A large-capacity unified power quality controller and its control method
A technology of power quality and control method, which is applied in the direction of electrical components, circuit devices, AC network circuits, etc., and can solve problems such as difficult control
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[0070] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0071] The present invention provides a large-capacity unified power quality controller UPQC, the schematic diagram of which is as follows image 3 As shown, the unified power quality controller adopts a three-phase three-wire parallel-series structure, including parallel-connected voltage source converters and series-connected voltage source converters connected through a common DC bus; parallel-connected voltage source converters use multi-winding The single-phase transformer is connected to the single-phase H-bridge converter structure, the primary side of the multi-winding single-phase transformer is connected to the AC side power grid through a shunt reactor, and the secondary side of the multi-winding single-phase transformer is connected to the AC side of the H-bridge converter; the series connection Type voltage ...
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