Full Solution of Four Typical Systems of Photovoltaic + Energy Storage
With the implementation of energy storage policies and energy storage incentives in China, photovoltaic practitioners have gradually begun to talk about photovoltaic + system from talking about photovoltaic + system. This article introduces several common optical storage + systems.
1. PV power storage + charging pile
With the application of photovoltaic energy storage systems and the popularity of electric vehicles, the combination of the two has received extensive attention.
Working logic: PV is given priority to household loads. If there is any remaining, the car will be charged when connected to an electric vehicle, and the energy storage battery will be charged when it is not connected to the car. After it is fully charged, it can be sold to the power grid. If it is not allowed to sell electricity, it can also be set on the mobile app to not sell electricity. At night, the energy storage battery is discharged for home load use. During a power outage, photovoltaics and batteries only supply off-grid loads.
PV Carport
The public photovoltaic energy storage carport not only satisfies the properties of the carport for sheltering from wind and rain, but also improves the spontaneous self-use rate of photovoltaics. When there is no vehicle charging, the photovoltaic power generation is stored in the battery, and the battery is discharged to charge the electric vehicle when needed.
2. PV power storage+BIPV
The combination of optical storage system and BIPV can not only maintain the beauty and safety of the building, but also deeply integrate into green power.
3. PV power storage+ Community PV
The home solar storage system of the community project is given priority to self-use, the surplus electricity is shared (sold), and the insufficient part is taken from the DC bus. The system is uniformly dispatched by the EMS system.
4. PV power storage + country
The following case shows the optical storage solution designed for the bus terminal. The system includes photovoltaic modules, grid-connected inverters, AC-coupled inverters, batteries, EMS systems, etc., which can effectively reduce grid electricity consumption, sharpen the load, and ensure electricity safety.
The working logic is to supply daytime bus charging and office power for the photovoltaic system. The remaining part of the battery is charged, and the insufficient part is supplemented by the grid. Can support electric bus fast charging. At night, the battery is charged to the bus (slow charge), and the insufficient part of the grid is replenished. EMS uniformly monitors the status of charging piles, energy storage systems, and power grids, and uniformly adjusts the power consumption in combination with the bus travel schedule. In special cases, ATS switches to off-grid power supply to ensure the normal power supply of site control systems and safety facilities.
In addition to the above PV storage + system, there are also application scenarios such as PV storage + microgrid, PV storage + DC building, and PV storage + sunroom. PV storage + system may become a new growth point of domestic photovoltaics, let us wait and see.
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