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Single Event-Induced Instability in Linear Voltage Regulators
IEEE Transactions on Nuclear Science, 2006SET-induced oscillations were measured on a stable linear-regulator that uses the LM124 op-amp in its regulation block. Simulations showed that single events act as stimuli that initiate a large-signal oscillation in the LM124 differential amplifier and compensation capacitor path.
Adell, P.C. +6 more
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On mechanism of voltage instability in power systems
2005 IEEE Russia Power Tech, 2005The phenomenon of voltage instability and collapse is considered as a manifestation of steady state instability. The behaviour of a simple power system at unstable equilibrium point with different portions of induction motor load is analyzed in the torque-slip plane of induction motor with time scale decomposition of the system equations into fast and ...
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MEASURES OF VOLTAGE INSTABILITY AND VOLTAGE COLLAPSE, PART I: THEORETICAL DEVELOPMENT
Electric Machines & Power Systems, 1995The purpose of this paper is to present a theoretical foundation for modeling, analysis, and testing of systems experiencing voltage collapse. The boundary theorem of the load flow feasibility region (FR), the steady-state stability margin and the sensitivity of the stability margin to bus voltages and bus injections are defined.
JIAN H. BIAN, PARVIZ RASTGOUFARD
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MEASURES OF VOLTAGE INSTABILITY AND VOLTAGE COLLAPSE, PART II: COMPUTATIONAL ASPECTS
Electric Machines & Power Systems, 1995Based on the boundary theorems developed in [1], a method of voltage stability analysis referred to as the Eigen-Structure Analysis method, is developed that does not require the complicated nonlinear programming calculations for evaluation of the closest boundary condition corresponding to a given power network operating point with voltage controlled ...
JIAN H. BIAN, PARVIZ RASTGOUFARD
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Intelligent Detection of Voltage Instability in Power Distribution Systems
2007Real-life applications of intelligent systems that use neural networks require a high degree of success, usability and reliability. Power systems applications can benefit from such intelligent systems; particularly for voltage stabilization. Voltage instability in power distribution systems could lead to voltage collapse and thus power blackouts.
Adnan Khashman +2 more
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Quantifying proximity to voltage collapse using the Voltage Instability Predictor (VIP)
2000 Power Engineering Society Summer Meeting (Cat. No.00CH37134), 2002In previous work concerning the Voltage Instability Predictor (VIP), the proximity to voltage collapse (or instability) was expressed in terms of distance between two voltage curves or between two impedance curves. In this paper, a new measure, power margin, is introduced to describe the proximity to collapse in terms of power.
D.E. Julian +5 more
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Calculation of voltage fluctuations at the Gunn instability
The Journal of Chemical Physics, 1981Recent measurements of voltage fluctuations near the threshold of the Gunn instability in GaAs by Kabashima, Yamazaki, and Kawakubo yield a Gaussian distribution of fluctuations and an anomalous increase in the variance. These results confirm the qualitative predictions of the fluctuation–dissipation theory of molecular fluctuations.
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Co-ordination of Emergency Secondary-Voltage Control to Prevent Voltage Instability
IEE Proceedings: Generation, Transmission and Distribution, 1997The authors investigate emergency action in terms of secondary-voltage control and the system load shedding for prevention of voltage instability. Two modes of co-ordination of these control methods with corresponding models are proposed, and these are summarised into developed emergency-control algorithms.
Levi, Victor +2 more
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