Harmonic self-compensation control method and system for direct-current charging pile

• Main Authors: LIN YAN, ZHANG ZHIGENG, ZHANG YAN, WANG LIANHUI, LAN JINCHEN, XU SHUANGTING, CHEN XIONG
• Format: Patent
• Language: Chinese; English
• Published: 27.02.2024
• 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; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention discloses a direct current charging pile harmonic self-compensation control method, which is applied to a Vienna type direct current charging pile, comprises a first module and a second module, each of which comprises one or more Vienna type topological rectification units, and comprises the following steps: controlling the first module to output reactive power; sampling the input current of the first module and extracting harmonic waves; generating a harmonic compensation reference voltage according to the harmonic generated by the first module; and controlling the second module to output harmonic waves which are equal in amplitude and opposite in phase with the harmonic waves generated by the first module according to the harmonic compensation reference voltage. According to the invention, through two electrically connected modules each comprising a Vienna type topology rectification unit, one module is controlled to output reactive power, and the other module is started to track and analyze h