摘要
提出了一种模块组合多电平变换器(MMC)应用于并联有源滤波器(APF)的新控制策略。与H桥级联拓扑相比,MMC因具有正负直流母线,灵活性和适用性更广。为了消除谐波,本文在旋转坐标系解耦控制中的电流内环引入重复控制器。设计了MMC子模块电容电压的分级式均压控制策略,包括相间电压均衡控制策略和独立电容电压均衡控制,减小子模块电容电压的波动,维持直流电压稳定。引入比例谐振(PR)控制器,并基于负序二倍频坐标变换和相间解耦实现对环流的有效抑制。基于PSCAD/EMTDC的仿真结果表明了所提出的控制策略的有效性和可行性。
The paper presents a new control strategy of modular multilevel converter（MMC） for shunt active power filter application. Compared with the H bridge cascaded topology, MMC has common DC bus, which makes it more flexible and adaptive. In order to eliminate harmonic, this paper introduces the repetitive controller into the inner current loop decoupling control in the rotating coordinate system. MMC sub-module capacitor voltage classification balancing control strategy is proposed in this paper, including the phase to phase voltage balance control strategy and independent capacitor voltage balancing control, to reduce module capacitor voltage fluctuation and maintain DC voltage. The proportional resonant（PR） controller, and the negative sequence double frequency coordinate transformation and decoupling control is implemented to suppress the circulation. The effectiveness and feasibility of the proposed control strategy are verified by the simulation performed based on PACAD.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第12期52-59,共8页
Transactions of China Electrotechnical Society
基金
国家自然科学基金重点资助项目(51237002)
关键词
模块组合多电平变换器
有源滤波器
均压控制
环流抑制
谐振控制
Modular multilevel converter（MMC） active power filter（APF） balancing control circulation inhibition resonant control
