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Development of adaptive distance relay for statcom connected 220 kv transmission line with wavelet transform and ANN
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A new scheme to enhance the solution of the problems associated with Transmission line protection with Statcom connected is presented in this paper. Static Synchronous Compensator (STATCOM) is a shunt type FACTS device connected at the midpoint of the transmission line to maintain the voltage at desired level by injecting/absorbing the reactive power. This connection affects the performance of distance protection relay during line faults. The fault detection is carried out by using energy of the detail coefficients of the phase signals and artificial neutral network algorithm used for fault distance location for all the types of faults for 220 kv transmission line. For each type of fault separate neural network is prepared for finding out the fault location. An improved performance is obtained once the neutral network is trained suitably, thus performance correctly when faced with different system parameters and conditions.
Keywords
Fault detection, fault classification, wavelet Transform, statcom.
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