An adaptive stable observer for on board auxiliary inverters with online current identification strategy  

作　　者：LI Wei LIU You-mei CHEN Te-fang DENG Jiang-ming 李蔚;刘友梅;陈特放;邓江明

机构地区：[1]School of Information Science and Engineering, Central South University, Changsha 410083, China [2]Zhuzhou Electric Locomotive Limited Company, CRRC, Zhuzhou 412001, China [3]School of Traffic Transportation Engineering, Central South University, Changsha 410075, China

出　　处：《Journal of Central South University》2017年第4期819-828,共10页中南大学学报（英文版）

基　　金：Project(61273158)supported by the National Natural Science Foundation of China

摘　　要：An adaptive stable observer with output current online identification strategy for the auxiliary inverters applied in advanced electric trains, such as high speed railway, urban rail, subway and maglev trains, is proposed. The designed observer is used to estimate the state variables, i.e. controllable duty ratio and current components in d-q-o rotary reference frame. The convergence of the observer estimation error is analyzed with consideration of uncertain level variation of input voltage at direct current(DC) side and sufficient conditions are given to prove its practical stability. Experimental results are shown to confirm the effectiveness of the proposed observer.An adaptive stable observer with output current online identification strategy for the auxiliary inverters applied in advanced electric trains, such as high speed railway, urban rail, subway and maglev trains, is proposed. The designed observer is used to estimate the state variables, i.e. controllable duty ratio and current components in d-q-o rotary reference frame. The convergence of the observer estimation error is analyzed with consideration of uncertain level variation of input voltage at direct current(DC) side and sufficient conditions are given to prove its practical stability. Experimental results are shown to confirm the effectiveness of the proposed observer.

关 键 词：AUXILIARY INVERTER ADAPTIVE OBSERVER online identification LYAPUNOV function parameter variation 

分 类 号：TM464[电气工程—电器]