Impedance remodeling method and system for multi-port flexible interconnection device containing energy storage

• Main Authors: FENG XINZHEN, LU JUNFENG, ZHANG BO, XU YUNHAO, LING JIAKAI, LIU HUAN, WANG QIANYUN, MA JUN, HU ANPING, HUA MENGWEI, HU JINFENG, ZHANG MINYI, CHEN LIANG, LU YUPU, XU LINGSHUANG, WANG DESHUN, ZHU HONGBAO, LEI JIE, GONG XUNDONG
• Format: Patent
• Language: Chinese; English
• Published: 20.08.2024
• Subjects: CALCULATING; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; COMPUTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; GENERATION; PHYSICS; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention discloses an impedance remodeling method and system for a multi-port flexible interconnection device with energy storage, and the method is characterized in that the method comprises the following steps: 1, configuring energy storage equipment at the DC side of the multi-port flexible interconnection device, and monitoring the control parameters of a local monitoring system in the multi-port flexible interconnection device in real time; and step 2, comparing the control parameter with the active power of an output port of constant power control in the multi-port flexible interconnection device, and controlling the energy storage equipment to charge and discharge based on a comparison result. Constant voltage control is achieved through the energy storage device, the impedance characteristic of the interconnection transformer area is changed through the multi-port flexible interconnection device containing energy storage, harmonic impedance and frequency oscillation of the large-scale photovoltai