Attenuation of harmonics utilizing new control strategies for the SVC in Brazilian power system

Abstract

Due to the high level of compensation with parallel reactors and series capacitors at the 500 kV transmission lines that interconnect the South and North regions of Brazil (from Serra da Mesa to Imperatriz substation), and the long distance compensation with parallel reactors at the South-East/North-East interconnection, harmonic resonances around 120 Hz and others occur in this region. This concerns directly to the SVC of Bom Jesus da Lapa (BJL), since this Power Electronic Compensator is capable of responding in this frequency range. This paper shows the capability of the SVC to attenuate harmonic resonances.

A synchronverter to damp electromechanical oscillations in the Brazilian transmission grid

“…Dynamic equivalents were developed in PSCAD/EMTDC, which permit the representation of the verified electromechanical oscillations between the systems North, Northeast and South/Southeast/Midwest, besides a model for the synchronverter at BJL (250 MVAr) and the transmission lines were represented by its pi-equivalents based on public data on the website of the National System Operator (ONS) for the connections North/South and Southeast/Northeast [4] [5]. This work was partially supported by the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES).…”