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Commutation Failure Analysis Considering the Frequency Response of Transmission Line

This paper studies the impact of the transmission line frequency response on commutation failure (CF) and points out that the different frequency response of transmission line leads to different CF mitigation capability. Based on the commutating voltage time area theory, the double-tuned damped filter of 2nd and 3rd characteristic harmonics is added to the system to increase the CF mitigation capability. Simulation results based on the PSCAD/EMTDC show that the CF mitigation capability with different transmission line frequency response and the improvement of CF mitigation capability with the double-tuned damped filter.