| Prediction of Instability Separation Modes and Its Application in Practical Dynamic Security Region |
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| 作者姓名： | 曾沅 余贻鑫 王红梅 闵亮 张沛 LEE S T |
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| 作者单位： | Key Laboratory of Power System Simulation and Control of Ministry of Education Tianjin University，Key Laboratory of Power System Simulation and Control of Ministry of Education Tianjin University，Key Laboratory of Power System Simulation and Control of Ministry of Education Tianjin University，Key Laboratory of Power System Simulation and Control of Ministry of Education Tianjin University，Electrical Power Research Institute，Electrical Power Research Institute，Tianjin 300072 China，Tianjin 300072 China，Tianjin 300072 China，Tianjin 300072 China，Palo Alto CA 94303 USA，Palo Alto CA 94303 USA |
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| 基金项目： | 国家自然科学基金;教育部重点计划项目 |
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| 摘 要： | The dynamic securityregion(DSR) is definedas are-gionininjectionspacein whicha power systemwill betran-siently stable for a given fault1].The DSRis usually de-noted asΩd(i,j,F) ,whereiandjdenote the networkstructures of pre-fault and post-fault ,respect…
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| 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 |
| 修稿时间： | 2006-10-11 |
Prediction of Instability Separation Modes and Its Application in Practical Dynamic Security Region |
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| ZENG Yuan,YU Yixin,WANG Hongmei,MIN Liang,ZHANG Pei,LEE S T.Prediction of Instability Separation Modes and Its Application in Practical Dynamic Security Region[J].Transactions of Tianjin University,2007,13(3):157-162. |
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| Authors: | ZENG Yuan YU Yixin WANG Hongmei MIN Liang ZHANG Pei LEE S T |
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| Institution: | 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 |
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| Abstract: | 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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| Keywords: | instability separation mode dynamic security region K-medoids algorithm reachability Grammian |
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