Multi-mode flexible switching coordination control system and method for alternating-current and direct-current interconnected micro-grid

The invention discloses an AC/DC interconnected micro-grid multi-mode flexible switching coordination control system and method, the system comprises an AC sub-micro-grid, a DC sub-micro-grid and an interconnection converter connected between the AC sub-micro-grid and the DC sub-micro-grid, the inte...

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Bibliographische Detailangaben
Hauptverfasser:	LIU JIULONG, ZHANG YAOYAO, LI YIZHE, PAN YUCHEN, PEI YINGXIAN, LI MOHAN, ZHU ZIHAO, ZHANG HAI, LIU ZHENGYI, LIU NING, LI ZHI, WU WEI, FENG CHUXIANG, WU HOUYI
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 discloses an AC/DC interconnected micro-grid multi-mode flexible switching coordination control system and method, the system comprises an AC sub-micro-grid, a DC sub-micro-grid and an interconnection converter connected between the AC sub-micro-grid and the DC sub-micro-grid, the interconnection converter is a bidirectional AC/DC converter, droop control is adopted during grid-connected/off-grid switching, and the DC sub-micro-grid is connected with the DC sub-micro-grid. And the power transmission quantity is adjusted and controlled according to the change of the bus voltage and frequency of the AC sub-microgrid and the DC sub-microgrid which are connected with the bidirectional AC/DC converter. When the AC/DC hybrid micro-grid is switched between the grid-connected mode and the island mode, the bidirectional AC/DC converter adopts droop control and adopts a pre-synchronization method to eliminate the difference between the AC/DC hybrid micro-grid and the public power grid, so that seamless sw