集中連系型太陽光発電システムにおける翌日連系点電力の計画・制御を可能とする蓄電池容量の検討

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  • Study on Battery Capacity for Grid-connection Power Planning with Forecasts in Clustered Photovoltaic Systems
  • シュウチュウレンケイガタ タイヨウコウ ハツデン システム ニ オケル ヨクジツレンケイテン デンリョク ノ ケイカク セイギョ オ カノウ ト スル チクデンチ ヨウリョウ ノ ケントウ

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This paper aims to clarify the battery capacity required by a residential area with densely grid-connected photovoltaic (PV) systems. This paper proposes a planning method of tomorrow's grid-connection power from/to the external electric power system by using demand power forecasting and insolation forecasting for PV power predictions, and defines a operation method of the electricity storage device to control the grid-connection power as planned. A residential area consisting of 389 houses consuming 2390 MWh/year of electricity with 2390kW PV systems is simulated based on measured data and actual forecasts. The simulation results show that 8.3MWh of battery capacity is required in the conditions of half-hour planning and 1% or less of planning error ratio and PV output limiting loss ratio. The results also show that existing technologies of forecasting reduce required battery capacity to 49%, and increase the allowable installing PV amount to 210%.

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