Analysis of Methods for Determining Frequency of the Main Harmonic in the Centralized Systems of Relay Protection and Automation

I. N. Lizunov, R. Sh. Misbakhov, R. G. Mustafin, V. V. Fedotov, I. Z. Bagautdinov, A. N. Funt, O. E. Naumov and V. V. Ivanov

Journal of Engineering and Applied Sciences 11 ( 6 ): 1257 - 1262 , 2016