基于LCL谐振变换器的蓄电池分组式在线核容技术OA

According to the issues of insufficient efficiency and easy spread of faults during the battery capacity verification process in substations,it develops a set of group parallel architecture,integrating the LCL series resonant bidirectional energy conversion method,which features an online intelligent capacity verification function.Among the 108 cell,2 V series-connected batteries,it reorganizes 102 cells from a eight 12 V independent modules,which are then connected in parallel to the DC bus via an LCL resonant converter.These modules feature charge and discharge management and rapid fault removal capabilities,and are embedded with a dynamic capacity model and parallel kernel capacity algorithm through an edge computing terminal.Verification at the 110 kV substation shows that the parallel capacity verification time of the dual modules reduces from 20 hours to 1.97 hours,a decrease of 91%.The success rate of fault isolation reaches 100%.The annual operation and maintenance cost reduces from CN ￥ 440,000 to CN￥ 233,000,a decrease of 47%.The automatic generation accuracy of the capacity report is 100%.The combination of group structures and LCL resonant soft-switching technology promotes the evolution of battery operation and maintenance towards a fully automatic intelligent mode.