Photovoltaic absorption and peak-valley arbitrage optical storage system and control method thereof

The invention relates to a photovoltaic absorption and peak-valley arbitrage light storage system and a control method thereof, the light storage system comprises an energy management system, and a photovoltaic power generation unit, an energy storage system, a load unit and an intelligent electric meter which are respectively connected with the energy management system, and the energy storage system is composed of at least one energy storage unit; the energy management system firstly obtains the operation information of a photovoltaic power generation unit and each energy storage unit, and then analyzes the difference value between the current electricity consumption power and the reported demand power in real time, and combines the time-of-use electricity price period, the photovoltaic power generation power and the current state of the energy storage unit. Coordination control is carried out on each energy storage unit according to a preset peak-flat-valley period under the condition that the demand power