Distributed photovoltaic power station user side three-phase imbalance counter-current prevention device and method
A distributed photovoltaic and reverse current prevention technology, which is applied in photovoltaic power generation, circuit devices, multi-phase network asymmetry reduction, etc., can solve the problems of reverse current back to the grid energy loss, the impact of system security and stable operation, etc., to avoid energy loss , Alleviate the power supply pressure of the power grid, and solve the effect of energy loss
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[0034] In order to make the working principle and technical solution of the present invention clearer and more intuitive, preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Apparently, the specific examples described are only used to explain the present invention, not to limit the present invention.
[0035] The example of the present invention provides a three-phase unbalanced backflow prevention device on the user side of a distributed photovoltaic power station. The overall structural block diagram of the system is as follows figure 1 As shown, since the load imbalance always exists, the controllable device and the energy storage system are combined on the load side to form an anti-backflow device. The device includes a three-phase rectification circuit connected in parallel with the user load side of the distributed photovoltaic power station, a bidirectional DC-DC conversion circuit, an energy st...
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