电力系统自动化2025，Vol.49Issue(8)：30-39,10.DOI:10.7500/AEPS20231202001
超级电容储能型MMC多工况电磁暂态等值建模方法
Electromagnetic Transient Equivalent Modeling Method for Modular Multilevel Converter with Supercapacitor Energy Storage System Under Multiple Operation Conditions
摘要
Abstract
Modular multilevel converter(MMC)with supercapacitor energy storage system(SESS-MMC)combines the advantages of MMC and supercapacitor energy storage system,and can be used in the large-scale transmission of renewable energy.However,due to the more complex submodule(SM)structure of SESS-MMC and the more various operation modes,an equivalent model for SESS-MMC is proposed to increase the simulation efficiency under multiple types of transient and steady-state operation conditions,including steady-state,blocked start-up,DC fault blocking,etc.Firstly,the topology and operation modes of SMs in SESS-MMC are analyzed,and the adjoint circuits of a single SM are obtained by using the two-value resistance and the trapezoidal integral discretization method.Afterwards,the Thevenin equivalent process adapted to the solution logic of the EMTDC simulation platform is proposed to realize the equivalent simplification of SMs and bridge arms,and the overall equivalent circuit is obtained.In addition,the operation modes under blocked operation conditions are analyzed,and the equivalent blocked circuit is constructed and merged into the obtained overall equivalent model.Finally,the electromagnetic transient equivalent model for SESS-MMC is obtained under multiple operation conditions.It is verified by simulation in PSCAD/EMTDC that the proposed model has good simulation accuracy and efficiency.关键词
模块化多电平换流器/储能/电磁暂态等值模型/戴维南等值/闭锁/超级电容Key words
modular multilevel converter/energy storage/electromagnetic transient equivalent model/Thevenin equivalent/blocking/supercapacitor引用本文复制引用
付乐融,冯谟可,许建中..超级电容储能型MMC多工况电磁暂态等值建模方法[J].电力系统自动化,2025,49(8):30-39,10.基金项目
国家自然科学基金资助项目(52277094) （52277094）
中国南方电网有限责任公司科技项目(ZBKJXM20220069) （ZBKJXM20220069）
已申请国家发明专利(申请号:2023112066507). This work is supported by National Natural Science Foundation of China(No.52277094)and China Southern Power Grid Company Limited(No.ZBKJXM20220069). （申请号:2023112066507）
