To surely smooth fluctuation of output to a power system due to distributed power supply such as a wind power generation system and a solar power generation system by preventing shortage of power accumulation or full charging of a power accumulator.
A distributed power supply system 10 consisting of distributed power supply 9, a power fluctuation smoothing apparatus 1 and a power converter 15 is connected to a power system 12, a controller 4 of the power fluctuation smoothing apparatus 1 is composed of an output detector 5, an accumulated power detector 6, a target value setting device 7 for setting a target output value, and a charge/discharge controller 8 for controlling a charger/ discharger 3. An output of the distributed power supply 9 and amount of accumulated power of a power accumulator 2 are detected. A running average value in the preset period of an output of the distributed power supply 9 is compensated with an output target adjusting value which is preset depending on the amount of accumulated power to set an output target value to the side of the power system 12. When an output of the distributed power supply 9 is larger than the output target value, an extra power is used to charge the power accumulator 2. When an output is smaller than the output target value, shortage is compensated with the power discharged from the power accumulator 2 until the output to the side of power system 12 reaches the output target value.
| WO/2020/208188 | OPTIMIZATION OF ENERGY UTILIZATION IN SOLAR POWERED FREEZER OR COOLER SYSTEM |
| JP5322792 | Photovoltaic circuit |
| JP2023094759 | POWER SYSTEM |
MIYAJIMA KATSUTOSHI
KUBO HIROMASA
MOROTOMI NORIYUKI
HIRANO TAKESHI
DAIHEN CORP
Next Patent: SECONDARY BATTERY DEVICE