Optimal Allocation of Dynamic VAR Support Using Mixed Integer Dynamic Optimization

Dynamic security of power systems is a major concern during contingencies, especially in present environment when there is inadequate transmission line capacity and dynamic reactive power support. This paper addresses dynamic VAR allocation to ensure acceptable transient voltage performance and shor...

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Bibliographic Details
Published in:IEEE transactions on power systems Vol. 26; no. 1; pp. 305 - 314
Main Authors: Tiwari, Ashutosh, Ajjarapu, Venkataramana
Format: Journal Article
Language:English
Published: New York IEEE 01.02.2011
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Branch and bound
collocation method
Contingency
Discretization
Dynamical systems
Dynamics
Filters
Mixed integer
mixed integer dynamic optimization
mixed integer nonlinear problem
Nonlinear dynamical systems
Nonlinear dynamics
Optimization
Power system dynamics
Power system security
Power system stability
Power system transients
Power transmission lines
Radau points
Reactive power
scatter search
Sensitivity analysis
severity index
simultaneous discretization
VAR
Voltage
ISSN:0885-8950, 1558-0679
Online Access:Get full text
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Description
Summary:Dynamic security of power systems is a major concern during contingencies, especially in present environment when there is inadequate transmission line capacity and dynamic reactive power support. This paper addresses dynamic VAR allocation to ensure acceptable transient voltage performance and short-term stability against severe contingency. To filter out severe contingency, severity indices are proposed. An algorithm based upon trajectory sensitivity analysis is used to select candidate VAR locations. The overall problem is formulated (in dynamic framework) as mixed integer dynamic optimization (MIDO). To solve MIDO problem, it is converted into mixed integer nonlinear problem (MINLP) by complete discretization using simultaneous discretization approach. The effectiveness of proposed approach is illustrated using New England 39-bus system.
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ISSN:0885-8950
1558-0679
DOI:10.1109/TPWRS.2010.2051342