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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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Patent•
24 Nov 1978
TL;DR: In this paper, a closed system with a gaseous fluid as the energy storage medium and turbine working fluid was proposed for storing excess energy produced by an electric utility during low energy demand periods.
Abstract: A method for storing excess energy produced by an electric utility during low energy demand periods, utilizing a closed system with a gaseous fluid as the energy storage medium and turbine working fluid. The fluid medium is stored at low pressure in an underground cavern which is located near a commercial electric utility system. During low energy demand periods, electrical output from the utility is channeled to the subject invention for conversion to potential energy, stored in the form of pressurized fluid in a second, high pressure cavern. This fluid transfer is accomplished by a compressor powered by excess electric output of the utility. During peak periods of power demand, a stream of the pressurized fluid is heated and expanded through a turbine/generator combination to generate electrical output. This electrical power is then used to supplement the utility output to meet the higher level of energy requirement arising during peak demand periods. The expanded fluid medium is subsequently returned to the low pressure storage cavern, pending recycle through the closed system. Various embodiments are disclosed illustrating use of excess electric utility output to accomplish the heating and to supply the compression energy to operate the system.
98 citations
Patent•
15 Aug 2001
TL;DR: In this article, a vertical-mount electrical power distribution plugstrip comprises a long, thin plugstrip body with several power outlet plugs distributed along the length of one face, and a power input cord is provided at one end, and this supplies operating power to each of the power outlet plug through individual relay control.
Abstract: A vertical-mount electrical power distribution plugstrip comprises a long, thin plugstrip body with several power outlet plugs distributed along the length of one face. A power input cord is provided at one end, and this supplies operating power to each of the power outlet plugs through individual relay control.
98 citations
TL;DR: In this article, a simulation study was carried out to investigate the performance of the power generating system based on a developed mathematical model, and the simulated power outputs in steady state were obtained for different global solar radiation intensity, collector area and chimney height.
98 citations
TL;DR: In this paper, the authors studied the electrical performances of MFCs under maximum power point (MPP) load conditions and proposed an algorithm that regulates MFC voltage to one-third of its open-circuit voltage.
98 citations
28 May 2008
TL;DR: In this article, the authors evaluate several utility-scale energy storage technology options for their usage as regulation resources and select flywheels, pumped hydro electric power (or conventional hydroelectric power) plant and sodium sulfur or nickel cadmium batteries as candidate technologies for the Wide Area Energy Management System (WAEMS) project.
Abstract: Energy produced by intermittent renewable resources is sharply increasing in the United States. At high penetration levels, volatility of wind power production could cause additional problems for the power system balancing functions such as regulation. This paper reports some partial results of a project work, recently conducted by the Pacific Northwest National Laboratory (PNNL) for Bonneville Power Administration (BPA). The project proposes to mitigate additional intermittency with the help of Wide Area Energy Management System (WAEMS) that would provide a two-way simultaneous regulation service for the BPA and California ISO systems by using a large energy storage facility. The paper evaluates several utility-scale energy storage technology options for their usage as regulation resources. The regulation service requires a participating resource to quickly vary its power output following the rapidly and frequently changing regulation signal. Several energy storage options have been analyzed based on thirteen selection criteria. The evaluation process resulted in the selection of flywheels, pumped hydro electric power (or conventional hydro electric power) plant and sodium sulfur or nickel cadmium batteries as candidate technologies for the WAEMS project. A cost benefit analysis should be conducted to narrow the choice to one technology.
98 citations