Grid-side power factor control method for two-stage matrix converter based on quasi-PR control
A power factor control, matrix converter technology, applied in the direction of AC power input to AC power output, output power conversion device, high-efficiency power electronic conversion, etc., can solve problems such as grid-side current phase shift and reduce system calculation Quantitative, closed-loop control structure is simple, and the effect of strong robustness
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[0022] Below in conjunction with accompanying drawing, the present invention will be further described:
[0023] The two-stage matrix converter topology is as figure 1 As shown, the switching main circuit is divided into two stages: rectification stage and inverter stage. The rectification stage is a current source rectifier composed of six bidirectional switches, and the inverter stage is a traditional three-phase two-level voltage source inverter. Coupled together through the virtual DC side, so the rectifier stage can adopt zero-current commutation mode to reduce switching loss.
[0024] In order to solve the problem that the existing grid-side unit power factor control method needs to calculate the corresponding parameters off-line and has poor robustness, the present invention proposes the following figure 2 The grid-side power factor control method of the dual-stage matrix converter based on quasi-PR control is shown. Different from the existing grid-side power facto...
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