Analysis of Large Disturbance Dynamic Stability Process

Abstract:

if the power system is disturbed by a large disturbance, its damping characteristics would change due to the nonlinear factor during the dynamic process and the redistribution of power flow after the accident operation mode. In this paper, the impact of operation mode after an accident and the nonlinear factor for large disturbance dynamic stability of grid are studied respectively. And then, by simulation comparison, it concludes that if nonlinear parts of automatic regulating devices have little impact on the grid damping characteristics after the grid suffers large disturbance, large disturbance dynamic stability of grid is mainly determined by the grid damping characteristics under operation mode after an accident. Finally, conclusions are verified through a practical operation mode of North China Power Grid according to simulation.

• Periodical: Applied Mechanics and Materials (Volumes 536-537)
• Pages: 1301-1305
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.536-537.1301
• Online since: April 2014
• Authors: Xun Gao, Jie Meng, Yi Qun Li, Ying Wang, Wen Chao Zhang
• Keywords: Dynamic Stability, Nonlinear Factors, Operation Mode after Accident

References

[1] Fang Zhu, Hongguang Zhao, Zenghuang Liu, Huizhen Kou, The Influence of Large Power Grid Interconnected on Power System Dynamic Stability [J]. Proceedings of the CSEE, 2007, 27(1): 1-7 (in Chinese).

[2] Fang Zhu, Yong Tang, Dongxia Zhang, Wenchao Zhang, Study on Dynamic Stability Problems of Ac Interconnected Area Power Grids in China and their Solutions[J]. Power System Technology, 2004, 28 (15): 1-5 (in Chinese).

[3] Dobson I, Zhang J, Greene S, et al. Is strong modal resonance a precursor to power system Oscillation, IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, 2001, 48(3): 340-349.

DOI: 10.1109/81.915389

[4] Gomes S, Jr, Martins N, Portela C. Computing small-signal stability boundaries for large-scale power systems. IEEE Transactions on Power Systems, 2003, 18(2): 747-752.

DOI: 10.1109/tpwrs.2003.811205

[5] Jiming Wang, Wenying Liu, Shuan-bao Niu. Study on damping characteristics of Xinjiang—Northwest power grid before and after interconnection [J]. Power System Protection and Control, 2010, 38(16): 92-98 (in Chinese).

DOI: 10.1109/appeec.2010.5448320

[6] Yong Tang. Fundamental Theory of Forced Power Oscillation in Power System [J]. Power System Technology, 2006, 30(10): 29-33 (in Chinese).

[7] Yanhui Xu, Renmu He, Zhiyong Han. The Cause Analysis of Turbine Power Disturbance Inducing Power System Low Frequency Oscillation of Resonance Mechanism [J]. Proceedings of the CSEE, 2007, 27(17): 83-87(in Chinese).

DOI: 10.1109/drpt.2008.4523581

[8] Zhengchun Du, Wei Liu, Wanliang Fang, Daozhi Xia, A Sparse Method for the Calculation of Critical Elgenvalue in Small Signal Stability Analysis[J]. Proceedings of the CSEE, 2005, 25(2): 17-21. (in Chinese).