控制理论与应用2023，Vol.40Issue(11)：1920-1930,11.DOI:10.7641/CTA.2022.20367
基于自适应滑模观测器的高铁牵引系统单相三电平整流器开路故障诊断
Open-circuit fault diagnosis of single-phase three-level rectifier in high-speed train traction system based on adaptive sliding mode observer
摘要
Abstract
In order to improve the stability and reliability of high-speed train traction system,an open-circuit fault diagnosis method for single-phase three-level rectifier based on the adaptive sliding mode observer is proposed in this paper.Firstly,the state space model of single-phase three-level rectifier under open-circuit fault condition is established,then an adaptive sliding mode observer with fast convergence speed and significant suppression of high-frequency chattering is designed to accurately estimate the grid-side current.Subsequently based on the gird-side current of the rectifier and the output current of the observer,an open-circuit fault detection method based on the root mean square of the absolute value of the current is proposed.On this basis,the current residual is used to construct the initial fault location to locate the power switches.Finally,an adaptive sliding mode observer based on the open-circuit fault switching function is used to locate the fault switch accurately.The method proposed in this paper can realize the fault detection and location of all power switches of single-phase three-level rectifier,with fast diagnosis speed,strong robustness and no additional hardware circuit.The accuracy and robustness of the proposed diagnosis method are verified by experiments.关键词
单相三电平整流器/高速列车牵引系统/开路故障/滑模观测器/自适应阈值Key words
single-phase three-level rectifier/high-speed train traction system/open-circuit fault/sliding mode observ-er/adaptive threshold引用本文复制引用
许水清,王健,胡友强,张可,江萍,柴毅..基于自适应滑模观测器的高铁牵引系统单相三电平整流器开路故障诊断[J].控制理论与应用,2023,40(11):1920-1930,11.基金项目
国家自然科学基金项目(62273128),国家自然科学基金项目(61803140),国家自然科学基金重点项目(U2034209)资助.Supported by the National Natural Science Foundation of China(62273128),the National Natural Science Foundation of China(61803140)and the National Key Natural Science Foundation of China(U2034209). （62273128）
