Core converter for building bipolar DC microgrid and control method of core converter
A DC micro-grid, bipolar technology, applied in DC power input conversion to DC power output, control/regulation system, AC power input conversion to DC power output, etc., to simplify system construction, reduce equipment volume, facilitate The effect of system maintenance and expansion
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[0032] A converter provided by the invention is used to construct a bipolar DC microgrid, and serves as an interface converter between a high-voltage AC distribution network and a low-voltage bipolar DC microgrid. The rectification stage structure of the cascaded H bridge is adopted to match the high voltage of the AC distribution network; the high-frequency isolation stage with 3N three-port structure is used to realize the isolation of the power grid on both sides of the converter; the 3N three-port secondary structure of the isolation stage corresponds to The output phases are connected in parallel to realize the construction of the bipolar DC microgrid and the voltage and power matching of the bipolar DC microgrid. The present invention will be described in further detail below in conjunction with the accompanying drawings and specific methods.
[0033] figure 1 Shown is the three-phase topology of the converter proposed by this method, including: input filter 2 and conve...
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