DVR (Dynamic Voltage Restorers)-based low-voltage ride through support device of wind generating set
A technology for wind turbines and low-voltage ride-through, applied in wind power generation, reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve problems that have not been reported and applied, and achieve improved service life and low cost , high reliability effect
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[0042] Depend on figure 1 It can be seen that a three-phase independent H-bridge inverter unit is provided between the A port and the B port of the dynamic voltage restorer DVR, and each independent H-bridge inverter unit is provided with a filter and an H-bridge inverter. Filter LB per phase A , LB B , LB C The input side is set between the A port and the B port of the DVR in series, one end is connected to the corresponding output end of the wind turbine, and the other end is connected to the corresponding power grid by the B port of the DVR, and enters the corresponding phases after filtering. H-Bridge Inverter UI A 、UI B and UI C AC input side. Three H-Bridge Inverter UI A 、UI B and UI C The output side of the DVR is connected in parallel to form the C port of the DVR, and the C port is equipped with a DC capacitor C 1 . The dynamic voltage restorer DVR with this structure can realize synchronous compensation for the output terminal voltage of the wind power gen...
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