Fully-controlled intelligent type electric energy quality correction apparatus and correction method applied to distribution network
A power quality and intelligent technology, applied in the direction of circuit devices, AC network circuits, harmonic reduction devices, etc., can solve the problems that the accuracy cannot meet the corresponding requirements, the flicker cannot be suppressed, and the cost is high, so as to reduce the control cost, Good effect of promoting use value and improving cost performance
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[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0028] Such as figure 1 As shown, a full-control intelligent power quality correction device applied to the distribution network includes an active part, a passive part, a controller and a transformer 1 .
[0029] The active part includes the static var generator SVG. The static var generator SVG adopts a three-phase four-wire three-level topology and is composed of IGBT modules. The center point, phase A, phase B, and phase C of the DC side of the SVG are respectively connected to the point N, phase A, phase B, and phase C of the three-phase grid 3;
[0030] The passive part includes a thyristor switching capacitor TSC and a capacitor adjustment and compensation device 2. The thyristor switching capacitor TSC adopts a three-phase co-compensation structure and is directly connected in parallel with the three-phase power grid 3 to compensate the reactiv...
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