Direct-current converter high-frequency impedance modeling method

The invention discloses a direct-current converter high-frequency impedance modeling method. The method comprises the steps of determining various harmonic paths in a DC/DC converter and a modular multilevel converter, wherein the DC/DC converter and the modular multilevel converter belong to a dire...

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Bibliographische Detailangaben
Hauptverfasser:	ZHU ZHENGXUAN, FENG TAO, CHEN JINFENG, JIA KE, BI TIANSHU, ZHAO GUANKUN, ZHAO QIJUAN
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 a direct-current converter high-frequency impedance modeling method. The method comprises the steps of determining various harmonic paths in a DC/DC converter and a modular multilevel converter, wherein the DC/DC converter and the modular multilevel converter belong to a direct current converter; carrying out equivalence and simplification on high-frequency harmonic paths in the DC/DC converter and the modular multilevel converter according to an actual impedance parameter to obtain a constant high-frequency harmonic path; and based on the constant high-frequency harmonic path, calculating a high-frequency impedance model of each DC/DC converter and the modular multilevel converter. By using the method, on the basis of analyzing the DC/DC converter and an MMC harmonic path, reasonable equivalence and simplification are performed according to an element parameter characteristic, and a high-frequency impedance model of the converter is established. The model is not influenced by a conver