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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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TL;DR: In this paper, a probabilistic approach for the energy and operation management (EOM) of renewable microgrids under uncertain environment is proposed, which consists of 2m point estimate method for covering the existing uncertainties in the MGs and a self-adaptive optimization algorithm based on the gravitational search algorithm (GSA) to determine the optimal energy management of MGs.
234 citations
21 Apr 2008
TL;DR: This paper modeled both TOU and EDRP methods, simultaneously, using the single and multi period load models, based on the load elasticity concept, on the peak load of the Iranian power grid.
Abstract: Demand side management (DSM) is one of the most important methods which has been used to maximize the benefits of the electric power market participants. In the deregulated power systems, DSM is called demand response (DR). In this paper, two DR programs have been focused: time-of-use (TOU) and emergency demand response program (EDRP). In this paper DR is modeled considering both TOU and EDRP methods, simultaneously, using the single and multi period load models, based on the load elasticity concept. The proposed model is implemented on the peak load of the Iranian power grid and the optimum prices for TOU program and the optimum incentives for combined TOU and EDRP programs are determined.
233 citations
TL;DR: In this article, the authors investigate how power phenomena and properties of three-phase systems are described and interpreted by the Instantaneous Reactive Power (IRP) p-q Theory.
Abstract: This paper investigates how power phenomena and properties of three-phase systems are described and interpreted by the Instantaneous Reactive Power (IRP) p-q Theory. This paper demonstrates that this theory misinterprets power properties of electrical systems or provides some results that at least defy a common sense or meaning of some notions in electrical engineering. For example, it suggests the presence of an instantaneous reactive current in supply lines of purely resistive loads and the presence of an instantaneous active current in supply lines of purely reactive loads. Moreover, it suggests that line currents of linear loads with sinusoidal supply voltage contain a nonsinusoidal component. This paper shows, moreover, that the IRP p-q Theory is not capable to identify power properties of three-phase loads instantaneously. A pair of instantaneous values of p and q powers does not allow us to conclude whether the load is resistive, reactive, balanced, or unbalanced. It is known that a load imbalance reduces power factor. However, the IRP p-q Theory does not identify the load imbalance as the cause of power factor degradation.
233 citations
TL;DR: In this paper, the theoretical and experimental analysis of a simple mechanical strain energy sensor with wireless communication is presented, and a simple beam bending experiment is given to illustrate some of the characteristics of the self-powered strain energy sensors.
Abstract: With the growing use of sensors in various structural and mechanical systems, the powering and communication of these sensors will become a critical factor. Wireless communication electronics are becoming ubiquitous and with the decreasing electrical power requirements for these circuits it is now feasible to generate power from the conversion of mechanical energy into electrical energy. This paper focuses on the theoretical and experimental analysis of a simple mechanical strain energy sensor with wireless communication. A simple beam bending experiment is given to illustrate some of the characteristics of the self-powered strain energy sensor.
232 citations
Patent•
18 Feb 2004TL;DR: In this article, a system for generating an electrical power output from a subsea installation that includes at least one flowline is described, where the system includes a turbine that is operatively connected to the flowline, the turbine being rotatable by fluid flowing through the flow line, and the turbine generating the electrical power when the turbine is rotated.
Abstract: A system for generating an electrical power output from a subsea installation that includes at least one flowline, wherein the system includes a turbine that is operatively connected to the flowline, the turbine being rotatable by fluid flowing through the flowline, and the turbine generating the electrical power output when the turbine is rotated.
232 citations