Journal ArticleDOI
Voltage stability indices for stressed power systems
TLDR
In this paper, the use of static voltage stability indices based on a singular value decomposition of the power flow Jacobian matrix and matrices derived from the Jacobian matrices is discussed.Abstract:
The use of static voltage stability indices based on a singular value decomposition of the power flow Jacobian matrix and matrices derived from the Jacobian matrix is discussed. It is shown that such indices, together with the singular vectors, contain substantial and important information about the proximity to voltage instability and also about critical buses and disturbances from a voltage instability point of view. This is done by a theoretical analysis of the linear power flow equations and an analysis from model power systems as well as realistic power systems (1033 nodes). It is argued that indices based on these matrices are useful for the system analyst in planning and operations planning. >read more
Citations
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Journal ArticleDOI
New methods for computing a closest saddle node bifurcation and worst case load power margin for voltage collapse
Ian Dobson,L. Lu +1 more
TL;DR: In this paper, the authors proposed new iterative and direct methods to compute load powers at which bifurcation occurs and which are locally closest to the current operating load powers.
Journal ArticleDOI
Decision Tree-Based Online Voltage Security Assessment Using PMU Measurements
Ruisheng Diao,Kai Sun,Vijay Vittal,R.J. O'Keefe,M.R. Richardson,Navin Bhatt,D. Stradford,S. Sarawgi +7 more
TL;DR: In this article, an online voltage security assessment scheme using synchronized phasor measurements and periodically updated decision trees (DTs) is presented. But the DTs are first trained offline using detailed voltage security analysis conducted using the past representative and forecasted 24-h ahead operating conditions.
Journal ArticleDOI
Voltage stability analysis using generic dynamic load models
Wilsun Xu,Y. Mansour +1 more
TL;DR: In this article, the authors investigated the dynamic nature of voltage stability using a generic load model representing the dynamic behaviour of aggregate loads, and revealed the mechanism of voltage collapse by examining the interaction of load dynamics with the supply network.
Journal ArticleDOI
Bibliography on voltage stability
Venkataramana Ajjarapu,B. Lee +1 more
TL;DR: A comprehensive list of books, reports, workshops and technical papers related to voltage stability and security can be found in this article, where the authors provide a comprehensive overview of the literature.
Journal ArticleDOI
A new optimal reactive power scheduling method for loss minimization and voltage stability margin maximization using successive multi-objective fuzzy LP technique
TL;DR: In this paper, an optimal reactive power scheduling method is sought which minimizes real power transmission loss and maximizes voltage stability margin (VSM) subject to the utmost satisfaction of all the violated load bus voltage constraints.
References
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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
Fast calculation of a voltage stability index
TL;DR: In this article, a fast method to calculate the minimum singular value and the corresponding (left and right) singular vectors is presented, which only requires information available from an ordinary program for power flow calculations.
Journal ArticleDOI
Towards a theory of voltage collapse in electric power systems
Ian Dobson,Hsiao-Dong Chiang +1 more
TL;DR: In this paper, the authors described the loss of stability when a stable equilibrium point disappears in a saddle node bifurcation and presented a simple model of the system dynamics after the bifurecation.
Journal ArticleDOI
A method to compute reactive power margins with respect to voltage collapse
TL;DR: In this paper, a method of computing the reactive power margin (i.e., the difference between the maximum reactive load and the corresponding base case value) for a given set of load buses of a power system is proposed.
Journal ArticleDOI
Investigation of the load-flow problem
L.L. Freris,A. M. Sasson +1 more
TL;DR: A mesh approach is developed for the formulation of the network equations in load-flow analysis, and is shown to converge at least as fast as the usual methods using the nodal-impedance matrix.