Multi-dimensional Time Series Simulation of Large-scale Photovoltaic Power Plant Output Based on Hourly Clear Sky Index

被引:0
|
作者
Li G. [1 ]
Li X. [1 ]
Bian J. [1 ]
Niu J. [2 ]
Ding H. [3 ]
Chen W. [3 ]
机构
[1] Key Laboratory of Modern Electric Power System Simulation and Control & Renewable Energy Technology, Northeast Electric Power University, Ministry of Education, Jilin, 132012, Jilin Province
[2] Zhengzhou Power Supply Company, Zhengzhou, 450006, Henan Province
[3] China Electric Power Research Institute, Nanjing, 210003, Jiangsu Province
来源
关键词
Cluster analysis; Hourly clear sky index; Large-scale photovoltaic power generation; Multi-dimensional time series simulation;
D O I
10.13335/j.1000-3673.pst.2019.2679
中图分类号
学科分类号
摘要
The establishment of an accurate photovoltaic output time series model is of great significance for the planning and research of large-scale photovoltaic power system planning and operation. This paper proposes a multi- dimensional photovoltaic output series generation method based on the hourly sky index series, with which a large-scale photovoltaic power output simulation is performed, considering the spatial correlation characteristics of photovoltaic output between power stations. First, the hourly clear sky index series is calculated, in which the series of the photovoltaic theoretical output during sunrise and sunset is stabilized with the piecewise functions, so that the stabilized clear sky index series is used as an input for the vector auto-regressive (VAR) modeling. Secondly, a multi-step clustering algorithm is used to perform optimal spatial clustering of large-scale photovoltaic power plants on two spatial scales. The typical power plants and the variable ones are screened from the clustering for the multi-dimensional photovoltaic output sequence simulations so that the large-scale photovoltaic simulation time series is obtained. Finally, the actual measured data of the large-scale centralized photovoltaic power plants in Ningxia Hui Autonomous Region are used for simulation testing. The results show that compared with the traditional method, the multi-dimensional photovoltaic power output series generated by the method in this paper can better inherit the statistical characteristics, the probability distribution, and the autocorrelation characteristics of the original sequence, better restore the fluctuation characteristics of the photovoltaic power output, and improve the simulation accuracy for 28.06%, verifying the effectiveness of the method proposed in this paper. © 2020, Power System Technology Press. All right reserved.
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页码:3254 / 3262
页数:8
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