基于桥臂等效电容的全桥子模块型MMC快速仿真方法  

A rapid simulation method for full-bridge sub-module MMC based on bridge arm equivalent capacitance

作　　者：陆翌 吴俊健 裘鹏 陈骞 黄晓明 许可涵 徐政[2] LU Yi;WU Junjian;QIU Peng;CHEN Qian;HUANG Xiaoming;XU Kehan;XU Zheng(State Grid Zhejiang Electric Power Co.,Ltd.Research Institute,Hangzhou 310014,China;College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]国网浙江省电力有限公司电力科学研究院,杭州310014 [2]浙江大学电气工程学院,杭州310027

出　　处：《浙江电力》2024年第3期47-54,共8页Zhejiang Electric Power

基　　金：国网浙江省电力有限公司科技项目(5211DS22000K);中央高校基本科研业务专项资金(2021QN4014)。

摘　　要：MMC(模块化多电平换流器)包含了大量的开关元件,给电磁暂态仿真带来了很大的计算负担。针对该问题,提出了一种基于桥臂等效电容的全桥子模块型MMC快速仿真方法。提出了正常工作、闭锁和全状态的桥臂等效电路建模方法,开发了一种精确仿真全桥MMC电磁暂态响应的仿真模型。在PSCAD/EMTDC平台搭建了两端MMC直流电网测试系统验证其可行性,同时将模型和戴维南等效模型进行对比,结果验证了所提全桥子模块型MMC快速仿真方法的精确性和快速性。MMC(modular multilevel converter) contains a large number of switching elements,which brings a huge computational burden to the electromagnetic transient simulation.For this problem,this paper proposes a rapid simulation method for full-bridge sub-module MMC based on bridge arm equivalent capacitance.A modeling method for arm equivalent circuit under normal working state,blocking state and full state was developed,and a simulation model was developed which can accurately simulate electromagnetic transient response of the full bridge MMC.On PSCAD/EMTDC platform,a two-terminal MMC-based DC grid test system was constructed to validate its feasibility.Additionally,the model was compared with the Thevenin equivalent model.The results confirm the accuracy and efficiency of the proposed simulation.

关 键 词：直流电网 模块化多电平换流器 桥臂等效 电磁暂态 

分 类 号：TM46[电气工程—电器]