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Capacitor Voltage Balancing in Multi-Level Voltage Reinjection (MLVR) Converters
IEEE Transactions on Power Delivery, 2005In common with conventional multi-level conversion configurations, the multi-level voltage reinjection scheme uses multi-level clamping and dc series connected capacitors. The operation conditions that lead to capacitor voltage unbalance are analyzed and the use of adaptive adjustment of the clamping switches conducting periods is investigated.
Y.H. Liu, J. Arrillaga, N.R. Watson
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Reactive Power Balance and Voltage Control
1997Economic considerations have generally resulted in short-term generation unit commitment practices and trading procedures placing considerable emphasis on scheduling active power to meet system demands. Voltage control is usually managed as a second step in the operation of the power system.
E. Mariani, S. S. Murthy
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Determination of the Volt by Means of Voltage Balances
Metrologia, 1988The determination of the value of 2e/h by means of voltage balances in the institutions: LCIE, PTB, CSIRO and ETF in Zagreb, is discussed. The construction of the balances is described. The measurement results achieved, as well as their expected and obtained partial and total measuring uncertainties, are reviewed.
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Scott transformer based voltage balancing in low voltage distribution networks
2013 IEEE Grenoble Conference, 2013This paper will introduce a low voltage (LV) radial feeder balancing method using Scott transformers. The balancing method converts an unbalanced three-phase voltage into a balanced three-phase voltage and is designed to be used at either a downstream LV feeder location or at a three-phase load supply point. Its impact on LV protection relaying is also
Li, Yun, Crossley, Peter A.
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Method of identifying voltage difference of super capacitors and principle of voltage balancing
2007 European Conference on Power Electronics and Applications, 2007In this paper, the method of identifying voltage difference of super capacitors and the principle of voltage balancing are presented. They are evaluated, according to the tolerance of the capacitance difference, the nature of self-discharging feature and the feasibility of the real implementation. The results show, much energy can be available if lower
Cheng, Yonghua +5 more
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Grounding banks for balancing feeder voltages
Electrical Engineering, 1951DISTRIBUTION engineers, seeking means to provide a better balance of neutral voltage on 3-phase feeders, have suggested the use of grounding banks at one or more points along the feeder. The term 'grounding bank' is used here to mean a Y-delta transformer bank, the Y side tapped from the feeder with the Y neutral connected to the system neutral ...
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Voltage Recovery after Unbalanced and Balanced Voltage Dip in Three-Phase Systems
IEEE Power Engineering Review, 2002This paper studies the recovery of the voltage after a voltage dip due to a fault in a three-phase system. The instant of voltage recovery corresponds to the instant of fault clearing. For single-phase and phase-to-phase faults, a single point-on-wave of voltage recovery can be defined. For two-phase-to-ground and three-phase faults, the recovery takes
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A Bias Source for the Voltage Reference of the BIPM Watt Balance
IEEE Transactions on Instrumentation and Measurement, 2013We have developed a programmable current bias source to set the voltage output of a Josephson voltage standard based on a nonhysteretic array of Josephson junctions (JJs). The device will be operated on the International Bureau of Weights and Measures (BIPM) watt balance experiment and has been designed to bias separately each of the 13 independent ...
Stéphane Solve +2 more
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Dynamic Capacity Control and Balancing in the Medium Voltage Grid
International Joint Conference on Autonomous Agents and Multiagent Systems, 2015Renewable power sources such as wind and solar are inflexible in their energy production, which requires demand to rapidly follow supply in order to maintain energy balance. Promising controllable demands are air-conditioners and heat pumps which use electric energy to maintain a temperature at a setpoint.
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