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http://dx.doi.org/10.5370/JEET.2015.10.4.1518

Research of the Mechanism of Low Frequency Oscillation Based on Dynamic Damping Effect  

Liu, Wenying (Electrical and Electronic Engineering Institute, North China Electric Power University)
Ge, Rundong (Electrical and Electronic Engineering Institute, North China Electric Power University)
Zhu, Dandan (Electrical and Electronic Engineering Institute, North China Electric Power University)
Wang, Weizhou (Gansu Electric Power Research Institute)
Zheng, Wei (Gansu Electric Power Research Institute)
Liu, Fuchao (Gansu Electric Power Research Institute)
Publication Information
Journal of Electrical Engineering and Technology / v.10, no.4, 2015 , pp. 1518-1526 More about this Journal
Abstract
For now, there are some low frequency oscillations in the power system which feature low frequency oscillation with positive damping and cannot be explained by traditional low frequency oscillation mechanisms. Concerning this issue, the dynamic damping effect is put forward on the basis of the power-angle curve and the study of damping torque in this article. That is, in the process of oscillation, damping will dynamically change and will be less than that of the stable operating point especially when the angle of the stable operating point and the oscillation amplitude are large. In a situation with weak damping, the damping may turn negative when the oscillation amplitude increases to a certain extent, which may result in an amplitude-increasing oscillation. Finally, the simulation of the two-machine two-area system verifies the arguments in this paper which may provide new ideas for the analysis and control of some unclear low frequency phenomena.
Keywords
Low frequency oscillation mechanism; Damping torque; The dynamic damping effect;
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Times Cited By KSCI : 2  (Citation Analysis)
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