Theoretical Integrated Electric Quantity of Primary Frequency Control

Abstract

At present, the qualification rate of primary frequency control of hydropower units in the southwest power grid is low. The current grid has defects in the calculation method of the theoretical integral power of primary frequency control of hydropower units. The theoretical power of primary frequency control is proportional to the frequency difference. The adjustment rate is slow, and the deviation between the theoretical value and the actual value is large, which leads to a significant increase in the failure rate; by modeling the entire hydro-generator set adjustment system and performing the inverse Laplace transform of the simplified and reduced transfer function to obtain an exponential function, the theoretical integral power of Primary Frequency Control is calculated by this function, and the accuracy of the measured comparison is significantly higher, which is in line with the actual regulation law.