Control device of three-phase photovoltaic grid-connected inverter
A control device and inverter technology, which is applied in photovoltaic power generation, conversion of irreversible DC power input to AC power output, and single-grid parallel feeding arrangement, etc. problems such as high power consumption, to achieve the effect of simple structure, convenient implementation, and suppressing the DC component to zero
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[0020] refer to image 3 , the device for implementing the method of the present invention includes a three-phase grid-connected inverter main circuit 1 , a grid-connected control circuit 2 and a voltage DC component suppression circuit 3 .
[0021] Wherein the three-phase grid-connected inverter main circuit 1 includes a DC power supply 101, a three-phase inverter 102 and a power grid 103; the three-phase inverter 102 includes a DC energy storage capacitor C 1 , power tube S 1 , power tube S 2 , power tube S 3 , power tube S 4 , power tube S 5 , power tube S 6 , the output filter inductance L A , L B and L C ; The positive terminal of the DC power supply 101 and the DC energy storage capacitor C 1 The positive terminals of the DC power supply 101 and the DC energy storage capacitor C are connected together. 1 The negative terminals of the power tube S are connected together; 1 , S 3 , S 5 The collector is connected in parallel with the DC energy storage capacitor...
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