The Research On The Criterion Of The Plants' Primary Frequency Performance

Power grid frequency performance is one of the major indexes in the power grid, sustaining the whole power grid frequency stable makes important sense. when routine work, the frequency should be sustain in the stretch of 50±0.2Hz.if the frequency of the power grid bias out of the scale, the client and the host equipments may be damaged, for example it may cause the engine exceed or below is normal rotation speed.Previously, cause adopting relatively undeveloped A standard and contact line control model, to comply A standard avoiding power inverse regulation and accidental exchange fine. Every control area usually ignores the plants' primary frequency regulation, and there are no standard and stipulation. Even out of there own interest locking the function of the primary frequency regulation. As the implement of the CPS standard, the contact line control model begins to adopt the advanced TBC model. The performance of the primary frequency regulation. Every control areas begin to emphasis on the primary frequency regulation performance of the plant in it. The research of the indexes of the plants' primary frequency regulation performance begins to hot pots.In the previous work, a new criterion has been depicted. The criterion depends on the relative scale of the functions of the frequency of the power grid and the power generated by the specific power plant to judge if the act of the plants benefits the recover of the frequency of the power grid. New criterion has two characters. First, this criterion is a index basing on the long term accumulated primary frequency regulation performance data; second, it can reflect accurately the status of the power units and the power units' regulation capacity.The simulation by matlab indicated that the new indexes created by the paper is effective. Still, to put the index into reality needs to solve several problems. Which is a arduous cause in the procedure of an AGC unit execute an secondary regulation actually the primary and the secondary regulation execute combined and the final executer of the act is the tap of the gas turbine(the fuel plant). These paper bases on the aimed curves of the secondary regulation of the units, with some regulation, pursue a method to get the power of the primary regulation. On the aspect of the determination of the mean time, this paper emphasize on the sample time of the power and the frequency, delay of the frequency and the bad date of SCADA system finally to determine a appropriate value.