Open Access

ARTICLE

Reactive Power Flow Convergence Adjustment Based on Deep Reinforcement Learning

by Wei Zhang¹, Bin Ji², Ping He¹, Nanqin Wang¹, Yuwei Wang¹, Mengzhe Zhang^2,*

1 Nanjing Power Supply Company of State Grid Jiangsu Electric Power Co., Ltd., Nanjing, 210019, China
2 College of Energy and Electrical Engineering, Hohai University, Nanjing, 210098, China

* Corresponding Author: Mengzhe Zhang. Email:

Energy Engineering 2023, 120(9), 2177-2192. https://doi.org/10.32604/ee.2023.026504

Received 08 September 2022; Accepted 28 November 2022; Issue published 03 August 2023

Abstract

Power flow calculation is the basis of power grid planning and many system analysis tasks require convergent power flow conditions. To address the unsolvable power flow problem caused by the reactive power imbalance, a method for adjusting reactive power flow convergence based on deep reinforcement learning is proposed. The deep reinforcement learning method takes switching parallel reactive compensation as the action space and sets the reward value based on the power flow convergence and reactive power adjustment. For the non-convergence power flow, the 500 kV nodes with reactive power compensation devices on the low-voltage side are converted into PV nodes by node type switching. And the quantified reactive power non-convergence index is acquired. Then, the action space and reward value of deep reinforcement learning are reasonably designed and the adjustment strategy is obtained by taking the reactive power non-convergence index as the algorithm state space. Finally, the effectiveness of the power flow convergence adjustment algorithm is verified by an actual power grid system in a province.

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Keywords

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