DISTRIBUTED NON-CONVEX OPTIMIZATION METHOD FOR SYSTEM VOLTAGE OF LARGE-SCALE PHOTOVOLTAIC POWER STATIONS BASED ON TWO-LEVEL ALTERNATING DIRECTION METHOD OF MULTIPLIERS

Yang Xin; Li Haixiao; Bao Shiyuan; Yang Chao; Hou Ziqiang; Zeng Xianming

doi:10.19912/j.0254-0096.tynxb.2025-0650

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (9) : 179-191. DOI: 10.19912/j.0254-0096.tynxb.2025-0650

DISTRIBUTED NON-CONVEX OPTIMIZATION METHOD FOR SYSTEM VOLTAGE OF LARGE-SCALE PHOTOVOLTAIC POWER STATIONS BASED ON TWO-LEVEL ALTERNATING DIRECTION METHOD OF MULTIPLIERS

Yang Xin¹, Li Haixiao^1,2, Bao Shiyuan^1,2, Yang Chao^1,2, Hou Ziqiang¹, Zeng Xianming¹

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Abstract

To address voltage limit violations caused internally in large-scale photovoltaic （PV） power stations, this paper proposes a distributed non-convex optimization method for system voltage based on an enhanced two-level alternating direction method of multipliers （E-TL-ADMM）. First, the method establishes a non-convex voltage optimization model for large-scale PV systems, incorporating nonlinear Distflow power flow constraints. Second, by introducing a nested inner and outer loop structure, the E-TL-ADMM overcomes the limitations of traditional ADMM, such as poor convergence and insufficient accuracy, to achieve superior voltage control results. Validation based on a typical large-scale PV power station case demonstrates that： when solving the system non-convex optimization problem, the E-TL-ADMM significantly outperforms the traditional ADMM in optimality with average error reduction exceeding 0.17%; it also exhibits clear convergence advantages under high-accuracy residual threshold conditions, with optimized voltage results effectively ensuring PV station system voltage safety.

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photovoltaic power / voltage control / nonlinear systems / enhanced two-level alternating direction method of multipliers

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Yang Xin, Li Haixiao, Bao Shiyuan, Yang Chao, Hou Ziqiang, Zeng Xianming. DISTRIBUTED NON-CONVEX OPTIMIZATION METHOD FOR SYSTEM VOLTAGE OF LARGE-SCALE PHOTOVOLTAIC POWER STATIONS BASED ON TWO-LEVEL ALTERNATING DIRECTION METHOD OF MULTIPLIERS[J]. Acta Energiae Solaris Sinica. 2026, 47(9): 179-191 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0650

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