Three-phase four-wire uninterrupted power supply device with function of active filter
A three-phase four-wire, source filter technology, applied in the direction of circuit devices, harmonic reduction devices, battery circuit devices, etc., can solve the problem of inability to eliminate power grids, pollution, reactive components, harmonic components and unbalanced component compensation and other issues to achieve the effect of eliminating pollution
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[0010] Specific implementation mode one: the following combination figure 1 Describe the present embodiment, the three-phase four-wire uninterruptible power supply device with active filter function described in the present embodiment, it includes grid 101, user's electric load 102, storage battery pack 103, DC stabilized voltage circuit 104, three-phase Four-wire inverter 105, digital signal processing control unit 106, circuit breaker 108, first detector 107 and second detector 109, the DC voltage output terminal of battery pack 103 is in phase with the DC voltage input terminal of DC voltage stabilizing circuit 104 connection, the DC voltage output terminal of the DC voltage stabilizing circuit 104 is connected to the DC voltage input terminal of the three-phase four-wire inverter 105, and the three-phase voltage output terminal of the AC side of the three-phase four-wire inverter 105 passes through the circuit breaker 108 Connected to the power grid 101, the DC power conversi
Example Embodiment
[0011] Specific implementation mode two: the following combination figure 2 This embodiment will be described. This embodiment will further describe the first embodiment. The three-phase four-wire inverter 105 includes a DC side capacitor 201, a four-leg voltage source converter 202, a drive circuit 203, and an LC-type filter output circuit. 206, the LC-type filter output circuit 206 includes four filter output circuit inductors 204 and four filter output circuit capacitors 205, and the four bridge arms of the four-arm voltage source converter 202 are composed of four pairs of fully-controlled power devices IGBT, The emitter of the first fully-controlled power device IGBT of each bridge arm is connected to the collector of the second fully-controlled power device IGBT and one end of a filter output circuit inductor 204 at the same time, and the other end of each filter output circuit inductor 204 One end is respectively connected to one end of a filter output circuit capacitor 2
Example Embodiment
[0012] Specific implementation mode three: the following combination figure 2 Describe this implementation mode, this implementation mode will further explain the second implementation mode, among the four groups of driving signals of the driving circuit 203, each group of driving signals has two driving signals, which are respectively connected with two full-control type driving signals forming a bridge arm The base of the power device IGBT is connected.
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