MMC sub-module capacitance value selecting method

The invention discloses an MMC sub-module capacitance value selecting method. The concept of an equal volume discharge time constant is introduced, and a relationship between the constant and an MMC sub-module capacitance value is established. Through simulation, the given range of the equal volume...

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Bibliographische Detailangaben
Hauptverfasser:	LIU GAOREN, XIAO HUANGQING, ZHANG ZHEREN, WANG SHIJIA, XU ZHENG
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:	The invention discloses an MMC sub-module capacitance value selecting method. The concept of an equal volume discharge time constant is introduced, and a relationship between the constant and an MMC sub-module capacitance value is established. Through simulation, the given range of the equal volume discharge time constant is determined. According to an actual engineering requirement, the given value of the equal volume discharge time constant is selected within the given range. According to the given value, the MMC sub-module capacitance value is calculated and determined based on the relationship between the equal volume discharge time constant and the MMC sub-module capacitance value. According to the invention, the selected sub-module capacitance value is highly economic and versatile; the total investment cost can be reduced to some extent; and the method is applicable to MMC systems of different volumes and different voltage levels.