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On-Line Voltage Stability Monitoring
2018 IEEE International Symposium on Circuits and Systems (ISCAS), 2018This paper reviews the basic assumptions of real-time voltage instability monitoring, based on impedance matching and compares it with a new method based on either phasor measurement units (PMU), or distance relays. It is shown that the limitations associated with impedance matching assumptions are overcome by the proposed method, which can accurately ...
Costas D. Vournas +1 more
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Stability of Voltage Regulators
Transactions of the American Institute of Electrical Engineers, 1950THE PRESENCE in many voltage regulator circuits of nonlinear control elements has prevented a complete mathematical treatment of the subject. However, Liapounoff's theory1 ofthe stability of dynamic systems affords a solution to the problem of stability of electric circuits subjected to small displacements from equilibrium.
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Study on system voltage oscillation and voltage stability control
2012 10th International Power & Energy Conference (IPEC), 2012This paper analyzes system voltage oscillation and proposes a new systematic method for voltage stability control in the power system. Recently, renewable energy and distributed power generation have been introduced into power systems because of worldwide societal interest in environmental problems.
Yuya Suzuki +2 more
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Angle, Voltage, and Frequency Stability
2008info:eu-repo/semantics ...
Cañizares, Claudio +2 more
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Voltage stability preventive control using a new voltage stability index
2004 International Conference on Power System Technology, 2004. PowerCon 2004., 2005Effective voltage control schemes have been brought to attention in a considerable number of studies, as power system loads are located farther away from power plants and reactive power losses have tended to increase due to the heavier power flow with high load growth and long distance transmission.
T. Esaka +3 more
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A Review of Voltage Stability Assessment Techniques with an Improved Voltage Stability Indicator
International Journal of Emerging Electric Power Systems, 2015Abstract A blackout can take place in entire power system or a part of the system due to extreme voltage instability (voltage collapse) that can appear abruptly. Instability prediction and continuous monitoring of the power system performance is, therefore, known exigent.
Mir Sayed Shah Danish +2 more
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On voltage stability regions and voltage secondary control
PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376), 2003This paper presents some new results on the geometry of the reactive load-flow problem. These results have implications in order to asses the system margin to the voltage collapse and to design a secondary voltage control aimed to avoid the voltage collapse.
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A New Line Voltage Stability Index (NLVSI) For Voltage Stability Assessment
2019Power system is probably one of the most complex dynamical systems. In these systems, active and reactive power demand is increasing day by day, other way it can be said that the stress on these systems is increasing. Under these stressed conditions, they are operating at the stability limits to meet their load demand.
Trinadha Burle +2 more
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Introduction to Voltage Stability
2021Voltage stability is a branch of power system stability that has developed late. In general, the research on voltage stability can be divided into three stages. In Stage I from 1940s when the first voltage stability criterion dQ/dU [1] was put forward by Malkovich, a Russian scholar, to the mid-1970s, insufficient attention was been paid to voltage ...
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Review of Scientific Instruments, 1937
A new voltage stabilizer circuit is described. The circuit is of the bridge type wherein an essentially constant current is maintained in the output resistor. The particular feature of the circuit is the elimination of transients in the output voltage due to changes in emission of the cathode of the type 78 stabilizer tube.
J. A. Ashworth, J. C. Mouzon
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A new voltage stabilizer circuit is described. The circuit is of the bridge type wherein an essentially constant current is maintained in the output resistor. The particular feature of the circuit is the elimination of transients in the output voltage due to changes in emission of the cathode of the type 78 stabilizer tube.
J. A. Ashworth, J. C. Mouzon
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