1. Y. Ni, S. Chen, B. Sun. Theory and Analysis of Dynamic Power Systems. Beijing: Tsinghua University Press, 2002.
2. D. Song, X. Yang, Q. Ding, et al. A survey on analysis on low frequency oscillation in large-scale interconnected power grid and its control measures. Power System Technology, 2011, 35(10): 22–28.
3. Q. Wang, Y. Min, Y. Zhang. Mechanism analysis of ultra-low frequency interval oscillation. Relay, 2006(12): 63–68.
4. V. Venkatasubramanian, H. Schattler, J. Zaborsky. Dynamics of large constrained nonlinear systems-a taxonomy theory. Proceedings of the IEEE, 1995, 83(11): 1530–1561.
5. G. Wang, Z. Yu, Y. Zhang, et al. Troubleshooting and analysis of ultra-low frequency oscillation mode in power system. Power System Technology, 2016, 40(08): 2324–2330.