An Improved Spatiotemporal Time Series Modelling Procedure with  Application to Forecasting of Solar Radiation

Ravi Ranjan Kumar; Kader Ali Sarkar; Digvijaya Singh Dhakre; Debasis Bhattacharya

doi:10.56093/jisas.v78i02.171357

Authors

Ravi Ranjan Kumar Institute of Agriculture, Visva Bharati, Sriniketan
Kader Ali Sarkar Institute of Agriculture, Visva Bharati, Sriniketan
Digvijaya Singh Dhakre Institute of Agriculture, Visva Bharati, Sriniketan
Debasis Bhattacharya

https://doi.org/10.56093/jisas.v78i02.171357

Keywords:

Solar radiation; STARMA; ANN; Hybrid model; Spatial weight matrix; Forecasting

Abstract

The demand for energy and associated services to meet sustainable agricultural and economic growth and improve human health and lifestyle is increasing day by day. Hence, there is a need for systematic and scientific prediction of solar and other renewable sources of energy to meet these requirements. The main purpose of this study is to propose a hybrid Space-Time Autoregressive Moving Average Artificial Neural Network (STARMA-ANN) model for the precise and accurate forecasting of solar radiation for better planning and policy making. This approach has been implemented at seven geographical locations of Bihar in India. Spatial weight matrices have been used to describe all seven geographical locations and incorporated into the STARMA model to reflect the spatial and temporal correlation. To deal with nonlinear dynamics in the spatiotemporal data, ANN technique has been applied on residuals of the fitted STARMA model. The results have demonstrated that the proposed hybrid model performs better prediction accuracy than using conventional STARMA model, especially for spatiotemporal data with nonlinear characteristics of solar radiation.

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