Method, device and equipment for calculating output current of photovoltaic power generation system and medium

• Main Authors: XU SHOUDONG, PENG JUNZHEN, CHEN YONG, XU JIYONG, LI SHIWEI, LI JIE, HE XIN, ZHANG YUANLONG, SHI HENGCHU, GONG HUI, GAO JIA, LONG ZHIHUA, BI SHUQI, YOU HAO, XING CHAO, KONG DEZHI, ZHANG LI, OUYANG JINXIN, XI XINZE, TAO RUI, DING ZHENGHONG
• Format: Patent
• Language: Chinese; English
• Published: 25.07.2023
• 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; GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-REDRADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, E.G. USINGPHOTOVOLTAIC [PV] MODULES; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; SYSTEMS FOR STORING ELECTRIC ENERGY; TESTING

The invention discloses a photovoltaic power generation system output current calculation method, device and equipment and a medium, and the method comprises the steps: calculating a voltage amplitude and a voltage phase angle jump variable of an access point of a photovoltaic power generation system after a fault based on a fault position of a power grid, parameters of the photovoltaic power generation system and parameters of the power grid; calculating the phase-locked deviation between the output phase angle of the phase-locked loop and the voltage phase angle of the access point; calculating a current control reference value after the fault; calculating the three-phase output current of the photovoltaic power generation system according to the obtained data; and decomposing each phase of output current to obtain a current component. According to the method, the influence of short-time asynchronization of a phase-locked loop and a power grid phase angle caused by voltage phase angle jump on the output sho