Method for Judging Output Limit Value of Addition and Subtraction Force of Thermal Power Unit Based on Data Analysis

Abstract

For a high proportion of wind power connected to the power grid, if it is a dry season, the peak regulation of the power grid only depends on thermal power, but the upper and lower limits of thermal power regulation often do not match the actual situation. Therefore, the paper proposed to use the historical data of the output of the thermal power unit to dynamically calculate the upper and lower limits of the output of the thermal power unit, and obtained the margin of added and subtracted output forces of thermal power units, thus judging the critical state of energy storage input and wind abandonment in power grid, which providing a theoretical basis for predicting the capacity of thermal power units to add and subtract output forces, energy storage input and wind abandonment conditions. Combined with the actual example, the dynamic calculation the upper and lower limits of e output and total power generation of the thermal power unit are basically consistent with the given upper and lower limits value, indicating that the limits calculated by this method are in line with the actual requirements of the grid operation; The energy storage input and abandonment criteria proposed in the paper are also consistent with the actual operation of the power grid, and have practical guiding significance for the power grid with large-scale wind power access and large-scale energy storage.