基于内模控制器的MMC-HVDC稳态控制Steady State Control of MMC-HVDC System Based on Internal Model Controller
褚衍超;黄守道;孔凡蓬;廖武;
摘要(Abstract):
模块化多电平高压直流输电系统(modular multilevel converter-high voltage direct current,MMC-HVDC)通常采用基于比例积分(proportional integral,PI)的双闭环矢量控制,而PI调节存在响应速度慢、dq电流需要旋转解耦等问题。为此文章提出在两相静止坐标下基于内模控制的MMCHVDC稳态控制方案。首先分析了两相静止坐标下的MMCHVDC数学模型,然后结合内模控制的特性,对电流内环的控制结构和参数进行设计,并将内模内环与PI外环结合构造出双闭环控制结构。最后在Matlab/Simulink中搭建了MMC-HVDC系统模型,对多种工况进行仿真。仿真结果表明,所设计的控制器能够有效抑制母线电压波动,并能对负荷变化快速响应,提高了系统的鲁棒性。
关键词(KeyWords): 模块化多电平换流器;高压直流;内模控制;两相静止坐标系
基金项目(Foundation): 国家自然科学基金项目(51377050);; 国际科技合作项目(2011DFA62240)~~
作者(Author): 褚衍超;黄守道;孔凡蓬;廖武;
Email:
DOI: 10.13335/j.1000-3673.pst.2015.08.024
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