研究目的
To propose and evaluate a method for determining and updating BESS charging/discharging schedules and generator unit commitments based on PV generation forecasts to reduce supply-demand imbalances and PV curtailment in power systems with extremely high PV integration.
研究成果
The proposed method effectively reduces energy shortfall and PV curtailment by updating BESS schedules and unit commitments based on PV forecasts, as demonstrated in one-year simulations. However, reductions are limited at very high PV capacities. Future work will extend the scheduling period and improve BESS operation to handle shortfalls.
研究不足
The method's effectiveness is limited when installed PV capacity is extremely large, particularly during seasons with strong irradiation, due to constraints in BESS charging and discharging. The BESS is not used for emergency control, and the initial and final states of charge are assumed identical each day, which may not be practical.
1：Experimental Design and Method Selection:
The study involves numerical simulations on a power system model of the Kanto area in Japan, using a method that updates BESS schedules and unit commitments every 6 hours based on day-ahead and intraday PV forecasts. Quadratic programming and dynamic programming are employed for optimization.
2：Sample Selection and Data Sources:
Hourly actual load demand data from the Kanto area in 2010, hourly actual solar irradiation data averaged over six sites in the Kanto area in 2010, and forecasted solar irradiation data from AIST using a mesoscale model.
3：List of Experimental Equipment and Materials:
A computer system for simulations, with software for numerical analysis (specifics not detailed).
4：Experimental Procedures and Operational Workflow:
Simulations are conducted for one year with a time unit of 1 hour, comparing three cases: base case (no updates), proposed case (updates every 6 hours), and reference case (perfect forecasts).
5：Data Analysis Methods:
Analysis of annual and monthly energy shortfall, PV curtailment, energy loss, and required BESS capacities using the simulation results.
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