Z-source inverter grid-connected control method based on single-cycle and dual-current loop control

The invention relates to a Z-source inverter grid-connected control method based on single-cycle and dual-current loop control. LCL is used for filtering grid-connected current. Dual loop control of agrid-connected current loop and a capacitor current loop is used to effectively suppress the resonan...

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Bibliographische Detailangaben
Hauptverfasser:	SUN KESHUAI, ZHANG YUNFEI, YIN CONGCONG, CHEN HAO, WU BIN, LIU YANG, YANG XUHONG
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 relates to a Z-source inverter grid-connected control method based on single-cycle and dual-current loop control. LCL is used for filtering grid-connected current. Dual loop control of agrid-connected current loop and a capacitor current loop is used to effectively suppress the resonance peak of an LCL-type filter and reduce the adverse effect of the resonance peak on a Z-source inverter grid-connected system. The grid-connected current outer loop adopts a PI controller. The capacitor current inner loop adopts a P controller. The stability of the system is improved, and the control precision of the system is improved. Single-cycle control is used to replace traditional PWM control to control a Z-source inverter switch, which can effectively suppress higher harmonics. The Z-source inverter grid-connected control scheme based on single-cycle control and dual-current loop control is provided to effectively suppress the influence of the resonance peak of the LCL-type filteron the stability of the sy