Chaotic behavior of single machine infinite bus power system subjected to turbine torque ripple

Chaos is spread in several areas related to electrical engineering from load forecasting, power electronic system, power system, voltage collapse to catastrophic blackouts. Simulations with few simple circuit based experiments are reported in literature by several authors. Nevertheless it needs a broad study before one tries to analyze its impact and seriousness on existing complexity of system. Chaos in power system is evident from observed unpredictable behavior of components or system as a whole even if things were closely monitored and everything was known a priori. Chaos studies were introduced in recent past as a new science in engineering. Newtonian methods are undergoing paradigm shift to complexity science mathematics. Quantitative and qualitative analysis of chaos need to be explored in real time. Single Machine Infinite Bus power system behavior attracts chaotic behavior under the influence of turbine torque oscillation. Case study presented in the paper stresses upon the need of detailed investigation in three dimension domain to explore the possibility of existence of chaotic behavior owing to stochastic disturbance in turbine torque. Swing equation related to dynamics of turbine and rotor angle has potential origin of showing chaotic behavior when subjected to perturbations due to variation in ripple content of turbine torque. Three dimensional, large range investigations of perturbation lead to chaotic behavior at certain quiescent points only. Further investigations are sought related to origin of start of these strange attractor based chaotic behavior. Quantification of chaos using Lyapunov Exponent is already in use. But the root cause is unknown though tracking of chaos is possible.