The Experts below are selected from a list of 13089 Experts worldwide ranked by ideXlab platform
A W Kelley - One of the best experts on this subject based on the ideXlab platform.
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a branch current based state estimation method for distribution systems
IEEE Transactions on Power Systems, 1995Co-Authors: M E Baran, A W KelleyAbstract:A branch-current-based three-phase state estimation (SE) method is proposed for distribution systems. The method is tailored for distribution feeders with a few loops. The method is computationally more efficient than the conventional Node Voltage-based SE methods. To further improve the computational efficiency, it is shown that distribution systems can be reduced without much loss of accuracy in SE. >
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state estimation for real time monitoring of distribution systems
IEEE Transactions on Power Systems, 1994Co-Authors: M E Baran, A W KelleyAbstract:Utilities currently use historical customer load data to forecast the loads in their distribution feeders for real-time feeder analysis and control. In this paper a three-phase state estimation method is developed to increase the accuracy of this load data. The method is based on the weighted least square approach and uses a three-phase Node Voltage formulation. The method can handle power, Voltage, and current measurements. Test results indicate that state estimation can improve the forecasted load data by using real-time measurements. The effectiveness of branch current measurements were also tested. >
M E Baran - One of the best experts on this subject based on the ideXlab platform.
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a branch current based state estimation method for distribution systems
IEEE Transactions on Power Systems, 1995Co-Authors: M E Baran, A W KelleyAbstract:A branch-current-based three-phase state estimation (SE) method is proposed for distribution systems. The method is tailored for distribution feeders with a few loops. The method is computationally more efficient than the conventional Node Voltage-based SE methods. To further improve the computational efficiency, it is shown that distribution systems can be reduced without much loss of accuracy in SE. >
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state estimation for real time monitoring of distribution systems
IEEE Transactions on Power Systems, 1994Co-Authors: M E Baran, A W KelleyAbstract:Utilities currently use historical customer load data to forecast the loads in their distribution feeders for real-time feeder analysis and control. In this paper a three-phase state estimation method is developed to increase the accuracy of this load data. The method is based on the weighted least square approach and uses a three-phase Node Voltage formulation. The method can handle power, Voltage, and current measurements. Test results indicate that state estimation can improve the forecasted load data by using real-time measurements. The effectiveness of branch current measurements were also tested. >
M I Elmasry - One of the best experts on this subject based on the ideXlab platform.
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a deep sub v single power supply sram cell with multi v sub t boosted storage Node and dynamic load
Symposium on VLSI Circuits, 1996Co-Authors: Kiyoo Itoh, A R Fridi, A Bellaouar, M I ElmasryAbstract:The key issues in ultralow Voltage SRAM design are a reduction in power supply Voltage to a solar-cell Voltage of 0.5V or less, single supply operation, and an increase in the cell Voltage-margin. However, these problems remain largely unsolved. Even in most advanced cells an unavoidably high FET threshold Voltage (V/sub T/) of the cell compared with the low stored Node-Voltage of supply restricts the supply to around 1V, although 0.5 V operation has been reported with no cell margin. Moreover, the negative pull down of the cell source line prevents single supply operation, since an on-chip negative Voltage generator comprising charge pumping circuits never manages a heavy data-line capacitance. This paper describes an innovative circuit for overcoming these problems, demonstrating the feasibility of a single 0.3 V, 50 MHz, 0.25 /spl mu/m 8Kb SRAM. A multi-V/sub T/ cell, a boosted cell storage-Node and a dynamic cell load contribute to the outstanding performance.
R Iravani - One of the best experts on this subject based on the ideXlab platform.
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feasible range and optimal value of the virtual impedance for droop based control of microgrids
IEEE Transactions on Smart Grid, 2017Co-Authors: Chen Shen, R IravaniAbstract:This paper presents a systematic method to determine the feasible range and optimal value of the virtual impedance of the droop-based control to enhance a microgrid system performance with respect to power decoupling, reactive power sharing, system damping, and Node Voltage profile. A modified power flow analysis and an augmented small-signal dynamic model of the droop-based controlled microgrid, considering the impact of the virtual impedance, are developed. Subsequently, based on the developed methods, the feasible range of the virtual impedance, which can satisfy all the system performances requirements, is determined and presented. Based on a particle swarm optimization technique, an optimization process is introduced to select a virtual impedance value within the feasible range to achieve the overall optimal microgrid performance. Finally, simulation results in the PSCAD/EMTDC platform are provided to validate the feasibility and effectiveness of the proposed methods.
Wenyao Sun - One of the best experts on this subject based on the ideXlab platform.
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Study on influence of inserted photovoltaic power station to Voltage distributing of distribution network
IEEE PES Innovative Smart Grid Technologies, 2012Co-Authors: Tieyan Zhang, Wenyao SunAbstract:Grid-connected photovoltaic power station has changed the distribution of transmission power, thus influences the Voltage distribution of load Node. In accordance with the relevant provisions, grid-connected photovoltaic power stations should not be active participation of Voltage regulation, but it grid-connected will have a supporting role for each Node Voltage. This paper proposes a maximum admission capacity calculation method which could meet Voltage constraint conditions, by simulation example result in the law of influence on Voltage distribution which a single and multiple photovoltaic power station grid-connected locations, grid-connected capacity, and Node type. For distribution network with photovoltaic power plant plan and design to provide a reference.
