Research on Frequency Modulation Control Strategy and Economic Dispatch Model Based on Multi-source Fusion

Aiming at the problem of decreasing frequency regulation capability of multi-source integrated power grids with increasing penetration rate of new energy, this paper proposes a joint frequency regulation method based on traditional conventional unit frequency regulation and supplemented by new energy field stations and energy storage power stations. The frequency modulation dead zone is used as the division interval of the joint frequency modulation strategy, so that the joint frequency modulation of multi-source generators can be applied to the daily operation of the power grid. At the same time, establish a multi-objective joint economic dispatch model that takes into account the cost of frequency modulation, frequency stability indicators and the main operator’s income, convert the frequency stability indicators into a penalty cost function, and use the Mixed Integer Linear Programming (Mixed Integer Linear Programming, MILP) method to solve the model . Finally, the simulation results of a calculation example show that the joint scheduling model can effectively reduce the system scheduling cost and increase the revenue.