高电压技术2007，Vol.33Issue(11)：88-93,6.
Novel Fault Diagnosis Scheme for HVDC System via ESO
Novel Fault Diagnosis Scheme for HVDC System via ESO
摘要
Abstract
A novel fault detection and identification (FDI) scheme for HVDC (High Voltage Direct Current Transmission) system was presented. It was based on the unique active disturbance rejection concept, where the HVDC system faults were estimated using an extended states observer (ESO). Firstly, the mathematical model of HVDC system was constructed, where the system states and disturbance were treated as an extended state. An augment HVDC system was established by using the extended state in rectify side and converter side, respectively. Then, a fault diagnosis filter was established to diagnose the HVDC system faults via the ESO theory. The evolution of the extended state in the augment HVDC system can reflect the actual system faults and disturbances, which can be used for the fault diagnosis purpose. A novel feature of this approach is that it can simultaneously detect and identify the shape and magnitude of the HVDC faults and disturbance. Finally, different kinds of HVDC faults were simulated to illustrate the feasibility and effectiveness of the proposed ESO based FDI approach. Compared with the neural network based or support vector machine based FDI approach, the ESO based FDI scheme can reduce the fault detection time dramatically and track the actual system fault accurately. What's more important, it needs not do complex online calculations and the training of neural network so that it can be applied into practice.关键词
fault detection and identification / HVDC/ active disturbance rejection / extended states observer/ fault diagnosis filter/ neural network/ support vector machineKey words
fault detection and identification / HVDC/ active disturbance rejection / extended states observer/ fault diagnosis filter/ neural network/ support vector machine分类
信息技术与安全科学引用本文复制引用
YAN Bing-yong,TIAN Zuo-hua,SHI Song-jiao..Novel Fault Diagnosis Scheme for HVDC System via ESO[J].高电压技术,2007,33(11):88-93,6.基金项目
Project Supported by National Natural Science Foundation of China(60574081). （60574081）
