MMC DC side fault current control method based on DC voltage fuzzy control

The invention discloses an MMC DC side fault current control method based on DC voltage fuzzy control, and belongs to the technical field of DC power transmission. The method comprises the steps: mapping the power deviation of the MMC DC power and an MMC AC active power target value to a controller...

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Bibliographische Detailangaben
Hauptverfasser:	LI SHUFENG, SONG YACHAO, KANG CHENG, WANG JUNCHAO, HAO BAOXING, LI KUN, ZHANG XIAOYU, WANG JIEQING
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 MMC DC side fault current control method based on DC voltage fuzzy control, and belongs to the technical field of DC power transmission. The method comprises the steps: mapping the power deviation of the MMC DC power and an MMC AC active power target value to a controller through a feedback function based on an existing MMC control strategy, so as to adjust DC voltage target values of an MMC DC bus and a power module to realize the control of the MMC DC side fault current without affecting the MMC AC active power transmission. Specifically, the method reduces the DCvoltage target values of the MMC DC bus and the power module during the MMC DC side fault, and reduces the capacitor discharge speed of the MMC power module, thereby suppressing the rising speed of the MMC DC side fault current; after the MMC DC side fault is removed, the method increases the DC voltage target values of the MMC DC bus and the power module, increases the capacitance charging speedof the MMC power module, a