Sampling Rate Impact on Estimation of Untransposed Transmission Line Parameters Based on Fault Records

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Costa, Eduardo C. M. da
Kurokawa, Sergio [UNESP]
Monaro, Renato M.
Di Santo, Silvio G.
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This paper highlights the sampling rate impact over an estimation method based on modal analysis techniques applied on untransposed three-phase transmission line. The analysed method represents a transmission system in the modal domain as three independent propagation modes that are modelled as three single-phase transmission lines using a suitable equivalent. The estimation procedure is carried out in the modal domain, without the explicit modelling of the phase mutual parameters, which means a significant simplification on the calculation process using the least-square solution method. Since the modal parameters are identified, the self- and mutual parameters can be calculated using the same modal transformation matrix during the line decoupling. The method estimation accuracy is evaluated for a range of sampling rate associated with the relays records.
Sampling rate, Parameter estimation, Line parameters, Synchronized measurements, Fault records
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Journal Of Control Automation And Electrical Systems. New York: Springer, v. 29, n. 3, p. 391-398, 2018.