Indian Journal of Science and Technology

Abstract

The main objective of this paper is a fundamental study of the nature of inter-area oscillations in power systems. Small-signal stability refers to the ability of a power system to maintain synchronism under small disturbances Instability may arise in two forms increase of rotor angle due to lack of sufficient synchronization torque and rotor oscillations of increasing amplitude due to lack of sufficient damping torque. To study small signal stability analysis synchronous machine model, transmission line model and two area system model and the dynamic state matrix eigenvalues and eigen vectors are constructed and the small signal stability analysis done with the developed algorithm. The 11 bus systems are considered here for study of oscillations. The effects of the system structure, generator modelling, excitation type, and system loads are discussed in detail. In the study, only small signal stability analyses are used to determine the characteristics of the system. In the power system leads to the development of many oscillations at low frequency in the power system. This paper presents the effect of the load model it was easier to identify unstable modes of oscillation.

Keywords: Power System Modeling, Eigen Value Analysis, Participation Factors, Small Signal Stability, TYPE-2B MODEL