Title :
Time domain approach compared with direct method of Lyapunov for transient stability analysis of controlled power system
Author :
Cecati, Carlo ; Latafat, Hamed
Author_Institution :
Dept. of Ind. & Inf. Eng., & Econ., Univ. of L´´Aquila, L´´Aquila, Italy
Abstract :
This paper attempts to study the transient stability of a two machine infinite bus system when affected by large disturbances, by comparison of time domain approach vs. transient energy function. Then the decentralized nonlinear controller is embedded within the power system and simulation results show that the transient stability has been greatly enhanced. Based on the existing transient energy function of uncontrolled power system, the controlled power system has been represented as a forced Hamiltonian system. The Lyapunov function which is suitable for transient stability analysis of this controlled power system has been used for stability assessment. Simulations in different operating points show the enhancement of transient stability of power system with controller in both time domain approach and energy function method.
Keywords :
Lyapunov methods; nonlinear control systems; power system control; power system transient stability; time-domain analysis; Lyapunov direct method; Lyapunov function; decentralized nonlinear controller; forced Hamiltonian system; power system control; stability assessment; time-domain approach; transient energy function; transient stability analysis; two-machine infinite bus system; Generators; Numerical stability; Power system stability; Stability analysis; Time domain analysis; Transient analysis; Lyapunov; Transient stability; decentralized nonlinear controller; direct method; energy function; power system; time domain approach;
Conference_Titel :
Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM), 2012 International Symposium on
Conference_Location :
Sorrento
Print_ISBN :
978-1-4673-1299-8
DOI :
10.1109/SPEEDAM.2012.6264637
