Study of Multi-level Rectifier in High Power System Based on a Novel Virtual Fluz Observer
In the control of PWM rectifier, it can restrain harmonic and interference effectively by constructing a virtual line-flux-linkage to serve as the oriented vector. However, there are some problems in the conventional method, such as the error of amplitude, the shift of phase angle and the nondeterminacy of initial oriented angle. In the thesis, two one-stage low-pass filters are adopted instead of the pure integrator in the virtual line-flux-linkage observer, which can steady the phase and amplitude. Furthermore, a novel method of voltage estimate at the three-level rectifier terminals is advanced based on the simplified SVPWM algorithm. The good dynamic and static performance under the proposed control strategy is verified by simulation and experiment.
Multi-level PWM rectifier voltage estimate virtual line-fluz-linkage observer
Hao Li Guojun Tan Jinghuan Fang Xuanqin Wu
School of Information and Electrical Engineering,China University of Mining and Technology,Xuzhou,221008,China
国际会议
武汉
英文
1-4
2009-05-17（万方平台首次上网日期，不代表论文的发表时间）