Design of a fast frequency modulation control system based on photovoltaic power station

Large scale photovoltaic power stations are connected to the power grid system, and their capacity proportion is higher and higher, which brings great challenges to the operation of power grid. It is urgent to present a kind of schedulability of photovoltaic power stations. At the same time, the fast response characteristics of photovoltaic inverter provide conditions for photovoltaic power station to have fast power regulation and support system fast frequency modulation function. This paper presents a coordinated control technology composed of automatic generation control (AGC) system at station level and active power frequency droop control with dead zone control to realize fast frequency regulation of photovoltaic power station in power grid. Finally, the feasibility and effectiveness of fast frequency modulation technology are verified by frequency disturbance and AGC coordination test in a photovoltaic power station in Shaanxi Province.