Method for logic superposition of primary frequency modulation and monitoring system AGC

The invention relates to a method for the logic superposition of primary frequency modulation and monitoring system AGC. The method comprises the steps that when a frequency difference is generated bya power grid frequency, a speed regulator performs primary frequency modulation action, and a unit guide vane is controlled to perform opening action in an opening mode; a primary frequency modulation action power value of the speed regulator is sent to a monitoring system through a channel from the speed regulator to the monitoring system, AGC and primary frequency modulation superposition is carried out in the monitoring system, a power difference value is calculated through unit power feedback, and if the difference value exists, a speed regulator guide vane is controlled to be given, theguide vane opening degree is adjusted, and the unit power is adjusted through pulses; and the adjustment is finished until the difference value between the superposed power and the power feedback is 0, and the unit power close