Use peak and valley electricity price energy storage project

As the share of renewable energy in the energy system increases, the peak-to-valley electricity price gap may widen due to the declining in the cost of renewable energy generation costs or narrow, or may narrow due to the increasing in grid dispatch costs .

To achieve this, an optimization model is constructed with the objective of minimizing average electricity costs under the prevailing time-of-use pricing policy. The comprehensive evaluation metrics is built using specific CO 2 emissions, average electricity cost, dynamic capital payback period, and energy self-sufficiency rate.

(1) represents the objective function, where the operational average energy cost for the park is calculated by dividing the total cost by the total electricity consumption. As each time slice has an interval, the quantity of electricity is calculated by multiplying the ten-minute average power by time interval.

Sun et al. analyzes the benefits for photovoltaic-energy storage-charging station (PV-ES-CS), showing that locations with high nighttime electricity loads and daytime consumption matching PV generation, such as hospitals, maximize benefits, while residential areas have the lowest.

The optimization results indicate that, while meeting the load demands, BESS needs to discharge during peak and off-peak electricity price periods and charge during valley-price periods to achieve the optimal unit electricity cost for the system, thereby maximizing peak-valley price differentials. Fig. 6.

If the peak-valley price differential increases, users are more inclined to expand the installation of BESS and adjust their electricity consumption strategies, achieving greater economic benefits.