SELF-EXCITED OSCILLATIONS IN SERIES AND SHUNT COMPENSATION SCHEMES OFAC TRANSMISSION-SYSTEMS

A new mathematical model is presented for analysis of self-excited osc illations in a synchronous machine connected to a long EHV transmissio n 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 sel f-excited oscillations in a transmission system for five types of comp ensation scheme. The stability limit curves in the R-X-c parametric pl ane for the five compensation schemes have been compared with that for a series compensated transmission line. (C) 1997 Elsevier Science Ltd .