摘要
常规比例谐振控制器被广泛用于有源电力滤波器以及逆变器中,但是它在交流基波频率处增益无穷大,这将会引起稳定性问题。针对三相并网Z源逆变器的并网控制,提出一种新颖的模糊比例谐振控制策略,实现比例谐振控制器参数在线自整定,给出了控制系统的模型及实现过程。与常规比例谐振控制进行仿真比较,结果表明:模糊比例谐振控制策略具有稳定性好、动态响应快、稳态精度高、谐波抑制能力强的优点,证实了该策略的可行性和有效性。
Conventional proportional resonant （PR） controller is widely accepted and adopted in active power filters and inverters. But, the controller has an infinite gain at fundamental frequency, and the system stability is decreased. For improving the quality of current, a novel fuzzy PR control strategy for the Z-source inverter in three-phase grid-connected system was proposed. In the controller, fuzzy logic control was combined with PR control; the self-tuning of the fuzzy parameters was used in regulating the parameters of the PR controller. The system models and design procedure of the controller for Z-source inverter were also presented. Compared with conventional PR control strategy, the control strategy has more advantages such as its faster dynamic response, higher static tracking accuracy and better harmonic suppression. Simulation resuhs were provided to verify the feasibility and effectiveness of the proposed approach.
出处
《机床与液压》
北大核心
2017年第4期183-187,共5页
Machine Tool & Hydraulics
基金
2016年度江苏省高校自然科学研究面上项目(16KJB470019)
关键词
Z源逆变器
模糊控制
比例谐振控制
空间矢量脉宽调制
Z-source inverter
Fuzzy control
Proportional resonant （PR） control
Space vector pulse width modulation （ SVPWM ）
