Research On Live Detection Of Insulator And Real-time Transmission Technology

With the development of power system,the voltage of the system is getting higher and higher.As an extremely special insulation control,a large number of insulators are distributed in high voltage transmission lines.Due to the harsh natural environment insulators are involved,lightning,long-term power frequency voltage and the quality of the insulator can easily lead to defects in the insulator.The defects of insulators include surface defects and internal bubbles,cracks and breakage.If the defective insulators are not eliminated in time,they will develop into flashover discharge,which is a serious threat to the safe and stable operation of power system.In order to prevent the occurrence of flashover accident,realizing the monitoring of insulator charged defects,detecting faulty insulators in time,and achieving the change from scheduled maintenance to state maintenance are the problems which need timely to be solved to guarantee safe and reliable operation of the transmission line.At present,many methods have been developed both at home and abroad such as the observation method,the ultraviolet imaging method,the leakage current method,etc.But most of the existing methods are of large workload,long detection cycle,low sensitivity and low security issues.In order to solve the above problems,this paper presents a method to realize real-time transmission of defect detection and measurement of charged insulator electric field measurement method and technology to improve the measurement sensitivity and accuracy,which can detect the defects of the insulators in time,reduce the probability of fault occurrence,and ensure the safe and stable operation of the power grid.Based on the study of the causes and hazards of insulator defects,the detection principle of electric field measurement method was put forward,the influence law of insulator type pollution and moisture on electric field measurement method was analyzed,the feasibility of electric field measurement method was verified,and the technology of real-time wireless transmission was researched on,thus,this paper choose the Zig Bee technology to realize the measurement of edge edge generation electric field curve.Aiming at the possible interference in the detection process,this paper analyses the way into the interference of electric equipment,puts forward corresponding anti-interference measures of hardware and software,and the hardware and software of the detection system is designed,including the measurement circuit,the detectionprobe and the design of the data center management software,and finally the field measurement is carried out.By analyzing the results of the field test,it is found that the method of real-time transmission of the insulator has a high sensitivity in discovering the problem of insulator defects which is based on the electric field measurement method and the real-time transmission technology and the real-time transmission of the measurement information,realize the detection probe slides over the insulator string and the electric field curve is displayed in real time on the computer interface.That is,the real-time field data collection is realized and displayed on the remote detection platform in real time,and the operation is flexible and convenient.It is proved that the insulator defect detection method reliable,feasible,to meet the needs of engineering practice.The detection period is short,the time of troubleshooting is shortened and the efficiency of detection is improved.The electric field measurement method and real-time transmission technology studied in this paper have practical value,which can improve the reliability of power grid operation to a large extent safe and stable operation of power system.