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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.


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01 Jan 1998
TL;DR: In this article, the authors discuss the organization and institutionalization of innovation, 1900-1940, and the internal combustion engine, 1970s-1990s and the electronics revolution, 1947-1990.
Abstract: 1. Introduction 2. The organization and institutionalization of innovation, 1900-1940 3. The internal combustion engine 4. Chemicals 5. Electric power 6 The electronics revolution, 1947-1990 8. Concluding observations.

261 citations

Journal ArticleDOI
05 Jun 2018-Energies
TL;DR: This paper presents a review on recent developments of control technologies and power management strategies proposed for AC ship microgrids.
Abstract: At sea, the electrical power system of a ship can be considered as an islanded microgrid. When connected to shore power at berth, the same power system acts as a grid connected microgrid or an extension of the grid. Therefore, ship microgrids show some resemblance to terrestrial microgrids. Nevertheless, due to the presence of large dynamic loads, such as electric propulsion loads, keeping the voltage and frequency within a permissible range and ensuring the continuity of supply are more challenging in ship microgrids. Moreover, with the growing demand for emission reductions and fuel efficiency improvements, alternative energy sources and energy storage technologies are becoming popular in ship microgrids. In this context, the integration of multiple energy sources and storage systems in ship microgrids requires an efficient power management system (PMS). These challenging environments and trends demand advanced control and power management solutions that are customized for ship microgrids. This paper presents a review on recent developments of control technologies and power management strategies proposed for AC ship microgrids.

260 citations

ReportDOI
01 Dec 2011
TL;DR: The Regional Energy Deployment System (ReEDS) as discussed by the authors is a deterministic optimization model of the deployment of electric power generation technologies and transmission infrastructure throughout the contiguous United States into the future.
Abstract: The Regional Energy Deployment System (ReEDS) is a deterministic optimization model of the deployment of electric power generation technologies and transmission infrastructure throughout the contiguous United States into the future. The model, developed by the National Renewable Energy Laboratory's Strategic Energy Analysis Center, is designed to analyze the critical energy issues in the electric sector, especially with respect to potential energy policies, such as clean energy and renewable energy standards or carbon restrictions. ReEDS provides a detailed treatment of electricity-generating and electrical storage technologies and specifically addresses a variety of issues related to renewable energy technologies, including accessibility and cost of transmission, regional quality of renewable resources, seasonal and diurnal generation profiles, variability of wind and solar power, and the influence of variability on the reliability of the electrical grid. ReEDS addresses these issues through a highly discretized regional structure, explicit statistical treatment of the variability in wind and solar output over time, and consideration of ancillary services' requirements and costs.

258 citations

Journal ArticleDOI
TL;DR: In this paper, an exact formula is developed that predicts the power conversion efficiency for a device that contains a piezoelectric component, which reveals a trade-off effect on efficiency caused by the quality factor and electromechanical coupling factor of the device.
Abstract: Recent developments in miniaturized sensors, digital processors and wireless communication systems have many desirable applications. The realization of these applications however, is limited by the lack of a similarly sized power source. Micro-scale concepts to generate electrical power include devices which use the stored energy in fuels to those which harvest energy from the environment. Many proposed power generation systems employ a piezoelectric component to convert the mechanical energy to electrical energy. Of primary importance is the efficiency of power conversion. In this paper, an exact formula is developed that predicts the power conversion efficiency for a device that contains a piezoelectric component. This formula transparently and quantitatively reveals a trade-off effect on efficiency caused by the quality factor and electromechanical coupling factor of the device. In particular, decreasing the structural stiffness leads to the largest gains in efficiency, followed by decreasing the mechanical damping and increasing the effective mass.

257 citations

Journal ArticleDOI
TL;DR: In this paper, a gas accumulator is employed as an energy storage device that provides a smoothing effect to the electric power output of a wave energy converter for power take-off.

257 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