Three-level inversion unit and photovoltaic inverter

The utility model provides a three-level inversion unit and a photovoltaic inverter. The three-level inversion unit comprises a first switch module which is arranged between a first end of a direct-current side and a first alternating-current output end; a second switch module which is arranged betw...

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Bibliographische Detailangaben
Hauptverfasser:	WANG PENGFEI, GUO LONGLONG, LIU JIE, LIANG JINGZHE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERATION REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
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Beschreibung
Zusammenfassung:	The utility model provides a three-level inversion unit and a photovoltaic inverter. The three-level inversion unit comprises a first switch module which is arranged between a first end of a direct-current side and a first alternating-current output end; a second switch module which is arranged between a second end of the direct-current side and the first alternating-current output end; and a freewheeling module which is arranged between the first alternating-current output end and a second alternating-current output end, and includes a third switch module and a plurality of freewheeling diodes, wherein, among the plurality of freewheeling diodes, the anode of a fifth diode and the anode of a seventh diode are connected at a second node, the cathode of a fourth diode and a cathode of a sixth diode are connected at a first node, the anode of the fourth diode and the cathode of the fifth diode are connected at the second alternating-current output end, the anode of the sixth diode and the cathode of the seventh