Abstract:
Aiming at the problem that the energy storage station has a single operation mode under the existing configuration and cannot fully utilize the energy storage function, this paper presented a novel control strategy which combines smoothing photovoltaic fluctuation mode and peak-valley electricity price arbitrage mode. For the mode of smoothing photovoltaic fluctuation, the internal power of the energy storage system is initially allocated by wavelet packet decomposition, and then combined with the state of charge of the energy storage device, the primary power is adjusted to realize power redistribution. For the mode of peak-valley electricity price arbitrage, according to the time-of-use price and state of battery charge information, the charging and discharging start and stop time of the energy storage system is determined, and then the charging and discharging power is determined according to the actual size of the load to realize the economic operation of the power load. According to the real-time fluctuation of PV, combined with the state of charge of the energy storage device, a coordinated operation strategy of two operating modes was designed to realize the reasonable management of source/network/load/storage energy. Finally, a simulation model was built in Matlab to verify the accuracy and practicability of the proposed control strategies, and then applied those strategies to the demonstration project.