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基于圖卷積神經網絡的機組組合問題加速求解方法

來源：電工電氣發布時間：2024-04-07 09:07 瀏覽次數：641

基于圖卷積神經網絡的機組組合問題加速求解方法

曾貴華，劉明波

(華南理工大學電力學院，廣東廣州 510640)

摘要：針對傳統的精確優化算法求解規模較大的機組組合問題面臨時間可行性的挑戰, 提出了一種基于圖卷積神經網絡的機組組合問題加速求解方法。將機組組合問題構建為一個混合整數線性規劃模型，根據分支定界法的求解原理，將分支策略定義為從候選變量的特征到候選變量得分的映射關系；提出在離線階段使用圖卷積神經網絡來模擬強分支策略的決策行為，并將學習到的映射關系應用到在線分支過程中，從而加速分支定界法求解機組組合問題。通過 IEEE 39 節點 10 機組和 IEEE 118 節點 54 機組系統的算例分析，驗證了所提方法的有效性。

關鍵詞： 發電機；機組組合；分支定界法；分支策略；圖卷積神經網絡

中圖分類號：TM744 文獻標識碼：A 文章編號：1007-3175(2024)03-0044-07

Acceleration Solving Method for Unit Commitment Problem Based on

Graph Convolution Neural Network

ZENG Gui-hua, LIU Ming-bo

（School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China）

Abstract: To solve the challenge of time feasibility faced by traditional accurate optimization algorithms for solving large-scale Unit Commitment (UC) problems, this paper proposes an accelerated solution method for solving the UC problems based on graph convolution neural network. Firstly, the UC problem is constructed as a Mixed Integer Linear Programming (MILP) model. Next, according to the solution principle of the branch-and-bound method, we define the branching strategy as a mapping relationship from the features of candidate variables to the scores of candidate variables. Thus, we propose to mimic the decision-making behavior of strong branching strategy in the offline phase using Graph Convolutional Neural Network (GCNN) and apply the learned mapping relationship to the online branching process to accelerate the process of the branch and bound method to solve the UC problem. Finally, the effectiveness of the proposed method is verified by the analysis of IEEE 39-node 10-unit and IEEE 118-node 54-unit systems.

Key words: generator; unit commitment; branch and bound method; branch strategy; graph convolution neural network

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基于圖卷積神經網絡的機組組合問題加速求解方法