D. R. Yu and J. Y.Xu, “The Effects of Governor On The Stability of Turbo-Generator,” Power System Automation, Vol. 20, No. 1,1996, pp.23-26.
 Z. Y. Han, Y. H. Xu, Y. Li and C. Q. Wu, “Power System Low Frequency Oscillation of Resonance Mechanism Induced by Disturbance of Turbine-Governing System,” Shaanxi Electric Power, Vol. 7, 2009, pp. 1-5.
 G. H. Wang and X. Huang, “Influence of Turbine Governor Parameters on Power System Damping,” Electric Power Automation Equipment, Vol. 31, No. 4, 2009, pp. 87-90.
 Y. Wang, Y. S. Wang and Z. H. Li, “Model and Nonlinear Analysis of 300MW Steam Turbine Speed Control System,” Steam Turbine Technology, Vol. 49, No. 1, 2007, pp. 17-20.
 G. X. Miao, “Parameter Identification of Steam Turbine Digital Electro-hydraulic Control System and Application,” Baoding: north China electric power university, 2004.
 H. Q. Lv, Y. Su, J. Y. Yang and Z. X. Li, “The Nonlinear Characteristics of Electro-hydraulic Servo System and Its Effect Analysis,” Machine Tool and Hydraulics, 2002.
 D. R. Yu, W. Bo and W. T. Ju, “The Effects of Nonlinear Characteristics of Steam Turbine Governor System on The Torsional Stability,” Steam Turbine Technology, Vol. 33, No. 5, 1997, pp. 257-261.
 C. D. Vournas, “Unstable Frequency Oscillation in a Slow-Response Reheat-Turbine Generator,” IEEE Transactions on Automatic Control, 1998.
 Z. P. Zhou, “First Frequency Modulation Delimitation for Electric System Stabilization Analyze,” Henan Electric Power, Vol. 3, 2009, pp. 40-45.
 Y. S. Hao, L. N. Zeng and Y. H. Yang, “Analysis of The Influence of Governor Back-lashon GPSS,” North China Electric Power University Acta, Vol. 4, 1992, pp. 1-6.