Abstract
At present the detecting of ultra high voltage direct current (UHVDC) earth electrode frequently uses manual inspection. This method can't get the real-time operational data of the earth electrodes, and meanwhile, the labor cost is very high. In order to satisfy the security needs of UHVDC, this paper designs an on-line monitoring system for UHVDC earth electrode. By 3G wireless communication-technologies, the system can monitor remotely many kinds of data such as the value of the grounding current, water level of the observation well, soil temperature and humidity near the earth electrode, the micro-climate around the earth electrode site, video data, etc. Through analyzing the datum, the system has broad prospect on fault detection and life evaluation of the UHVDC earth electrode.
Highlights
Up to now, China has completed Xiangjiaba-Shanghai, Jinping-Sunan, South of Hami-East of Zhengzhou, Left bank of Xiluodu-Jinhua in Zhejiang ultra high voltage direct current (UHVDC) transmission projects
Because the operation time of UHVDC transmission is shorter, the operation datum are less, the on-line monitoring system for UHVDC earth electrode is rarely used, the operation data of UHVDC earth electrode basically rely on manual collection, the degree of automation is low, it can not meet the rapid development of UHVDC transmission system, so the on-line monitoring system for UHVDC earth electrode has very important realistic significance
The 3rd Generation (3G) wireless communication technology is used in the on-line monitoring system, compared with the previous design scheme based on global system for mobile communication (GSM) and general packet
Summary
China has completed Xiangjiaba-Shanghai, Jinping-Sunan, South of Hami-East of Zhengzhou, Left bank of Xiluodu-Jinhua in Zhejiang UHVDC transmission projects. The earth electrode is located in the field, so the monitoring data need long-distance transmission, the communication of on-line monitoring system for UHVDC earth electrode has special requirements. How to cite this paper: Ni, P.H., Wang, W. and Wei, P (2016) Design of On-Line Monitoring System for UHVDC Earth Electrode. The system can be used to diagnose the operation state and evaluate the life of the earth electrode
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