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 principles and technical solutions of the present invention clearer and more intuitive, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the specific examples described are only used to explain the present invention and do not limit the present invention.
[0035] An 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 structure of the system is as follows figure 1 As shown, since load imbalance always exists, the controllable device and the energy storage system are combined to form an anti-backflow device on the load side. The device includes a three-phase rectifier circuit, a two-way DC-DC conversion circuit, an energy storage battery and a microprocessor connected in parallel with the user load side of the distributed photovoltaic power ...
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