Grid-connected inverter grid-side current control method

The invention discloses a grid-connected inverter grid-side current control method. According to an equivalent topological graph of an LCL type inverter, a controlled source (alphavpcc-igZv) is connected in series in a filter inductor L1 branch and a filter capacitor Cf branch, igZv simulates dampin...

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Bibliographische Detailangaben
Hauptverfasser:	HE YUANBIN, YANG XIAOLEI, ZHOU ZHENGYANG, SHI BOLONG, DING LEIMING, NI QIULONG, GUO LEI, HANG LIJUN, YIN WEIBIN, FANG JIANGXIAO, HAN QIGUO, TAO HUAN, YE LIN, BIAN ZHIWEI
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 grid-connected inverter grid-side current control method. According to an equivalent topological graph of an LCL type inverter, a controlled source (alphavpcc-igZv) is connected in series in a filter inductor L1 branch and a filter capacitor Cf branch, igZv simulates damping Zv to suppress resonance peak of the inverter, and a controlled voltage source alphavpcc can resist influence of power grid harmonic voltage on grid-connected current. The controlled source connected in series with the inductor L1 branch can be integrated into inverter control, and the controlled source connected in series with the capacitor Cf branch needs to be realized through an external active compensation device. The output impedance transfer function of the inverter can be derived according to the overall control block diagram of the inverter, and parameter design is carried out based on the passive theory. Therefore, the passive range of the inverter is widened, the output impedance intensity of the inver