Active frequency response method of photovoltaic power plant based on load shedding control
The traditional photovoltaic power generation system usually operates at the maximum power operation point,does not respond to the change of grid frequency,and cannot provide active power to suppress the change of grid frequency.With the increase of photovoltaic permeability,the safe and stable operation of the grid will be affected.In this paper,load shedding control is adopted to realize the response to system frequency without changing the main circuit structure,grid connection strategy of inverter and adding energy storage equipment.First,the current maximum power operation point is obtained by setting the master-slave array to achieve load shedding control.By setting the corresponding relationship between frequency and load shedding rate,the change of active power output for frequency change is achieved,and the system is provided with active power support.Finally,the effectiveness of the results is verified through simulation on the hardware in the loop simulation platform.
photovoltaicload shedding controlfrequency response controlactive support
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