Reactive compensation device and method for partially regulating voltages and capacitance of three-phase four-wire power grid
A three-phase four-wire system, compensation device technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation and other directions, can solve the problems of low load power factor, frequent load changes, large capacity of autotransformers, etc. The service life is consistent, the compensation accuracy is improved, and the effect of eliminating the inrush current
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[0026] A reactive power compensation device for partial voltage regulation and capacity regulation of a three-phase four-wire power grid, such as figure 1 As shown, it includes U-phase, V-phase and W-phase voltage regulation and capacity regulation reactive power compensation units and a control unit 6 . The reactive power compensation unit for each phase voltage regulation and capacity regulation is mainly composed of a current detection element 1, a voltage detection element 2, a full voltage compensation capacitor group 3, an auto-transformer 4 and a voltage regulation capacitor group 5.
[0027] The following takes the U-phase voltage regulation and capacity regulation reactive power compensation unit as an example to describe each phase voltage regulation and capacity regulation reactive power compensation unit in detail:
[0028] The U-phase current detection element 1 is connected in series with the live line of the U-phase of the power grid, the U-phase voltage detecti...
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