Day to day operation and planning actions of power systems necessitates the prediction of the future electrical demand of its customers and prediction of load demand is called as Load Forecasting. Usually Load Forecasting is divided into short term, medium term, and long term forecasting. The short-term load forecasting refers to hourly prediction of the load for a time ranging from one hour to several days. The medium term load forecasting forecasts for a forecast horizon of one to several months ahead. The long term forecasting refers to forecasts prepared for one to several years in the future. Load Forecasting is more useful in planning of power systems i.e. Generation Expansion Planning, Transmission Expansion Planning, and Load Scheduling etc. In this paper, Long Term Load Forecasting is done for Southern Grid Indian Power System using Artificial Neural Networks (ANN). Load Forecasting is prepared for the proposed system for 11 years i.e. from year 2015 to year 2025.
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