2025年7月26日 周六
Home > Archive>Volume 39, Issue 6, 2024 >162-173. DOI:10.19781/j.issn.1673-9140.2024.06.017
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Transient stability analysis and parameter optimization of PV grid‑connected systems considering LVRT
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Affiliation:

(1.Electric Power Research Institute，State Grid Jiangxi Electric Power Co., Ltd., Nanchang 330096, China; 2.School of Electrical Engineering，Southwest Jiaotong University，Chengdu 610031，China; 3.State Grid Jiangxi Electric Power Co., Ltd., Nanchang 330096, China)

Clc Number:

TM712

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    Abstract:

    Improper setting of control parameters during low voltage ride-through (LVRT) in photovoltaic (PV) grid-connected systems can easily cause their own disconnection, especially when large-scale PV grid connection exacerbates the degree of power electronics in the power system, which can significantly reduce the transient stability of the system. To improve the transient stability of the system, firstly, based on the operating mode of the PV grid-connected system during voltage drop, vector plots are used to analyze the transient stability characteristics of the system during the duration of the fault. Secondly, the single objective linear programming method is used to describe the absolute stability interval of active current command under transient stability constraints, and based on this interval, the geometric analysis method is used to determine the optimal interval of control parameters of the PV grid-connected system. Finally, simulation analysis is conducted on the actual power grid structure of a certain region in Jiangxi Province to verify the effectiveness of the proposed parameter optimization method in improving the transient stability of the system.

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陈 波,张权旺,刘 柳,周 宁,叶钟海,苏永春,戈田平,朱晓娟.计及LVRT的光伏并网系统暂态稳定性分析与参数优化研究[J].电力科学与技术学报英文版,2024,39(6):162-173. CHEN Bo, ZHANG Quanwang, LIU Liu, ZHOU Ning, YE Zhonghai, SU Yongchun, GE Tianping, ZHU Xiaojuan. Transient stability analysis and parameter optimization of PV grid‑connected systems considering LVRT[J]. Journal of Electric Power Science and Technology,2024,39(6):162-173.

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  • Online: February 14,2025
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