可仿真任意工况的MMC等值电磁暂态仿真模型与平均值模型  

Equivalent Electromagnetic Model and Averaged Value Model of MMC for Operating Condition Simulation

作　　者：蒋霖[1] 周诗嘉[2] 李子寿[1] 向往[2] 胡济洲[1] 程杰 文劲宇[2] 

机构地区：[1]国网湖北省电力公司,武汉430077 [2]强电磁工程与新技术国家重点实验室(华中科技大学电气与电子工程学院),武汉430074 [3]湖北省电力勘测设计院,武汉430040

出　　处：《南方电网技术》2016年第2期10-17,共8页Southern Power System Technology

摘　　要：基于对MMC在启动以及直流故障期间桥臂电容电压动态过程的分析,提出了改进的MMC等值电磁暂态仿真模型,并根据桥臂总电容电压的动态特性提出了可仿真任意工况的MMC平均值模型。在PSCAD/EMTDC下搭建了21电平MMC的详细电磁暂态仿真模型、等值电磁暂态模型和平均值模型,通过启动、电流阶跃、交流故障和直流故障、环流抑制器投切仿真,验证了所提出的等值电磁暂态仿真模型和平均值模型可以分别在换流站级和电力系统级的研究上取代详细开关模型并提高仿真速度。Based on analysis of the dynamic process of the arm capacitors during start-up and DC fault of a MMC,an improved equiv-alent electro-magnetic simulation model of MMC is proposed in this paper,and according to the dynamic characteristics of the total ca-pacitor voltage of an arm,an averaged value model of MMC for its operating condition simulaton is proposed. Then detailed switc-hing,equivalent and averaged value electro-magnetic models of a 21-level MMC are built on PSCAD/EMTDC. By taking simulations during start-up,current step,AC fault and DC fault,the proposd equivalent model and average value model are proved to be suitable to replace the detailed simulation model of MMC in the converter-level study and power system level study with significantly increased simulation speed.

关 键 词：电压源型换流器 模块化多电平换流器 电磁暂态仿真 等值模型 平均值模型 

分 类 号：TM743[电气工程—电力系统及自动化]