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

• Autor(a) principal: Costa, Eduardo C. M. da
• Data de Publicação: 2018
• Outros Autores: Kurokawa, Sergio [UNESP], Monaro, Renato M., Di Santo, Silvio G.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1007/s40313-018-0378-7; http://hdl.handle.net/11449/166116
• topic: Sampling rate; Parameter estimation; Line parameters; Synchronized measurements; Fault records

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.