摘要
有源中点钳位型五电平逆变器已逐步运用到大功率光伏并网系统中。为解决飞跨电容电压与中点电位存在耦合这一问题,该文在载波移相调制策略的基础上,对飞跨电容电压与中点电位之间的关系进行详尽的数学推导,进而提出一种分裂调制波的解耦控制方案。同时,为避免飞跨电容的控制对输出电流的基波造成影响,在上述方案的基础上提出一种约束条件,实现对解耦控制的优化,并给出详细的算法流程。仿真和实验验证优化解耦控制算法的可行性及控制性能。
Active neutral-point-clamped five-level(ANPC-5 L) inverter has been gradually applied to the high-power photovoltaic grid-tied system. In order to solve the coupling problem between the flying capacitor voltages and neutral-point potential, a detailed mathematical derivation of the relationship between the flying capacitor voltages and neutral-point potential was carried out based on the carrier phase-shifted modulation strategy. Then a decoupling control using modulation wave splitting was proposed. Meanwhile, in order to avoid the effect of flying capacitor voltage control on the output current fundamental wave, this paper introduced a constraint condition based on the above scheme to achieve optimized control, and a detailed algorithm flow chart was given. The simulation and experiment results prove the feasibility and performance of this algorithm.
作者
王付胜
窦盛
付航
郑德佑
杜成孝
刘芳
WANG Fusheng;DOU Sheng;FU Hang;ZHENG Deyou;Do Thanh Hieu;LIU Fang(School of Electric Engineering and Automation,Hefei University of Technology,Hefei 230009,Anhui Province,China;School of Electrical and Electronic Engineering,Hung Yen University of Technology and Education,Hung Yen 160000,Vietnam)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2019年第4期1150-1162,共13页
Proceedings of the CSEE
基金
国家863高技术研究发展计划项目(2015AA050607)~~
关键词
飞跨电容电压
解耦控制
分裂调制波
中点波动
电流畸变
flying capacitor voltage
decoupling control
modulation wave splitting
fluctuation of neutral-point potential
current distortion
