Journal ArticleDOI
Some deficiencies in optimal power flow
TLDR
In this article, the use of equivalents causes errors, the methods for adjusting discrete variables are suboptimal, and the number of control actions is too large to be executed, and approaches for correcting them are discussed.Abstract:
Optimal power flow programs have deficiencies that limit their practical value and scope of application. Three of these deficiencies are: (1) the use of equivalents causes errors, (2) the methods for adjusting discrete variables are suboptimal; and (3) the number of control actions is too large to be executed. These deficiencies are explained, and approaches for correcting them are discussed. >read more
Citations
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Journal ArticleDOI
Optimal power flow by enhanced genetic algorithm
TL;DR: A number of functional operating constraints, such as branch flow limits, load bus voltage magnitude limits, and generator reactive capabilities, are included as penalties in the GA fitness function (FF).
Journal ArticleDOI
A survey of the optimal power flow literature
M. Huneault,Francisco D. Galiana +1 more
TL;DR: A survey of publications in the fields of optimal power flow and dispatching can be found in this article, where the authors suggest a classification of methods based on the choice of optimization techniques and a single flow-chart-type figure, which indicates the relationship between methods, their chronology, and their popularity.
Journal ArticleDOI
Security analysis and optimization
B. Stott,O. Alsac,A. Monticelli +2 more
TL;DR: This paper reviews present formulations and methods, and tries to point out areas of difficulty that constitute the main challenges for successful practical on-line implementations over the coming years.
Journal ArticleDOI
Further developments in LP-based optimal power flow
TL;DR: In this article, the authors describe developments that have transformed the LP (linear programming) approach into a truly general-purpose OPF (optimal power flow) solver, with computational and other advantages over even recent nonlinear programming (NLP) methods.
Journal ArticleDOI
State-of-the-art, challenges, and future trends in security constrained optimal power flow
Florin Capitanescu,J.L. Martinez Ramos,Patrick Panciatici,Daniel S. Kirschen,A. Marano Marcolini,L. Platbrood,Louis Wehenkel +6 more
TL;DR: In this paper, the main challenges to the security constrained optimal power flow (SCOPF) computations are discussed, focusing mainly on: approaches to reduce the size of the problem by either efficiently identifying the binding contingencies and including only these contingencies in the SCOPF or by using approximate models for the post-contingency states, and the handling of discrete variables.
References
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Journal ArticleDOI
Numerical Testing of Power System Load Flow Equivalents
TL;DR: In this paper, twenty one different versions of four topological load-flow equivalencing approaches have been tested on a number of power systems and the results of the tests provide a strong guide to the choice of specific equivalents for practical on-and off-line applications.
Journal ArticleDOI
Adaptive Reductions for Power Flow Equivalents
TL;DR: A method is given for computing matrix reductions for power flow equivalents that is many times faster than presently used methods and produces extremely sparse equivalents and it is possible to embed the method in a power flow solution algorithm so that equivalencing can be performed automatically and transparently.
Journal ArticleDOI
Contingency Selection of Branch Outages Causing Voltage Problems
TL;DR: In this article, the purpose of steady-state power system security analysis is to determine which contingencies cause component limit violations and also the severity of any such violations, and even if only single component contingencies were considered, even if fast solution methods were employed, full AC analysis of all cases could be prohibitively time consuming.
Journal ArticleDOI
A Hierarchical Approach to Reactive Volt Ampere (Var) Optimization in System Planning
W. M. Lebow,R. Rouhani,R. Nadira,Patrick Benedict Usoro,Raman K. Mehra,D. W. Sobieski,M. K. Pal,M. P. Bhavaraju +7 more
TL;DR: In this article, a two-level hierarchical approach for optimum allocation of reactive volt ampere (VAR) sources in large scale power system planning is presented, which takes advantage of the natural distinction between var dispatch in system operation and var allocation in system planning.