Emergency Control Strategy for Transient Angle Instability of Power System Based on Improved AlexNet

被引：0
|
作者：
Qiang Z. [1 ]
Wu J. [1 ]
Li B. [1 ]
Zhang R. [1 ,2 ]
Qin L. [1 ]
Hao L. [1 ]
机构：
[1] School of Electrical Engineering, Beijing Jiaotong University, Beijing
[2] Institute of Science and Technology, China Three Gorges Corporation, Beijing
来源：
Gaodianya Jishu/High Voltage Engineering | 2022年 / 48卷 / 07期
关键词：
deep CNN; emergency control; improved AlexNet; power system; sensitivity; transient angle instability;
D O I：
10.13336/j.1003-6520.hve.20210114
中图分类号：
学科分类号：
摘要：
With the increase of new energy penetration, the power grid environment is increasingly complex, and the safe and stable operation of power system is also facing new challenges. In order to satisfy the real-time emergency control after power system transient angle instability, an emergency control strategy based on improved AlexNet is proposed by combining deep learning with emergency control. Firstly, the power angle trajectories of unstable generators are predicted based on the improved AlexNet to identify critical generators. Then, the sensitivity of emergency control action is defined, and the improved AlexNet sensitivity prediction model is established to fit the mapping relationship between power angle characteristics and the sensitivity, so as to determine the action bus of emergency control. Finally, the emergency control optimization model is established and the strategy is solved with the goal of minimum capacity of the generator tripping and load shedding, and an example is given to verify the model in New England 10 machine 39 bus system. The results show that both the power angle trajectory prediction model and the emergency control sensitivity prediction model based on deep learning have high prediction accuracy. The emergency control strategy formulated on this basis can enable the unstable system to quickly return to stable operation and to strengthen the security and stability defense system of power grid. © 2022 Science Press. All rights reserved.
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页码：2794 / 2804
页数：10
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