DocumentCode :
2501446
Title :
A novel technique for determination of voltage stability margin
Author :
Nath, Siddhartha ; Pal, Shovon
Author_Institution :
Netaji Subhash Eng. Coll., Kolkata, India
fYear :
2010
fDate :
18-20 Oct. 2010
Firstpage :
1
Lastpage :
5
Abstract :
The growing concern about wide area power system disturbances and their impact on power systems have reinforced interest in the new generation of power system modelling. In recent years economical and environmental reasons have forced the transmission systems to be operated closer to their security limits. This has increased the importance of implementing suitable and efficient techniques for online monitoring and prediction of possible voltage collapse in the system prior to its occurrence. During large scale power system disturbance the last line of defense is the load shedding at the stations where the stability margin becomes dangerously low. To do this there is need to use automatic devices which process local signals, detect the decreased margin and activate the load shedding. In this paper a novel method for determination of voltage stability margin in power systems is presented. This method calculates the derivative of apparent power against the admittance. The application of artificial neural network for voltage stability evaluation is also proposed that could be used as early warning system to the power system operator so that necessary action could be taken in order to avoid occurrence of voltage collapse. The developed system has been tested using IEEE-14 bus reliability test system. The proposed technique is able to predict the voltage stability condition of a power system and therefore could be a valuable tool for fast real time voltage stability assessment.
Keywords :
load (electric); power system measurement; power system stability; artificial neural network; early warning system; large scale power system disturbance; load shedding; online monitoring; possible voltage collapse; power system operator; voltage stability assessment; wide area power system; Voltage stability; artificial neural network; power flow simulation;
fLanguage :
English
Publisher :
iet
Conference_Titel :
System Safety 2010, 5th IET International Conference on
Conference_Location :
Manchester
Type :
conf
DOI :
10.1049/cp.2010.0840
Filename :
5712344
Link To Document :
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