The "Guangdong Power Grid Primary Frequency Regulation Management Rules for Generators" stipulates that:the response time of primary frequency regulation should not be longer than 3s;the actual regulating variable of units output should reach at least 70% of the theoretical quantity within 45 seconds during which the grid frequency variation begins to exceed the unit primary frequency regulation dead band;settling time of primary frequency regulation should be less than 60 seconds.According to these

and to the actual contributing electricity quantity of unit primary frequency regulation(integral electricity of curve that unit output deviates from the original plan during the period that the frequency exceeds the limited value)

evaluation of primary frequency regulation function for the 600 MW ultra supercritical unit of Heyuan Power Plant was conducted

finding out problems such as low response speed and insufficient amplitude of frequency adjustment.Thus

the selection of frequency difference signal

the turbine main control

and load control logic of load were optimized.The actual response of frequency difference shows that

after improvement

the unit can meet the requirements of primary frequency regulation for Guangdong Power Grid.