7VU K T,LIU C C.Shrinking stability regions and voltage collapse in power systems.IEEE Trans on Circuits and Systems I:Fundamental Theory and Applications,1992,39 (4):271-289.
8IMTHIAS T P A,NAGENDRA P S R,SASTRY P S.Reinforcement learning controllers for automatic generation control in power systems having reheat units with GRC and dead-band.International Journal of Power and Energy Systems,2006,26(2):137-146.
9ZHUSUBALIYEV Z T,SOUKHOTERIN E A.Oscillations in a relay control system with hysteresis and time dead zone.Mathematics and Computers in Simulation,2002,58 (4/5/6):329-350.
10VENKATASUBRAMANIAN V,SCHATTLER H,ZABORSZKY J.Local bifurcations and feasibility regions in differential-algebraic systems.IEEE Trans on Automatic Control,1995,40(12):1992-2013.