Open AccessSliding mode control of permanent magnet generator system based on improved exponential rate reaching law
Author(s) -
Huang Jian,
Zhang Zhuoran,
Han Jianbin,
Jiang Wenying
Publication year - 2020
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
ISSN - 1751-8679
DOI - 10.1049/iet-epa.2019.0749
Subject(s) - control theory (sociology) , law , sliding mode control , transient (computer programming) , voltage , steady state (chemistry) , exponential function , transient response , exponential stability , tracking error , engineering , computer science , mathematics , physics , control (management) , nonlinear system , mathematical analysis , quantum mechanics , political science , electrical engineering , operating system , chemistry , artificial intelligence
This study focuses on the improvement in the transient performance of DC‐link voltage for a permanent magnet generator (PMG) system. Based on the vector control theory and double closed‐loop control, the sliding mode control (SMC) method with the improved exponential rate reaching law (IERRL) is proposed in the voltage loop of the PMG system. The switching surface is designed with an integral term of state variable to suppress chattering and increase response speed. In addition, the IERRL that combines the concept of constant‐proportional rate reaching law and exponential reaching law is proposed to further suppress chattering and eliminate steady‐state tracking error of DC‐link voltage. A detailed analysis of control law, system stability, reaching time, and chattering on switching surfaces are presented as well. The SMC method with IERRL improves the transient performance under sudden load changing occasion and eliminates the steady‐state tracking error of DC‐link voltage. Simulation and experimental results verify the effectiveness of the proposed method.