Design Of Power Cable Temperature Monitoring System In Power Supply Area

Online measuring temperature of power cable is related to the electric power enterprise daily maintenance and maintenance of power cable line,so the on-line power cable temperature measuring has very important influence to the enterprise.Text according to the current agricultural ZhuZe station of 524 lines,the method for the installation location,cable temperature sensor,information collecting structure is analyzed,and the upper machine is used to calculate the conductor temperature of inner core,and to determine a reasonable temperature range,to ensure the normal use of power cable,avoid premature aging.Then according to the calculated conductor temperature,combined with the power load is analyzed,and establish the early warning system,temperature for power supply enterprises provide maintenance advice.First based on the research status at home and abroad,combined with steady state when the thermal equivalent circuit of the cable and conductor resistance,power loss and the heat equation is set up,such as temperature measurement model,by measuring the insulation current,external temperature and conductor of conductor temperature is measured,and based on the power system steady state conditions were analyzed.Then according to the temperature measurement model set up a field temperature measurement device,this paper USES the optical fiber sensor to measuring temperature of power cable,and over to bundle sensors and cables,and fixed.According to the requirements of the circuit under test is actually at the same time,the design of sensor placement.Then,signal acquisition and data processing module of system design,hardware design of a complete system.Then carries on the design in this paper,the software of the system,the software design includes the lower machine data sending module design,PC interface and the database design,and the function of each module are introduced in detail.Finally using the test of the system testing sensor's temperature measurement function,and according to the existing model,temperature and current,the relationship between time.