Equivalentes de redes no domínio de fases.

Abstract

Due to the complexity and size of modera power systems, a detailed transmission system representation requires a heavy computational effort for digital simulations in electromagnetic transient studies. For large system representations, the region of great interest in the studies is represented in detail and the remaining system is represented by network equivalents. Criteria such as accuracy, computational efficiency and stability must be satisfied in equivalent models and these models must be easily integrated into transient calculation routines. The present work proposes the network equivalent representations based on time-domain fitting, which stability and passivity constraints are included in the fitting process to determine the equivalent network parameters. Contributions to the field of network equivalent representations in the phasedomain are presented. Results are presented for network equivalents in the phase-domain to four-port and six-port cases, which allow the representation of two-phase and threephase transmission lines, respectively. Sparse representations are presented. Sparse network equivalents to three-port case are obtained to three-phase system representations, considering the internai sources in the externai system.