voltage profile improvement by reactive power injection using fuzzy inference system
Prem Prakash,Vimla Kumari,R.C. Jha
Published in International Journal of Advanced Research in Electrical and Electronics Engineering
ISSN: 2321-4775 Impact Factor:1.6 Volume:2 Issue:1 Year: 10 March,2014 Pages:79-84
Abstract
With the increasing load, power systems are becoming indefensible to voltage instability. Voltage instability is a major concern for the secure and reliable operation of the power system. Voltage instability causes a progressive and uncontrollable decline in voltage. The main factor causing instability of the system is the inability of the power system to meet the demand of reactive power. Deficiency of reactive power support causes the bus voltage deviation from the allowed limits at the buses. The main focus is to raise the overall voltage of the system to avoid voltage instability. One of the methods to achieve this is by reactive power support. In this paper a fuzzy inference system based approach is used for determining the amount of reactive power to be injected at more sensitive buses in a network. Depending on the severity of the contingency, voltage sensitivity and the voltage of the buses during contingency, the amount of reactive power to be injected is decided. Sensitivity assessment is done to find out the lines which are most sensitive to instability. This approach is tested on IEEE 24 bus system.
Kewords
contingency assessment, voltage sensitivity, performance indices, FIS.
Reference
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