Temperature Monitoring System Design And Thermal Aging Mechanisms Study Of High-voltage Cable Connector

On the high-voltage transmission lines, the running status of cables is the most concerning by the staff. High-voltage cable accessories are the most critical components of the cable network, they are also the most vulnerable components of the cable network safe running. Studies show most insulation defect can cause the temperature rising of the body or partial cable accessories, meanwhile, when the load or environment temperature increased, the temperature of cable connector will also rise. The cable connector may thermal breakdown even explode when the temperature is over critical value of cable accessories, leading to great power failure or fire. The on-line temperature monitoring system can easily monitor the real-time status of cable, timely alarm, and effectively avoid cable fire accident.Because of the easily thermal breakdown of the high voltage cable connector, the article studies the thermal aging mechanisms of the high voltage cable connector. Through the experiment of the high–voltage cable accelerated thermal aging, the article measured the weight loss rate and the tensile strength of the insulation material under different aging condition. The article using the concept of aging damage factor, discuss the relationship between the aging damage factor concept and the aging damage times and temperature, expounding that the nature cause of the thermal aging mechanisms is the change of its internal physical or chemical structure. Meanwhile, abroad on the summarizing of the power cable connector temperature monitoring and according to comparing to the monitoring technology of the thermal resistance, temperature sensing cable, ionization smoke and the distributed fiber, the article distribute a method of wireless date transmission. The monitor system is composed of temperature gathering module, data processing module, wireless transmission module, throughing to the system hardware and the software design, the high-voltage cable connector temperature could realtime display on PC machine, the system may also realize ultra warm reporting function. The system uses the design of low power, effective prevent high-voltage cable connector attachment breakdown, it could be a good application prospect.