模块化多电平换流器快速停机控制策略研究  

A fast shutdown control strategy based on modular multilevel converter

作　　者：魏萍[1] 王钦诚 李云丰[2] 

机构地区：[1]南昌大学信息工程学院,南昌330031 [2]华东交通大学电气与电子工程学院,南昌330031

出　　处：《电测与仪表》2015年第10期35-39,共5页Electrical Measurement & Instrumentation

基　　金：江西省研究生创新专项资金资助(YC2013-S059)

摘　　要：文中分析了MMC停机过程中需要采取的控制策略,在合理考虑冗余子模块的基础上使系统尽可能的将电容中的能量反馈至电网。重新推导了系统停机参数的选取,计算了快速停机策略下MMC系统的整体停机时间,有效的实现了放电电阻的选取。提出的新型停机策略能够在最大程度上更加合理的利用放电电阻,减小MMC系统的停机时间,从而有利于提高MMC系统运行经济性。最后,利用MATLAB仿真软件,搭建了MMC停机仿真模型,同时验证了提出的停机策略与以往文献相比具有更好的优越性。Firstly, this paper analyses the control strategies adopted by MMC in shutdown procedure and makes the energy saved in the capacitors feed back to grid as far as possible after considering the redundant sub-modules in each arm.Secondly, this paper deduces some formulas again to choose the system parameters and calculates the time of fast shutdown strategy to determine the the discharge resistance more reasonable.Therefore, a novel shutdown strategy with discharge resistance more reasonable as far as possible to reduce shutdown time and enhance economy of MMC system is put forward.Finally, a shutdown simulation model of MMC is constructed in MATLAB, which has more su-periority over other references published before.

关 键 词：模块化多电平换流器 柔性直流输电 定直流电压控制 停机策略 放电电阻 

分 类 号：TM93[电气工程—电力电子与电力传动]