Frequency conversion circuit topology with MMC bridge arm and single-phase transformer connected in parallel

The invention provides a frequency conversion circuit topology with an MMC bridge arm and a single-phase transformer connected in parallel, and belongs to the technical field of flexible low-frequency converter stations, the frequency conversion circuit topology comprises an upper bridge arm and a l...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG ZHIPENG, LIU QINGXIN, NING XIAOLIANG, GUAN DAWEI, DONG BOWEN, KUANG YIFAN
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 CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	The invention provides a frequency conversion circuit topology with an MMC bridge arm and a single-phase transformer connected in parallel, and belongs to the technical field of flexible low-frequency converter stations, the frequency conversion circuit topology comprises an upper bridge arm and a lower bridge arm, the upper bridge arm and the lower bridge arm are connected in series, the power frequency side of the upper bridge arm is connected with a first power frequency transformer in parallel, and the first power frequency transformer is connected with a second power frequency transformer in parallel. The power frequency side of the lower bridge arm is connected with a second power frequency transformer in parallel, the polarity of valve side windings of the first power frequency transformer and the polarity of valve side windings of the second power frequency transformer are opposite, and the first power frequency transformer and the second power frequency transformer are connected in series. Compared w