Electric power peak regulation and frequency modulation combined clearing method based on marginal benefits

The invention relates to an electric power peak regulation and frequency modulation combined clearing method based on marginal benefits. The method comprises the steps of: acquiring the frequency modulation capacity required by a to-be-decided day, and clearing a frequency modulation unit of the frequency modulation capacity; acquiring the deep peak regulation capacity required by the to-be-decided day, and clearing a peak regulation unit of the peak regulation capacity; comparing a clearing result of the frequency modulation unit with a clearing result of the peak regulation unit, and determining whether a cross unit exists or not; if the cross unit exists, taking the cross unit as a frequency modulation unit and a peak regulation unit to determine corresponding frequency modulation marginal benefits and peak regulation marginal benefits; and if the peak regulation marginal benefit of the cross unit is higher than the frequency modulation marginal benefit, clearing the cross unit as a peak regulation unit, o