INTELLIGENT LEVEL TRANSITION SYSTEMS AND METHODS FOR TRANSFORMERLESS UNINTERRUPTIBLE POWER SUPPLY

INTELLIGENT LEVEL TRANSITION SYSTEMS AND METHODS FOR TRANSFORMERLESS UNINTERRUPTIBLE POWER SUPPLY

PROBLEM TO BE SOLVED: To provide intelligent level transition systems and methods for a transformerless uninterruptible power supply.SOLUTION: Systems and methods are provided for controlling an uninterruptible power supply (UPS) to transit between three- or higher-level operation and two-level oper...

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Bibliographische Detailangaben
Hauptverfasser: KOLHATKAR YASHOMANI Y, PIEMONTESI MARCO, SILVIO COLOMBI, PRASAD LAKSHMI, STROZZI LAURO
Format: Patent
Sprache: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
GENERATION
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide intelligent level transition systems and methods for a transformerless uninterruptible power supply.SOLUTION: Systems and methods are provided for controlling an uninterruptible power supply (UPS) to transit between three- or higher-level operation and two-level operation in a neutral-point-clamped (NPC) inverter. In an example, a UPS system includes an NPC inverter and a controller. The NPC inverter may supply power to a load. The controller may control the inverter to operate in a three- or higher-level mode when the load is substantially balanced and to operate in a two-level mode when the load is substantially unbalanced.