Method for controlling voltage output of hybrid H-bridge cascaded inverter
A cascading inverter, voltage output technology, applied in output power conversion devices, electrical components, single-grid parallel feeding arrangements, etc., can solve problems such as increasing switching loss, reducing efficiency, and increasing the number of power switches. Achieve the effect of improving conversion efficiency and reducing the number of power switches
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[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0032] The method of the present invention is based on "the grid-connected controller 4 controls the switching states of the power switches Sa1-4 of the H-bridge inverter 1, so that the AC side of each H-bridge inverter unit 11 outputs 1, -1 and 0 three different voltages, so as to control the working state of the H-bridge inverter 1", so that the H-bridge inverter 1 can output more kinds of voltages, so that the voltage output by the AC side of the H-bridge inverter 1 changes with time The waveform is better close to the ideal sine wave waveform, which meets the requirements of grid connection. The inventive method comprises the following steps:
[0033] 1) if figure 2 , image 3 As shown, an H-bridge inverter 1 with a DC voltage source of 3 voltage levels is set: the structure of the H-bridge inverter 1 is the same as the existing structure, the...
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