Three-level inverter circuit
A three-level inverter and circuit technology, applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve the problems of switching capacitor voltage rise, unfavorable output power quality, multi-element devices, etc., to achieve leakage current elimination and voltage stability , Improving the effect of reactive power compensation ability
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[0020] The present invention will be described in detail below with reference to the accompanying drawings and embodiments of the present invention.
[0021] see attached figure 1 , a three-level inverter circuit of the present invention includes: a photovoltaic DC power supply U pv , the first capacitor C 1 , the second capacitor C 2 , the first power switch tube S 1 , back-to-back second power switch tube S 2 , bidirectional third power switch tube S 3 , the fourth power switch tube S 4 , AC filter inductor L 1 and single-phase AC distribution network u g .
[0022] The three-level inverter circuit, photovoltaic DC power supply U pv The positive pole of the first capacitor C 1 The positive pole, the first power switch tube S 1 The drain and bidirectional third power switch tube S 3 The collector is connected; the first power switch tube S 1 The source and back-to-back second power switch tube S 2 One end of the source, the second capacitor C 2 The negative pol...
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