Control method of low-voltage treatment device

• Main Authors: LIU WENJUN, ZHAN YANG, CHEN ZHONGWEI, CHEN YUANYANG, LENG YANG, CHEN JIAN, HE ZHIQIANG, LIU HAOTIAN, YAN HAO, WU YEFAN, DONG GUILING, QU SHAOQING
• Format: Patent
• Language: Chinese; English
• Published: 30.12.2022
• 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 discloses a control method of a low-voltage treatment device. The control method comprises the following steps: acquiring parameter data information of the low-voltage treatment device; when the power grid is normal, the inverter power supply part serves as a current source and is in a low-current grid-connected hot standby state; when the power grid is abnormal, the inverter power supply part serves as a voltage source, and a voltage-current double-closed-loop feedback control mode is adopted to supply power to a load; when the voltage of the power grid is low, a power loop feedforward control mode is adopted to control the grid-connected rectification part; and a proportional control mode and an integral control mode are adopted to control the photovoltaic and energy storage direct current conversion part. According to the method, the problem of low voltage can be precisely solved, the voltage and current quality of a grid-connected system can be improved, the dynamic response speed and the st