Method and device for speculating nominal height wind speed of power grid tower

The invention discloses a power grid tower nominal height wind speed speculation method and device. The method comprises the following steps: acquiring wind speed forecast data of a plurality of different heights; collecting wind speed data of 10-meter height of a meteorological station around a power grid tower and different height layers of an anemometer tower; determining surface stratum wind speed static power exponents under different wind power grades, and calculating first wind speed values of different height layers at the anemometer tower position and a first wind speed value at the nominal height of a power grid tower; determining the power exponent of the whole-layer wind speed of the surface layer, and calculating a second wind speed value; determining wind speed power exponents of different height layers of the surface layer, and calculating a third wind speed value; and calculating absolute errors of different heights, determining weights of the three wind speed values, and calculating the nomin