The distribution energy storage can ensure the stable use of the power station. Generally, photovoltaic power plants will generate more power when the sun shines during the day, and the power generation will peak when the sun shines brightly. At this time, the power generation is greater than the power consumption, and the inexhaustible power can be stored. , Of course, it is also popular to connect to the grid now, and use the surplus electricity spontaneously to go online. But if it is connected to the grid, when the photovoltaic power station does not generate electricity at night, it needs to use the electricity of the national grid. This does not have a great impact on ordinary households, but only the difference in electricity bills. However, for some places that must be powered on 24 hours a day, energy storage is particularly important.

For now, it is not necessary for household photovoltaics to be equipped with energy storage, and more grid-connected ones are chosen. If the energy storage technology cannot be broken through, more and more people will passively choose energy storage in the future. Because the installed capacity is increasing now, the national grid acceptance is limited. Therefore, those who want to install photovoltaic power plants and connect them to the grid should do so as early as possible.

energy storage

(1) Improve the reliability of power supply: in places such as hospitals, precision production lines, and data centers that require high power reliability, in the event of a power outage or typhoon, the energy storage can supply the stored energy to the end user. It avoids power interruption during the fault repair process to ensure continuous power supply for important loads.

(2) Peak and valley electricity price arbitrage: The most direct way for photovoltaic users to add energy storage capacity to realize value is to arbitrage peak and valley electricity prices. Users can charge their own energy storage battery at a cheaper valley electricity price when the load is low, and transfer part or all of the load to the self-owned energy storage battery when the load is peak. The profit it can obtain can be estimated by the sum of the peak electricity price minus the valley electricity price and the cost of energy storage. The size of the profit depends on the difference in peak and valley electricity prices and the size of the battery cost.

(3) Ensure the stability of power grid operation: my country’s photovoltaic installed capacity has grown rapidly in the past two years, and the penetration rate of photovoltaic power generation without energy storage has increased, which will inevitably affect the stability of the power grid. If the output of photovoltaic power generation is too large, there will inevitably be a phenomenon of backflow in the local power grid, which will increase the difficulty of power grid dispatching and affect the safety of power grid operation. The installation of energy storage batteries on the user side can form a buffer layer on the low-voltage side to absorb part of the photovoltaic power generation with excessive output, which is convenient for the dispatching department to control the power flow and ensure the stability of the power grid operation.