摘要
模块化多电平换流器(MMC)在柔性直流输电中存在网侧低次谐波,在较弱的电网或谐波污染较严重的条件下,谐波抑制策略显得尤为重要。该文分析了传统谐波补偿需要多个PI控制环节以及控制繁琐程度,提出了基于谐振补偿的谐波控制策略,电流内环采用比例谐振(PR)和谐振补偿控制策略,实现了对电流内环的无差跟踪和谐波补偿控制。推导了基于滑模控制直压外环新结构,提高了系统的鲁棒性。该控制方案基于静止坐标系,无需锁相环和坐标定向控制,简化了控制模型。在Matlab/Simulink中搭建了仿真模型,仿真结果也验证了所提策略的可行性。
According to grid current has larger low-order harmonics with modular multilevel converter based on HVDC（MMC-HVDC）,if grid is relatively weak or serious harmonics pollution under on condition,harmonic compensation control strategy especially important. What traditional harmonic compensation need more PI control links are analyzed with tedious of control. This paper puts forward harmonic control strategy based on proportional resonant（PR） control and harmonic compensation（HC） control,it realizes grid current no error following and harmonic compensation control strategy. By using derived power outer-loop control new structure basing on sliding mode control（SMC）,developing robustness of this system. That control algorithms based on the stationary frame simplify control without complex separating positive and rotating transition of coordinate. Simulation has verified that proposed control method correctly.
出处
《自动化与仪表》
2018年第2期73-76,81,共5页
Automation & Instrumentation
关键词
模块化多电平换流器
传统谐波抑制
比例谐振控制
谐波补偿控制
滑模控制
modular multilevel converter （MMC）
traditional harmonic compensation
proportional resonant （PR） control
harmonic compensation （HC） control
sliding mode control（SMC）
