Self-excited oscillations in series and shunt compensation schemes of ac transmission systems

Abstract A new mathematical model is presented for analysis of self-excited oscillations in a synchronous machine connected to a long EHV transmission line with different configurations of series and shunt compensation. The model has been developed in terms of line constants of long lines which includes the effect of line shunt susceptance and reactance of line end transformers. The model has been used to directly analyse self-excited oscillations in a transmission system for five types of compensation scheme. The stability limit curves in the R-X c parametric plane for the five compensation schemes have been compared with that for a series compensated transmission line.