The calculation method for primary frequency regulation index in Liaoning power grid was investigated.Rule based primary frequency regulation optimal control algorithm and logic design scheme were put forward.For digital electro-hydraulic(DEH)system and unit coordinated control(UCC)system

several functions were added

such as dynamic correction for unequal rate function gain

nonlinear correction for flow instruction of primary frequency feedforward component

and dynamic separation of main steam pressure deviation in turbine main control.The optimal debug methods for primary frequency regulation using the synchronized phasor measurement unit(PMU)data from power dispatching center were summarized.By this control algorithm

the simulated test and application of primary frequency regulation under unit full load condition was conducted.The results showed that the unit load track was sensitive

and the load regulation amplitude deviationβ3was 16.9%

which dramatically satisfied the requirement(lower than 25%)of primary frequency regulation index.