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Impact on Generator Reactive Power Limits on a Static Voltage StabilityCALDERON-GUIZAR, J. G. , TOVAR-GONZALEZ, E. A.
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generator capability curve, load flow, singular value decomposition, static voltage stability, maximum loadability
power(14), voltage(10), stability(9), syst(6), hill(5), system(4)
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About this article
Date of Publication: 2011-11-30
Volume 11, Issue 4, Year 2011, On page(s): 105 - 110
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2011.04017
Web of Science Accession Number: 000297764500017
SCOPUS ID: 84856622151
Voltage stability margin in a power system is closely related with the availability of reactive power in the system. Therefore, adequate modeling of the reactive power sources becomes an important issue in this type of studies. The Minimum Singular Value of the load flow Jacobian matrix has been commonly used as a static voltage stability index. In this paper, such index is used to assess the influence on the static voltage stability limit of modeling the generators reactive power limits by its capability curve. Simulation results on a test system indicate that modeling the reactive power limits of the generating units by the simplified Qmin/Qmax approach, commonly used by most of the load flow programs, yields optimistic values for this voltage stability index.
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