Prediction of Node Importance of Power System Based on ConvLSTM

Xu Wu, Junqi Geng, Meng Liu, Zongxun Song and Huihui Song
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Xu Wu: School of New Energy, Harbin Institute of Technology, Weihai 264209, China
Junqi Geng: Zibo Power Supply Company, State Grid Shandong Electric Power, Ltd., Zibo 255000, China
Meng Liu: Weihai Power Supply Company, State Grid Shandong Electric Power, Ltd., Jinan 264200, China
Zongxun Song: Electric Power Research Institute, State Grid Shandong Electric Power, Ltd., Weihai 250003, China
Huihui Song: School of New Energy, Harbin Institute of Technology, Weihai 264209, China

Energies, 2022, vol. 15, issue 10, 1-12

Abstract: In power systems, the destruction of some important nodes may cause cascading faults. If the most important node in the power system can be found, the important node can be protected in advance, thereby avoiding a blackout accident. At present, the evaluation algorithm of node importance is calculated based on the power flow of the power grid, so the calculation results must be lagging behind, and it does not have the ability to provide early warning for the power grid to provide protection signals. Therefore, it is necessary to predict the importance of nodes in the power system. After using a reasonable prediction model to predict the importance of nodes, we can simulate the future state of power system operation and avoid accidents for the dispatching agency of the power grid company according to the prediction results. This paper proposes a prediction model based on convolutional long short-term memory (ConvLSTM) to predict the importance of nodes. This method has obvious advantages over the long short-term memory (LSTM) network. The convolution operation is used to replace the original full connection operation of the LSTM network, which not only utilizes the advantages of convolution to extract spatial features but also retains the ability of LSTM to process time-series features. The simulation results show that the prediction of node importance using the ConvLSTM network is much more accurate than LSTM. Using statistical indicators to compare and analyze the prediction results, it can be seen that ConvLSTM has higher prediction accuracy. Therefore, using the ConvLSTM model to predict node importance has certain significance for grid dispatching agencies to accurately simulate the future state of the power system and avoid risks in advance.

Keywords: prediction; power system node importance; ConvLSTM; LSTM (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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