Coordination control method for light-storage combined participation in primary frequency modulation of power grid

Abstract

The invention discloses a coordination control method for light-storage combined participation in the primary frequency modulation of a power grid, and the method comprises the steps of modeling a photovoltaic power generation system and an energy storage system, and obtaining a photovoltaic power generation system model and an energy storage system model; enabling the photovoltaic power to participate in power grid frequency modulation through a dynamic variable load shedding method changing along with system output and frequency; on the basis of coordinated droop control and positive and negative virtual inertia control, adopting the energy storage combined frequency modulation based on an energy storage variable coefficient adaptive control strategy to set the energy storage capacity, so that the inertia response matched with a synchronous generator set can be provided, and the coordination control over the primary frequency modulation of a light storage supporting power grid is achieved. According to the present invention, the inertia and frequency response capability of the light storage system can be improved, the frequency modulation and energy storage capacity maintaining effect can be considered, comprehensive benefits can be brought into play, and the utilization rate of new energy is improved while the stability level of the system is improved.

Description

technical field [0001] The invention belongs to the field of new energy grid-connected frequency stability, and relates to a primary frequency modulation control method, in particular to a coordinated control method in which optical storage jointly participates in primary frequency modulation of a power grid. Background technique [0002] With the substantial increase in the penetration rate of photovoltaic power generation, the frequency regulation characteristics under power system fault disturbances deteriorate significantly. In order to improve the utilization rate of photovoltaics, photovoltaic power generation generally works at the maximum power point, does not provide inertia support and does not consider the necessary energy reserves, and has extremely limited support for the voltage and frequency of the grid. Considering the active supporting effect on the system, it is particularly urgent to involve photovoltaic power generation in the frequency and voltage regula...

AI Technical Summary

Problems solved by technology

At present, there are few studies involving the coordination of photovoltaic storage in large power grids to participate in primary frequency regulation, and an effective technical solution is urgently needed to solve the existing technical problems

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