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Title: Structure-preservation model aggregation for two-stage inverters based large-scale photovoltaic system
Authors: Han, Yang
Lin, Xiangyang
Yang, Ping
Xu, Lin
Xu, Yan
Blaabjerg F.
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Han, Y., Lin, X., Yang, P., Xu, L., Xu, Y., & Blaabjerg, F. (2020). Structure-preservation model aggregation for two-stage inverters based large-scale photovoltaic system. IEEE Access, 8, 1824-1839. doi:10.1109/ACCESS.2019.2962303
Journal: IEEE Access
Abstract: With the increasing penetration level of large-scale photovoltaic (PV) generator connected to the grid, an accurate simulation model is required for the dynamic analysis of the PV system. However, the detailed electromagnetic simulation of the large-scale system is complex and the dynamic response capability is estimated with obstacle caused by large computational burdens. Therefore, a precise dynamic aggregated model is indispensable for the displacement of the large-scale PV system. The structure-preservation based aggregated model with comprehensive equivalent parameters for large-scale PV system is proposed in this paper. A complete two-stage PV system model is established to analyze the dynamics of the system. Then, the aggregation method is obtained by comparing the dynamic equations of the detailed model with the aggregated model, which is based on the energy relationship in the PV system. Furthermore, four different case studies are considered including the aggregation of identical and different ten parallel-connected PV units both under the same irradiance condition, and the aggregation of different ten parallel-connected PV units under different irradiance and weak grid scenarios, where the aggregation models are obtained through the proposed equivalent modeling method. Finally, the effectiveness of the proposed aggregation method is verified by the simulation results from PSCAD/EMTDC platform, and the consistency between the aggregated model and the detailed model is confirmed under different disturbances of irradiance variation, and continuous symmetric and asymmetric grid faults.
ISSN: 2169-3536
DOI: 10.1109/ACCESS.2019.2962303
Rights: © 2020 IEEE. This journal is 100% open access, which means that all content is freely available without charge to users or their institutions. All articles accepted after 12 June 2019 are published under a CC BY 4.0 license, and the author retains copyright. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles, or use them for any other lawful purpose, as long as proper attribution is given.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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