RESEARCH ON LVRT CONTROL MODE AND CONTROL PARAMETER IDENTIFICATION OF ELECTROMECHANICAL TRANSIENT MODEL OF PV INVERTER BASED ON MODE ALGORITHM

Xu Hengshan; Wang Siwei; Zhang Xujun; Li Chenyang; Huang Yongzhang

doi:10.19912/j.0254-0096.tynxb.2024-1242

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (11) : 308-318. DOI: 10.19912/j.0254-0096.tynxb.2024-1242

RESEARCH ON LVRT CONTROL MODE AND CONTROL PARAMETER IDENTIFICATION OF ELECTROMECHANICAL TRANSIENT MODEL OF PV INVERTER BASED ON MODE ALGORITHM

Xu Hengshan¹, Wang Siwei¹, Zhang Xujun², Li Chenyang¹, Huang Yongzhang³

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Abstract

To address the difficulty in obtaining control methods and parameters for low voltage ride through of photovoltaic inverters, which leads to limitations in establishing precise simulation models and analyzing grid-connection characteristics, a method for identifying the control methods and parameters of photovoltaic inverter electromechanical transient models is proposed based on the multi-objective differential evolution algorithm. First, the hardware in the loop test of the PV controller was carried out based on RT-LAB to obtain the LVRT cases required for parameter identification. Second, key points in the cases are extracted to establish the identification dataset, and the control parameters of the inverter in the specified power and specified current modes are identified separately using the MODE algorithm. An adaptive parameter tuning strategy and non-dominated sorting are introduced to improve the algorithm performance. Finally, the simulation results of LVRT cases under different control modes are compared to determine the control mode of the inverter. The results show that the proposed method can accurately identify the control methods and parameters of the photovoltaic inverter electromechanical transient model.

Key words

photovoltaic power generation / parameter identification / electric inverters / evolutionary algorithms / multiobjective optimization / low- voltage ride-through

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Xu Hengshan, Wang Siwei, Zhang Xujun, Li Chenyang, Huang Yongzhang. RESEARCH ON LVRT CONTROL MODE AND CONTROL PARAMETER IDENTIFICATION OF ELECTROMECHANICAL TRANSIENT MODEL OF PV INVERTER BASED ON MODE ALGORITHM[J]. Acta Energiae Solaris Sinica. 2025, 46(11): 308-318 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1242

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