation An Industry In Need of Fine Tuning A HISTORY OF THE ELECTRIC POWER INDUSTRY Three Intertwined Aspects Grew Simultaneously Growth of Electrical Usage The Growth of Electrical Systems Technology The Rise of the Electrical Utility Industry Looking to the Future For Further Reading ELECTRIC POWER Introduction Voltage, Current, and Power Characteristics of Electric Power and Systems Key Points For Further Reading USING ELECTRIC ENERGY Introduction A Flexible Form of Energy Four Basic Applications Electricity is Bought for End-Uses The Utility's Perspective on Customer Power Usage Conservation, Energy Efficiency, and Demand-Side Management Summary For Further Reading CREATING ELECTRICITY: POWER GENERATION Generating Electric Power Electric Generating Systems Types of Generating Plants Summary For Further Reading RENEWABLE POWER GENERATION Free Fuel and Low Environmental Impact Hydro Power Wind-Driven Power Generation Solar Power Other Renewable Generation Technologies Are Renewable Resources Practical? For Further Reading DISTRIBUTED GENERATION AND STORAGE Distributed Power Generation Types of Distributed Generators Distributed Power Storage Summary For Further Reading ELECTRIC UTILITY POWER SYSTEMS Introduction T&D System Equipment T&D System Layout Summary For Further Reading REGULATION AND DE-REGULATION Introduction Why Were Electric Utilities Regulated? Why De-Regulate? The Good and Bad of Utility Regulation Goals for and Effects of De-Regulation Comparing Four Approaches to Regulation and De-Regulation Increased Services From and Financial Pressures On LDCs For Further Reading DE-REGULATION AT THE WHOLESALE POWER LEVEL Introduction The Wholesale Power Marketplace Do Buyers Submit Bids? Buying Energy vs. Buying Capacity How is Wholesale Power Priced? Summary THE POWER GRID IN THE DE-REGULATED INDUSTRY Generation and Transmission in a De-Regulated Industry The Wholesale Transmission Level What is Being Sold at the Transmission Level? How Is Transmission Service Priced? The Eventual Winner: Locationally-Based Pricing? Summary of Key Points For Further Reading POWER DISTRIBUTION IN A DE-REGULATED INDUSTRY Introduction Open Access Distribution Changes in Distribution Operations Will Distribution Performance Improve Due to "Competition"? For Further Reading RETAIL SALES IN A FULLY DE-REGULATED INDUSTRY Introduction Load Aggregation and Services RESCO Identities and Industry Position How Does It All Work? For Further Reading SERVICE RELIABILITY AND AGING INFRASTRUCTURES Introduction Aging T&D Infrastructures Sustainable-Point Analysis of Aging Infrastructures Outages and Reliability For Further Reading SYSTEM BLACKOUTS AND OPERATIONAL COMPLEXITY Introduction Blackouts: An Overview Synchronized Operation of Power Systems Why Do Blackouts Occur? Summary and Concluding Comments For Further Reading GLOSSARY INDEX

164 citations

Journal ArticleDOI
TL;DR: In this paper, the authors examined a network of charging stations equipped with an energy storage device and proposed a scheme that allocates power to them from the grid, as well as routes customers.
Abstract: In order to increase the penetration of electric vehicles, a network of fast charging stations that can provide drivers with a certain level of quality of service (QoS) is needed. However, given the strain that such a network can exert on the power grid, and the mobility of loads represented by electric vehicles, operating it efficiently is a challenging and complex problem. In this paper, we examine a network of charging stations equipped with an energy storage device and propose a scheme that allocates power to them from the grid, as well as routes customers. We examine three scenarios, gradually increasing their complexity. In the first one, all stations have identical charging capabilities and energy storage devices, draw constant power from the grid and no routing decisions of customers are considered. It represents the current state of affairs and serves as a baseline for evaluating the performance of the proposed scheme. In the second scenario, power to the stations is allocated in an optimal manner from the grid and in addition a certain percentage of customers can be routed to nearby stations. In the final scenario, optimal allocation of both power from the grid and customers to stations is considered. The three scenarios are evaluated using real traffic traces corresponding to weekday rush hour from a large metropolitan area in the US. The results indicate that the proposed scheme offers substantial improvements of performance compared to the current mode of operation; namely, more customers can be served with the same amount of power, thus enabling the station operators to increase their profitability. Further, the scheme provides guarantees to customers in terms of the probability of being blocked (and hence not served) by the closest charging station to their location. Overall, the paper addresses key issues related to the efficient operation, both from the perspective of the power grid and the drivers satisfaction, of a network of charging stations.

163 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20241
2023267
2022678
20211,512
20202,845
20193,476