Asynchronous power grid interconnection three-phase imbalance treatment method based on intelligent soft switch

• Main Authors: HUANG HONGXU, LIANG RUI, ZHANG PENG, WANG CHEN, ZHANG XIAOTONG, ZHANG GE, CHEN YUJING, XU QING, WANG YENING, KONG LINGCHANG, PENG NAN
• Format: Patent
• Language: Chinese; English
• Published: 02.11.2021
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention relates to an asynchronous power grid interconnection three-phase imbalance treatment method and device based on an intelligent soft switch. The method comprises the following steps: firstly, acquiring three-phase voltage and current signals of asynchronous interconnected power distribution networks on two sides of a soft switch, decoupling positive and negative sequence voltage and current components with the frequency of omega, and calculating the three-phase unbalance degrees of the power distribution networks on two sides of the soft switch; and then, comparing the three-phase unbalance degrees of the power distribution networks on the two sides, taking the power distribution network with the lower three-phase unbalance degree as a power transmitting end, and transmitting power to the side with the higher three-phase unbalance degree; and finally, according to the three-phase unbalance degrees obtained in real time, changing an SOP control strategy, and repeating the above steps until the th