Photovoltaic power forecasting using statistical methods: impact of weather data
- Author(s): Maria Grazia De Giorgi 1 ; Paolo Maria Congedo 1 ; Maria Malvoni 1
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View affiliations
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Affiliations:
1:
Department of Engineering for Innovation, University of Salento, Via per Monteroni, 73100 Lecce, Italy
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Affiliations:
1:
Department of Engineering for Innovation, University of Salento, Via per Monteroni, 73100 Lecce, Italy
- Source:
Volume 8, Issue 3,
May 2014,
p.
90 – 97
DOI: 10.1049/iet-smt.2013.0135 , Print ISSN 1751-8822, Online ISSN 1751-8830
An important issue for the growth and management of grid-connected photovoltaic (PV) systems is the possibility to forecast the power output over different horizons. In this work, statistical methods based on multiregression analysis and the Elmann artificial neural network (ANN) have been developed in order to predict power production of a 960 kWP grid-connected PV plant installed in Italy. Different combinations of the time series of produced PV power and measured meteorological variables were used as inputs of the ANN. Several statistical error measures are evaluated to estimate the accuracy of the forecasting methods. A decomposition of the standard deviation error has been carried out to identify the amplitude and phase error. The skewness and kurtosis parameters allow a detailed analysis of the distribution error.
Inspec keywords: power system identification; power system measurement; statistical analysis; power system management; neural nets; load forecasting; regression analysis; power grids; power engineering computing; photovoltaic power systems; time series
Other keywords: meteorological variable measurement; time series; kurtosis parameter; power 960 kW; amplitude error identification; ANN; photovoltaic power forecasting; skewness parameter; multiregression analysis; Italy; grid-connected photovoltaic system; phase error identification; Elmann artificial neural network; PV system; power production prediction; weather data impact; statistical method; decomposition; power system management
Subjects: Other topics in statistics; Other topics in statistics; Power system measurement and metering; Solar power stations and photovoltaic power systems; Power system planning and layout; Neural computing techniques; Power system management, operation and economics; Power engineering computing
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