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Prediction of instability separation modes and its application in practical dynamic security region

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分类：TP393.08[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术]
作者机构：[1]Key Laboratory of Power System Simulation and Control of Ministry of Education, Tianjin University, Tianjin 300072, China, [2]Electrical Power Research Institute, Palo Alto, CA 94303, USA
相关基金：Supported by National Natural Science Foundation of China （No.50595413）, Special Fund of the National Fundamental Research of China （No. 2004CB217904） and US EPRI trader Agreement EP-P29464/C9966, Foundation for the Author of National Excellent Doctoral Dissertation （No.200439）, Key Project of Ministry of Education of China（No. 105047）, Program for New Century Excellent Talents in University, Fok Ying Tung Education Foundation （No. 104019）, and Innovation Fund of Tianjin Municipal （2006-09）.
相关项目：基于广域信息的电力系统安全预警、保护和控制理论与方法

关键词：不稳定性分离模式, 动力安全领域, 运算法则, 网络安全, instability separation mode, dynamic security region, K-medoids algorithm, reachability Grammian

中文摘要：

动态安全区域(数据设置就绪) 的短暂批评边界能被一些亢奋的飞机接近与不稳定性分离模式相关。快预言不稳定性分离模式的一个方法在力量注射空间为数据设置就绪计算被建议。Themethod 由发达 K-medoids 算法识别协调产生组，拿从象这个索引的活动范围能力 Grammian 导出的一个类似矩阵。作为试验性的结果，在本地注射下面的活动范围能力 Grammian 矩阵是近似不变的。它显示发电机连贯鉴定为不同注射是将近一致的。Theninstability 分离模式能在正常操作点被预言，当平均起始的加速被看作修改错误的批评发电机组的措施时。而且基于这些预言的不稳定性分离模式，为数据设置就绪计算的批评的点搜索策略在批评发电机的减少的注射空间被说明。Theproposed 方法在决定实际数据设置就绪被改进用新英格兰测试系统，和计算精确性和速度被评估。

英文摘要：

The transient critical boundary of dynamic security region （DSR） can be approximated by a few hyper planes correlated with instability separation modes. A method to fast predict instability separation modes is proposed for DSR calculation in power injection space. The method identifies coherent generation groups by the developed K-medoids algorithm, taking a similarity matrix derived from the reachability Grammian as the index. As an experimental result, reachability Grammian matrices under local injections are approximately invariant. It indicates that the generator coherency identifications are nearly consistent for different injections. Then instability separation modes can be predicted at the normal operating point, while average initial acceleration is considered as the measure of the critical generator group to amend the error. Moreover, based on these predicted instability separation modes, a critical point search strategy for DSR calculation is illustrated in the reduced injection space of the critical generators. The proposed method was evaluated using New England Test System, and the computation accuracy and speed in determining the practical DSR were improved.

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