In order to analyze the primary frequency modulation function of the improved million kilowatt level pressurized water reactor nuclear power technology(CRP1000) turbogenerator set in China

the primary frequency modulation ability of the Arabelle turbine generator set

which has the largest number in operation at present

is preliminarily analyzed according to the characteristics of East China Power Grid and the primary frequency modulation demand of the grid connected unit. On the premise of ensuring the safety of the reactor

two units were selected to carry out the primary frequency modulation function test. The results show that

the primary frequency modulation response time

the primary frequency modulation stability time and the primary frequency modulation load response speed of the Arabelle nuclear turbine generator set under typical working conditions all meet the requirements of the primary frequency modulation rules of East China Power Grid. The response of the unit to large negative frequency difference on high power platform may lead to load rejection

which will bring adverse effects on the power grid. When the frequency difference of the power grid changes step by step

the primary frequency modulation response of the unit with large speed inequality rate is slow. It suggests that the primary frequency modulation strategy in different stages should be formulated according to the characteristics of each nuclear power unit.