SVPWM-based Z source NPC three-level inverter constant-power grid-connected control system

• Main Author: CHENG QIMING
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2017
• Subjects: 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; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention relates to an SVPWM-based Z source NPC three-level inverter constant-power grid-connected control system. The grid-connected control system comprises a Z source NPC three-level inverter and an LC filter which are connected in sequence, wherein the grid-connected control system also comprises a constant-power control module and an SVPWM control module which are connected in sequence; the input end of the constant-power control module is connected with the output end of the LC filter; the output end of the SVPWM control module is connected with the Z source NPC three-level inverter; the Z source NPC three-level inverter is powered by a direct current source; after the direct current source is filtered by the LC filter, the direct current source is connected to a power grid and the constant-power control module concurrently; and after the direct current source is processed by the constant-power control module, the processed direct current source is connected to the Z source NPC three-level inverter