Photovoltaic energy storage anti-backflow device
Photovoltaic energy storage anti-backflow device
The device comprises an anti-reflux controller, a photovoltaic inverter, a bidirectional inverter, an output contactor, an energy storage system, a monitoring computer, a local load unit and a power grid unit, wherein the photovoltaic inverter, the bidirectional inverter, the energy storage system and the monitoring computer are respectively connected with the anti-reflux controller through the RS485 Ethernet; the energy storage system is connected with the bidirectional inverter; the power grid unit is connected with the local load unit and then is respectively connected with the photovoltaic inverter and the bidirectional inverter after passing through the output contactor; and the output contactor is controlled to be closed and opened by the anti-reflux controller, and the anti-reflux control device also can be used for detecting the electric current of the local load unit, the electric current of the power grid unit and the voltage of the power grid unit.
5 FAQs about [Photovoltaic energy storage anti-backflow device]
Does a photovoltaic system have anti-backflow?
The photovoltaic system with CT (Current Transformer) has anti-backflow function, which means that the electricity generated by photovoltaics is only supplied to loads, preventing excess electricity from being sent to the grid. 2. Why do you need anti-backflow? There are several reasons for installing an anti-backflow prevention solution:
Why should I install an anti-backflow prevention solution?
There are several reasons for installing an anti-backflow prevention solution: 2.1.Limited by the capacity of the upper-level transformer, users have new grid system installation needs, but it is not allowed locally. 2.2.Due to some regional policies, grid connection is not allowed. Once it is found, the grid company will impose a fine.
How does a Deye inverter anti-backflow work?
4. The solution? Deye inverter anti-backflow working principle: install an meter with CT or current sensor at the grid-connected point. When it detects that there is current flowing to the grid, it will feed back to the inverter, and the inverter will immediately change its working mode and track from the maximum power point of MPPT.
How does a photovoltaic power system work?
In a power system, power is generally sent from the grid to the load, which is called forward current. After installing a photovoltaic power station, when the power of the pv system is greater than that of the load, the power that cannot be consumed will be sent to the grid.
What is countercurrent in a photovoltaic power station?
After installing a photovoltaic power station, when the power of the pv system is greater than that of the load, the power that cannot be consumed will be sent to the grid. Since the current direction is opposite to the conventional one, it is called “countercurrent". 1. What is anti-backflow?
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