Primary frequency modulation control method for thermal power unit based on frequency modulation load instruction compensation

The invention relates to a primary frequency modulation control method for a thermal power unit based on frequency modulation load instruction compensation. In the process of a thermal power unit participating in AGC (Automatic Generation Control) and primary frequency modulation of a power grid, a primary frequency modulation load instruction is calculated by using a frequency deviation or speeddeviation signal of the power grid, and the primary frequency modulation load instruction is supplemented according to the load control deviation before primary frequency modulation triggering and thefrequency modulation power reference. At the same time, primary frequency modulation priority control is realized through the reverse locking of a load instruction and turbine control output, DEH feed-forward, de-aerator regulating valve and de-superheating water regulating valve control instructions, and the locking is reset according to the main steam pressure control deviation, the de-aeratorwater level control deviati