电力系统及其自动化学报2019，Vol.31Issue(6)：121-128,8.DOI:10.19635/j.cnki.csu-epsa.000069
可用于实际工程的MMC-HVDC输电系统等值模型
Equivalent Model of MMC-HVDC Transmission System for Real Projects
摘要
Abstract
The large number of arm sub-modules(SMs)in a modular multilevel converter high-voltage direct-current (MMC-HVDC)transmission system may bring tremendous computing workload to the simulation,resulting in slow sim?ulation speed and limited simulation scale. In this paper,the operating characteristics of arm SMs in different operating conditions of MMC-HVDC are analyzed;the equivalent models of arm SMs under three operating conditions are ex?pressed uniformly,and the improved equivalent model of MMC-HVDC that can simulate different operating conditions (e.g. the starting process,normal operation,and blocking state)is designed. With a 21-level detailed model and the equivalent model taken as examples,the simulation speed and accuracy of the proposed model,as well as the model’s performance under different working operating conditions,are tested;in addition,the simulation scale of the model is tested on a 501-level MMC-HVDC system. Results show that the established equivalent model has high accuracy and a large simulation scale,which can be effectively applied to simulate the MMC-HVDC system in real projects.关键词
模块化多电平电压源换流器高压直流输电/等值模型/启动环节/子模块闭锁/电磁暂态仿真Key words
modular multilevel converter based high-voltage direct-current transmission/equivalent model/starting pro⁃cess/sub-module block/electromagnetic transient simulation分类
信息技术与安全科学引用本文复制引用
胡伟,刘浴霜,李君,黄萌,陈堃,陈永洋..可用于实际工程的MMC-HVDC输电系统等值模型[J].电力系统及其自动化学报,2019,31(6):121-128,8.基金项目
国家电网公司科技资助项目(521532160015) （521532160015）
