Szukana fraza: [Abstrakt = "Geostatistical methods were applied to forecasting area \- time \(3D\) electrical power demand. Spatial analyses based on node load data for two kinds of electrical power networks, i.e. the 220\/400 kV network covering the whole area of Poland and the 110 kV network for a selected subarea of Poland, were carried out. The 20\-year power variation structure for the two kinds of networks was analyzed using the directional variogram function. Power demand forecasts for 1 year and 5 years were made using ordinary block kriging. The results of the power estimation and forecasting of averages Z\* and the estimation standard deviation ok show that the employed techniques are useful and effective. Therefore they arc recommended for use by power firms."]

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