| In recent years,new sensing technology has entered a new era of development.Distributed optical fiber temperature sensor(DTS)[1]as a new sensing technology,all walks of life have carried out different degrees of research.Based on the backscattering phenomenon and the optical time domain reflection theory,it can measure the temperature values of all points on the optical fiber in the form of continuous function of distance on the length of the whole optical fiber.With the development of society,distributed optical fiber technology has been widely used and popularized.In the power sector,work found laying power cables need to be buried,unable to detect the temperature,pressure and stress and other physical parameters,if the distributed optical fiber temperature sensor is applied to the power cable,it can detect the cable temperature,pressure and stress data,timely detection of aging and bending failure the cable,reduce line outage time,improve the power supply reliability rate.After work,we do theoretical research and time tests,puts forward the main design ideas,mainly for the application of DTS system in the substation,the most basic,the main equipment is improved without increasing the cost of the host device based on design,more friendly interface,to improve the system temperature and spatial resolution possible.In this paper,through a comprehensive analysis of the theory of distributed optical fiber temperature sensor,and puts forward the method of multiple reference points of temperature demodulation,and the design and implementation of the system,completed the design and hardware implementation of each module in the light source,and puts forward some methods in the application of power system and installation method.Discusses the research status of distributed optical fiber temperature sensor at home and abroad,according to the traditional DTS to update parameters,and it is difficult to overcome the DC bias,non-constant gain is proposed temperature demodulation scheme based on multiple reference points,through theoretical analysis and calculation,the error influence gives the demodulation algorithm of multiple reference points and main parameters the.The modules except the light source are designed and implemented, which are ready for independent optimization of system configuration and optimization of system resources,laying the foundation for the realization of the system's on-chip implementation.The software flow of the upper computer is given.The main ways of the application of the system in the substation are discussed,and the new idea of installation is given. |
