EQUIVALENT MODELING OF DISTRIBUTED PHOTOVOLTAIC POWER STATIONS BASED ON LINE IMPEDANCE CLUSTERING

Zhang Yongxin; Li Fei; Zhang Liuchen; Wu Fan; Ma Mingyao; Zhang Xing

doi:10.19912/j.0254-0096.tynxb.2020-0911

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (5) : 312-318. DOI: 10.19912/j.0254-0096.tynxb.2020-0911

EQUIVALENT MODELING OF DISTRIBUTED PHOTOVOLTAIC POWER STATIONS BASED ON LINE IMPEDANCE CLUSTERING

Zhang Yongxin, Li Fei, Zhang Liuchen, Wu Fan, Ma Mingyao, Zhang Xing

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Abstract

In order to model a large-scale distributed photovoltaic power plant and analyze its operation characteristics, a clustering equivalent modeling method for distributed power plants is proposed in this paper. In this method, according to the distributed structure characteristics of the power plant, the equivalent line impedance of each photovoltaic power generation unit to the point of common coupling （PCC） is included as an extra index of the clustering. The clustering algorithm is then used to cluster each photovoltaic power generation unit into different classes and the multi-class photovoltaic units are aggregated to build a multi-machine equivalent circuits model. Canopy clustering algorithm was first used to pre-process the data before using the fuzzy C-means algorithm for clustering, so as to improve the disadvantage that the over-dependence on the initial clustering center may lead to the fuzzy C-means algorithm falling into local optimum. Finally, experiments based on RT-LAB real-time simulation platform are carried out to verify the rationality and accuracy of the proposed clustering equivalent model.

Key words

distributed power generation / PV power station / fuzzy clustering / equivalent circuits / simulation platform

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Zhang Yongxin, Li Fei, Zhang Liuchen, Wu Fan, Ma Mingyao, Zhang Xing. EQUIVALENT MODELING OF DISTRIBUTED PHOTOVOLTAIC POWER STATIONS BASED ON LINE IMPEDANCE CLUSTERING[J]. Acta Energiae Solaris Sinica. 2022, 43(5): 312-318 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0911

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