Wind power plant generating capacity monitoring method and system based on power grid

The invention is suitable for the technical field of wind power evaluation, and provides a wind power plant generating capacity monitoring method and system based on a power grid, and the method comprises the steps: obtaining the current-day predicted wind speed data and current-day predicted wind direction data of a power plant, and a layout diagram of a wind generating set; calculating first generating capacity according to the current-day predicted wind speed data and the current-day predicted wind direction data, substituting the first generating capacity into a generating capacity formula of the wind turbine generator to generate a first line graph, obtaining real-time generating capacity, and comparing the first line graph with the actual generating capacity; acquiring real-time wind speed data and real-time wind direction data, substituting the data into a generating capacity formula of the wind turbine generator to generate a second broken line graph, and comparing the second broken line graph with th