电力系统低频振荡监测的Duffing振子可停振动系统法

Abstract
Figure/Table
References
Related Citation (2)

Download: PDF (550 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The measurement signals are represented as a typical nonlinear and non-stationary random process. The main characteristics of low-frequency oscillation (LFO) lie in that, both the appearance time of oscillation mode and the lasting time are uncertain, and the amplitude damping changes with time. Therefore, before parameter identification, whether the sustained and stable LFO is or not should be determined. The high approval methods for LFO analysis are not suitable for such situation. Then, a new method is proposed to monitor LFO based on order stopping oscillation system of duffing oscillator. The state of order stopping oscillation system of duffing oscillator is highly sensitive to periodic perturbation while it is quite insensitive to random small perturbation. The measured data used as the excitation (input signal), were put into order stopping oscillation system, and then the phase trajectories of system were obtained. Small perturbations’ phase trajectory converged to the focal point, whose state is order stopping oscillation. The existence of LFO attractor was obtained by phase trajectory of weak damping mode and forced oscillation, javascript:void(0);while LFO caused by negative damp existed LFO repellor. Thus, according to the change of phase trajectory, whether there is a steady-state LFO can be judged, and the mode and damping characteristic can also be judged correctly. It is very significant in fast and accurate alarming, rationally selecting the oscillation suppression measures, and quickly suppressing the oscillation. Processing and characteristics of LFO were showed by using the method of graphic visualization, and then logarithm distance with equilibrium point provides a method of quantitative analysis.

Key words： Order stopping oscillation system of duffing oscillator low-frequency oscillation monitoring attractor repellor

Received: 17 January 2014 Published: 30 October 2015

PACS:

TM712

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Zhao Yan
	Li Zhimin
	Li Tianyun

Cite this article:

Zhao Yan,Li Zhimin,Li Tianyun. Duffing Oscillator Order Stopping Oscillation System Method for Monitoring of Low-Frequency Oscillation in Power System[J]. Transactions of China Electrotechnical Society, 2015, 30(20): 159-167.

URL:

https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I20/159

[1] 智勇, 王官宏, 肖洋, 等. 750kV线路投运后甘肃电网动态稳定性分析[J]. 电力系统保护与控制, 2011, 39(3): 114-118.
Zhi Yong, Wang Guanhong, Xiao Yang, et al. Dynamic stability analysis of Gansu power grid after 750kV lines was put into operation[J]. Power System Protection and Control, 2011, 39(3): 114-118.
[2] 李勋, 龚庆武, 贾晶晶, 等. 基于原子稀疏分解的低频振荡模态参数辨识方法[J]. 电工技术学报, 2012, 27(9): 124-131.
Li Xun, Gong Qingwu, Jia Jingjing, et al. Atomic sparse decomposition based identification method for low-frequency oscillation modal parameters[J]. Trans- actions of China Electrotechnical Society, 2012, 27(9): 124-131.
[3] 贾勇, 何正友. 基于受扰轨迹的低频振荡分析方法综述[J]. 电力系统保护与控制, 2008, 40(11): 140-148.
Jia Yong, He Zhengyou. Review on analysis methods for low frequency oscillations based on disturbed trajectories[J]. Power System Protection and Control, 2008, 40(11): 140-148.
[4] 汪永华, 王正风. 电网动态监测预警与辅助决策系统的应用与发展[J]. 电力系统保护与控制, 2010, 38(10): 70-74.
Wang Yonghua, Wang Zhengfeng. Application and development of dynamic monitoring preventive alarm and auxiliary decision system[J]. Power System Protection and Control, 2010, 38(10): 70-74.
[5] 马燕峰, 赵书强. 基于在线辨识和区域极点配置法的电力系统低频振荡协调阻尼控制[J]. 电工技术学报, 2012, 27(9): 117-123.
Ma Yanfeng, Zhao Shuqiang. Coordinated damping dontrol of power pystems low-frequency oscillation based on on-line identification and region poles assignment[J]. Transactions of China Electrotechnical Society, 2012, 27(9): 117-123.
[6] 戚军, 江全元, 曹一家. 采用时滞广域测量信号的区间低频振荡阻尼控制器设计[J]. 电工技术学报, 2009, 24(6): 154-159.
Qi Jun, Jiang Quanyuan, Cao Yijia. Design of damping controller for inter-area low-frequency oscillation using time-delay wide-area measurements[J]. Transactions of China Electrotechnical Society, 2009, 24(6): 154-159.
[7] Demello F. Concepts of synchronous machine stability as affected by excitation control[J]. IEEE Transactions on Power Apparatus and Systems, 1969, 88(4): 316-329.
[8] 汤涌. 电力系统强迫功率振荡的基础理论[J]. 电网技术, 2006, 30(10): 29-33.
Tang Yong. Fundamental theory of forced power oscillation in power system[J]. Power System Technology, 2006, 30(10): 29-33.
[9] 王铁强, 贺仁睦, 徐东杰, 等. 电力系统低频振荡机理的研究[J]. 中国电机工程学报, 2002, 22(2): 21-25.
Wang Tieqiang, He Renmu, Xu Dongjie, et al. The mechanism study of low frequency oscillation in power system[J]. Proceedings of the CSEE, 2002, 22(2): 21-25.
[10] 杨东俊, 丁坚勇, 邵汉桥. 基于WAMS的负阻尼低频振荡与强迫功率振荡的特征判别[J]. 电力系统自动化, 2013, 37(13): 57-62.
Yang Dongjun, Ding Jianyong, Shao Hanqiao. WAMS based characteristic discrimination of negative damping low-frequency oscillation and forced power oscillation[J]. Automation of Electric Power Systems, 2013, 37(13): 57-62.
[11] 周薛雪, 赖莉, 罗懋康. 基于分数阶可停振动系统的周期未知微弱信号检测方法[J]. 物理学报, 2013, 62(9): 1-13.
Zhou Xuexue, Lai Li, Luo Maokang. A new detecting method for periodic weak signals based on fractional order stopping oscillation system[J]. Acta Physic Sinica 2013, 62(9): 1-13.
[12] 朱卫秋. 非线性随机动力系统与控制[M]. 北京: 科学出版社, 2003.
[13] 张芷芬, 丁同仁, 黄文灶, 等. 微分方程的定性理论[M]. 2版. 北京: 科学出版社, 1997.
[14] Kundur P. Power System Stability and Control [M]. NewYork: McGraw-Hill, 1994.
[15] 李兴源, 刘红超, 任晓莹, 等. 天生桥-广州交直流并联运行对贵州电网的影响[R]. 贵州省电力工业局, 1997.
[16] 刘红超, 李兴源. 基于PRONY辨识的交直流并联输电系统直流阻尼控制的研究[J]. 中国电机工程学报, 2002, 22(7): 54-57.
Liu Hongchao, Li Xingyuan. Study of DC damping control in AC/DC transmission systems based on prony method[J]. Proceedings of the CSEE, 2002, 22(7): 54-57.
[17] Ni J M, Shen C, Liu F. Estimation of the electromechanical characteristics of power systems based on a revised stochastic subspace method and the stabilization diagram[J]. Science China Technological Sciences 2012, 55(6): 1677-1687.