Premium
Performance improvement of repetitive controlled PWM inverters: A phase‐lead compensation solution
Author(s) -
Zhang Bin,
Zhou Keliang,
Wang Yigang,
Wang Danwei
Publication year - 2010
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.572
Subject(s) - control theory (sociology) , repetitive control , robustness (evolution) , pulse width modulation , compensation (psychology) , lag , phase distortion , total harmonic distortion , three phase , constant (computer programming) , computer science , voltage , engineering , control system , filter (signal processing) , control (management) , gene , psychology , computer network , biochemistry , chemistry , artificial intelligence , psychoanalysis , computer vision , electrical engineering , programming language
Abstract The compensation of the phase lag plays an important role in the improvement of convergence rate, tracking accuracy, and robustness of repetitive controller. However, it is often difficult to compensate the system phase lag exactly due to variation of the load and unknown disturbances. An alternative way is to provide a simple but effective phase compensation to compensate the phase lag in a frequency band that contains the major tracking error components. With this motivation, a repetitive control scheme with a linear phase‐lead compensator is proposed and applied to the control of constant‐voltage constant‐frequency pulse‐width modulated DC–AC inverters. Detailed analysis of phase compensation on system stability is provided, and conditions for the design of phase compensation are derived. The experimental results under different loads and load changes show that the proposed scheme can achieve high tracking accuracy, low total harmonic distortion, and fast dynamic response. Copyright © 2008 John Wiley & Sons, Ltd.