The Lightning Protection Design And Engineering Practice Of Remote Video Surveillance System In The Underground Power Station Tailrace Tunnel In Three Gorges Project

With the rapid development of the national economy, the proportion of hydraulic engineering in the national economy is increasing day by day,the construction of hydraulic information is also a very important aspect to directly impact on the development of water resources.The dam video surveillance system can effectively realize the modern management and intelligent operation of hydraulic engineering.However,the video surveillance system of hydropower industry generally operates in the damp,dust,strong electromagnetic interference and other adverse environmental conditions.Therefore,to form a Video Surveillance System ,which could run stably,reliably, expediently in long-term and transfer clear picture becomes our goal.To meet the requirements of management and monitoring to the construction site of the underground power station tailrace tunnel in Three Gorges project,the Hydropower Inistitute in Huazhong University of Science and Technology and the headquarters of the Three Gorges Project in Gezhouba Group Corporation,completed the"underground power station tailrace tunnel Video Surveillance System"Project,this project has been put into operation.Based on analyzing the the second construction stage of 150 Project Management Dept,combined with the third construction stage,especially the characteristics of the underground power station tailrace tunnel, this project makes a plan and construction organization further and aims at the construction site for lightning-prone areas,vulnerable to lightning damage to the monitoring equipment,this project makes a lightning surge protection system designed to ensure the safe and stable operation from power lines,communication lines and control lines to meet the requirements,which is growing day by day,of quality,safety and management in construction site for greater project management level.Taking Three Gorges underground power station tailrace tunnel as a main background, this article discusses the compositon and structure of the normal Video Surveillance System and analyses system's key theory and technology; on this basis, this paper explains the design of tailrace tunnel Video Surveillance System in detail,focusing on the measure of preventing the lightning surge; then, combining with the practice of fixing, debugging and troubleshooting in tailrace tunnel,this paper summes up the experience and the lessons learned from this project;finally,the paper makes a summary and outlook,presentes the problems existing int the system and also imagines the aspects which can be improved in future.