Photovoltaic output power smoothing control method and system capable of reducing capacity of energy storage system
A technology of output power and energy storage system, applied in the direction of reducing/preventing power oscillation, photovoltaic power generation, reducing greenhouse gases, etc., can solve the problems of waste, difficulty in realization, high cost and maintenance cost of energy storage equipment, etc., to meet the stability requirements , the effect of reducing complexity
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[0049] This example figure 2 as shown,
[0050] 1) For the surge of photovoltaic output power,
[0051] If it is obtained from the photovoltaic output power prediction technology that at t a1 There will be a surge in photovoltaic output power at any time, and the photovoltaic output power will be increased by the current P pv1 Surge to P pv2 , then the energy storage control system captures the median P of the two * . at P pv1 ~P * In the interval, according to the limit climbing rate The calculated reverse operation start time t c , that is, the discharge operation start time t 1 , according to the limited ramp rate R s Discharge the energy storage system first to free up enough space until the photovoltaic output power reaches P * ; at P * ~P pv2 In the interval, switch to charging mode, the previous discharge also provides sufficient capacity for charging at this time, and the energy storage system will follow the limited climbing rate R s Absorb excess ener...
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