DISTRIBUTED VOLTAGE OPTIMIZATION CONTROL STRATEGY FOR LARGE SCALE PHOTOVOLTAIC POWER STATIONS CONSIDERING UNIT VOLTAGE DROOP CHARACTERISTICS

Cheng Qiang; Li Haixiao; Bao Shiyuan; Yang Wei; Liu Lijuan; Zhang Lu

doi:10.19912/j.0254-0096.tynxb.2024-0598

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (8) : 411-422. DOI: 10.19912/j.0254-0096.tynxb.2024-0598

DISTRIBUTED VOLTAGE OPTIMIZATION CONTROL STRATEGY FOR LARGE SCALE PHOTOVOLTAIC POWER STATIONS CONSIDERING UNIT VOLTAGE DROOP CHARACTERISTICS

Cheng Qiang, Li Haixiao, Bao Shiyuan, Yang Wei, Liu Lijuan, Zhang Lu

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Abstract

Fluctuations in photovoltaic output can easily cause the system voltage to exceed the limit, so that effective voltage optimization control is required. Considering that traditional centralized control faces the problem of heavy communication burden, a distributed voltage optimization control strategy is proposed. In the construction of the voltage control optimization model, the influence of the unit voltage droop characteristics is considered, and the piecewise linearized P/Q-V droop curve is transformed into a set of mixed integer linear constraints to embed in the voltage control optimization model. In solving the voltage control optimization model, the traditional alternating direction multiplier method is improved to have "parallel update" and "asynchronous communication" capabilities to improve the efficiency of distributed optimization. Finally, the applicability of the proposed control strategy is verified by case analysis.

Key words

photovoltaic power / voltage control / parallel algorithms / alternating direction multiplier method / asynchronous communication

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Cheng Qiang, Li Haixiao, Bao Shiyuan, Yang Wei, Liu Lijuan, Zhang Lu. DISTRIBUTED VOLTAGE OPTIMIZATION CONTROL STRATEGY FOR LARGE SCALE PHOTOVOLTAIC POWER STATIONS CONSIDERING UNIT VOLTAGE DROOP CHARACTERISTICS[J]. Acta Energiae Solaris Sinica. 2025, 46(8): 411-422 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0598

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