Detection of Capacitor Switching Transients and L-G Fault Transients by Implementing Wavelet Transform

Abstract

Abstact: In a electrical power system, whenever the voltage goes below the desired level,there is no need to improve the voltage profile. This increasing voltage can be obtained by using capacitor bank/s, as switching ON a capacitor bank/s causes increase in voltage while switching OFF a capacitor bank/s causes decrease in voltage. But these switching action, if not specifically controlled give rise to transients which are undesirable and hazardous for the power system. This introduces a voltage disturbance detection approach [1] identifies voltage disturbance, and[2] discriminate the type of event which has resulted in the voltage disturbance, e.g. either a fault or a capacitor switching incident. Feasibility of the proposed disturbance detection approach is demonstrated based on digital time domain simulation of a distribution power system using the PSCAD software package. Finally by using wavelet transform discriminate the type of event on the basic of energy levels. The demand for educational and awareness programs are recommended in order to contribute and increase the use of online transaction in the sultanate. Keyword: Capacitor switching,, distribution system, L-G,PSCAD wavelet transform, transient analysis.