Journal ArticleDOI
Estimating the Voltage Stability of a Power System
P. Kessel,H. Glavitsch +1 more
TLDR
In this article, a method for the online testing of a power system is proposed which is aimed at the detection of voltage instabilities, and an indicator L is defined which varies in the range between 0 (noload of system) and 1 (voltage collapse).Abstract:
A method for the online testing a power system is proposed which is aimed at the detection of voltage instabilities. Thereby an indicator L is defined which varies in the range between 0 (noload of system) and 1 (voltage collapse). Based on the basic concept of such an indicator various models are derived which allow to predict a voltage instability or the proximity of a collapse. The indicator uses information of a normal load flow. The advantage of the method lies in the simplicity of the numerical calculation and the expressiveness of the result.read more
Citations
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Journal ArticleDOI
The continuation power flow: a tool for steady state voltage stability analysis
TL;DR: In this paper, the authors present a method of finding a continuum of power flow solutions starting at some base load and leading to the steady-state voltage stability limit (critical point) of the system.
Journal ArticleDOI
Optimal power flow using particle swarm optimization
TL;DR: In this paper, an evolutionary-based approach to solve the optimal power flow (OPF) problem is presented. And the proposed approach has been examined and tested on the standard IEEE 30bus test system with different objectives that reflect fuel cost minimization, voltage profile improvement, and voltage stability enhancement.
Journal ArticleDOI
Voltage Stability Evaluation Using Modal Analysis
B. Gao,G.K. Morison,P. Kundur +2 more
TL;DR: In this paper, the voltage stability analysis of large power systems by using a modal analysis technique is discussed, using a steady-state system model, a specified number of the smallest eigenvalues and the associated eigenvectors of a reduced Jacobian matrix.
Journal ArticleDOI
Use of local measurements to estimate voltage-stability margin
TL;DR: In this article, a new data processing method is proposed to estimate the proximity to voltage collapse in real-time, which employs only local measurements-bus voltage and load current-and calculates the strength of the transmission system relative to the bus.
Journal ArticleDOI
Optimal power flow using gravitational search algorithm
TL;DR: Simulation results obtained from the proposed GSA approach indicate that GSA provides effective and robust high-quality solution for the OPF problem.
References
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Journal ArticleDOI
Relationship Between Voltage Instability and Multiple Load FLow Solutions in Electric Power Systems
TL;DR: In this paper, it has been confirmed analytically and by simulations that the multiple load flow solutions are likely to appear under the heavy-loaded conditions, and that the individual solutions of the solution pair have different features from each other, from the standpoint of stability, although they are close to each other.
Journal ArticleDOI
Quantitative Analysis of Steady State Stability in Power Networks
J. Jarjis,F. D. Galiana +1 more
TL;DR: In this article, a quantitative analysis of the steady state stability of a general network with arbitrary PV, PQ and slack buses is presented, and sufficient and necessary conditions for the stability of bus injections are derived.
Book ChapterDOI
Voltage collapse proximity indicators computed from an optimal power flow
J. Carpentier,R. Girard,E. Scano +2 more
TL;DR: In this paper, the authors used voltages in particular busses of the system as voltage collapse proximity indicators, but these values cannot be computed accurately and often the indicators warn too late, when voltage collapse is difficult to avoid.
Book ChapterDOI
Dynamic stability analysis taking into account load flow multisolutions and load characteristics
Y. Sekine,A. Yokoyama +1 more
TL;DR: In this article, it has been pointed out that these trends may cause voltage instability at the receiving end of long-distance transmission line and voltage instability is closely related to load flow multisolutions representing very close operating points.