The Fast Estimation of the Electromechanical Oscillation Frequency

Abstract:

Analyzing stability of power system mainly relates to the model of machine, which can be simulated by two order and damping coefficient D (D represents mechanical damping and electrical damping), but there is no standard which can illustrate how much the damping coefficient D is. Usually power flow, excitation system, PSS and prime mover system affect the total damping largely, but have little impact on the electromechanical oscillation frequency. Firstly the paper theoretically proves the correctness of calculating electromechanical inherent frequency with system matrix. Secondly considering the damping ration characteristic of power system, the feasibility of estimating the electromechanical oscillation frequency with electromechanical inherent frequency is analyzed. With different models, the simulation results demonstrate that the electromechanical oscillation damping is affected very largely, but the frequency is affected little, which proves the effectiveness of the system matrix analysis method.

• Periodical: Applied Mechanics and Materials (Volumes 385-386)
• Pages: 1135-1140
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.385-386.1135
• Online since: August 2013
• Authors: Zhi Duan, Hai Bao, Ling Wang, Gang Liu, Xiao Ming Han
• Keywords: Damping, Electromechanical Oscillation Frequency, Inherent Frequency, System Matrix

References

[1] Zhun Zhenqing. Excitation control and power system stability [M]. Beijing: Water Power Press, (1994).

[2] Wang Xifan, Fang Wanliang, Du Zhengchun. Modern power system analysis [M]. Beijing: Science Press, (2003).

[3] Han Zhenxiang, Wu Guohuo. Power system analysis [M]. Zhejiang: Zhejiang University Press, (1997).

[4] Yu Yaonan. Dynamic power system [M]. Beijing: Water Power Press, (1985).

[5] Xie Guanmo. Vibration mechanics [M]. Beijing: National Defence Industry Press, (2007).

[6] Ni Zhenhua. Vibration mechanics [M]. Xi'an: Xi 'an Jiaotong University Press, (1989).

[7] Wang Pin, Jin Jiang. Engineering mechanics [M]. Beijing: Science Press, (2006).

[8] Shen Hong, etc. The dynamic stability report of power system in China [M]. Beijing: Electric Power Research Institute of China, (2012).

[9] Qiu Qirong. Matrix theory and its application [M]. Beijing: China Electric Power Press, (2008).

[10] Ni Yixin, Chen Shousun, Zhang Baolin. The theory and analysis of dynamic power system [M]. Beijing: Tsinghua University Press, (2002).

[11] Ma Daqiang. The electromechanical transient process of power system [M]. Beijing: Water Power Press, (1988).

[12] Han Yingduo. The optimal decentralized coordination control of power system [M]. Beijing: Tsinghua University Press, (1997).