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工程科学与技术:2013,45(4):163-170
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电力系统强迫振荡的同心松弛现象分析
(1.四川大学 电气信息学院;2.四川理工学院 自动化与电子信息学院)
An Analysis to the Concentric Relaxation Phenomenon of Power System Forced Oscillations
(1.School of Electrical and Info.,Sichuan Univ.;2.School of Automation and Electronic Info., Sichuan Univ. of Sci. and Eng.)
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投稿时间:2012-12-28    修订日期:2013-04-09
中文摘要: 为快速准确定位电力系统强迫功率振荡扰动源,提出强迫振荡平均耗散功率分布的同心松弛规律。在强迫振荡等幅振荡阶段,将系统中的频率偏差和功率偏差用相量表示。通过相量运算,推导了耗散能量分布的2条准则:节点注入平均耗散功率和为0,支路首末端平均耗散功率近似相等。再考虑电网相对于故障所具有的放射式结构,得出了平均耗散功率分布的同心松弛规律。10机39节点仿真验证了这一规律。同心松弛规律将有助于制定大电网强迫振荡扰动源快速定位策略,避免对扰动源的误判。
Abstract:The concentric relaxation phenomenon of the average power dissipation distribution was proposed in order to locate the source of power system forced oscillations fast and exactly.During the constant amplitude oscillation stage,the frequency deviations and power deviations were represented with phasors.Then two criterion of the distribution of average damped energy were deduced,in which the total power dissipation injected into a node is zero, and this power at the beginning and the end of a branch is nearly equal.The concentric relaxation pattern of average power dissipation distribution was inferred due to the radial structure of power grid.This pattern was verified by a simulation of 10-generator 39-bus system.The concentric relaxation pattern is helpful for drawing up a scheme for fast locating disturbing source of forced oscillation and avoiding the erroneous judgment.
文章编号:201201226     中图分类号:    文献标志码:
基金项目:国家自然科学基金资助项目(51037003);国家“863”高技术基金资助项目(2011AA05A119)
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杨毅强,刘天琪,李兴源,胡楠,赵睿.电力系统强迫振荡的同心松弛现象分析[J].工程科学与技术,2013,45(4):163-170.
Yang Yiqiang,Liu Tianqi,Li Xingyuan,Hu Nan,Zhao Rui.An Analysis to the Concentric Relaxation Phenomenon of Power System Forced Oscillations[J].Advanced Engineering Sciences,2013,45(4):163-170.