Micro-grid inverter control method and system, storage medium and computing equipment

• Main Authors: QU HUIXING, XU ZHIYING, SHAN XIN, DING RAN, WANG RUOYANG, ZHOU ZIQI, QIAN SHUANG, ZHANG PING, WANG PENG, FENG WEI, GUO LIANG, KONG XIANGMEI, XU HAIXIANG, WANG JINGRAN, ZHUANG SHENGLUN, SUN SUJUAN
• Format: Patent
• Language: Chinese; English
• Published: 08.10.2021
• 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 micro-grid inverter control method. The method comprises the following steps: sampling capacitor voltage, power grid phase voltage, injection load current and injection power grid current; inputting the sampled capacitor voltage, the sampled power grid phase voltage, the sampled injected load current and the sampled injected power grid current into a pre-designed new single-loop control model, and performing microgrid inverter control; and according to the new single-loop control model, on the basis of a traditional single-loop control model, feeding modulation voltage of a previous sampling period back to a control loop according to a feedback proportionality coefficient. Meanwhile, the invention discloses a corresponding system. According to the invention, the modulation voltage of the previous sampling period is fed back to the control loop according to the feedback proportionality coefficient, so that the critical frequency is shifted, and the robustness of the resonant frequency