1、The advantages of optical fiber sensors

   In recent years, optical communication technology has developed rapidly. As an important component, optical fiber sensor has received extensive attention. Compared with traditional sensing structure, its advantages are as follows:  

(1)  It has a certain anti-electromagnetic interference performance.  In the stage of data collection, transmission and processing, it mainly depends on the light source. Generally, the frequency of light wave is higher than that of electromagnetic radiation, and the transmission of light in the optical fiber will not be affected by electromagnetic.  

(2)  Its small size and simple structure, light, flexible and easy to install.  

(3)  has good corrosion resistance, because its outer structure mainly for molecular materials, ph environment will not affect formation, at the same time, the durability of the device itself is good, not because of other factors affect the aging condition, the overall system processing pattern and structure is relatively stable, low maintenance cost, reusable resistance, good economic benefit.  

(4)  High sensitivity  

(5)  It has the advantage of distributed measurement.  Compared with traditional sensors, optical fiber sensors have obvious advantages in transmission.  

2、Application of optical fiber sensor in power system

2.1  Application of optical fiber current (magnetic field) sensor

   Faraday effect is the main principle of optical fiber current (magnetic field) sensor.  The magnetic field formed by the current will lead to the rotation of linearly polarized light in the optical fiber in the magnetic field, and the corresponding current value can be obtained by combining with the monitoring of deviated Angle urine and feces.  Through the effective use of fiber optic sensor, information can through laser laser, based on the role of the analyzer, linear polarized into effective output, through the microscope will all kinds of light aggregate, and turned over in the single mode fiber, its around the high pressure then leave a conductor, influenced by outside factors such as magnetic field from the other side of the fiber output,  The second group of microscopes is then utilized to make the output fiber turned on wollaston prism and processed into the light detector.  This stage can not only eliminate the influence of external factors, provide guarantee for measurement, but also be applied to the new energy of electric power, which helps to improve productivity. 

 2.2  Application of optical cable monitoring in power system

   Whether the optical cable line is in normal operation is of great significance to the use of resources and the development of new power sources.  Therefore, it is necessary to do a good job of cable monitoring, timely discovery of problems, effectively prevent faults.  For the traditional sensor, because it does not have good security and stability, vulnerable to the influence of external factors, so in the optical cable monitoring process, climate, temperature and so on will affect the monitoring results, can not ensure its accuracy.  Because of its unique advantages, the optical fiber sensor can adapt to the complex environment and help to guarantee the accuracy of the monitoring results.  Combined with the analysis of the current situation, China's new energy optical cable monitoring by artificial methods using optical time domain reflectometer monitoring, its monitoring accuracy still needs to be improved.  So fiber optic sensor with its own advantages in optical cable monitoring application more and more widely.  

2.3  Application in temperature and strain measurement of power system

   Fiber optic sensor can accurately measure the temperature and strain of high voltage cable, but it is not widely used in China due to the influence of extreme and inclement weather and science and technology.  

2.4  Application in power system power

   The main function of electric power is to ensure the effective conversion of energy in the power system, carry out the basic electricity conduction, and measure the electric power, which has a very important role.  So in the monitoring of electrical power, not only need to ensure their own specifications and energy consumption is small, but also need to have a certain anti-interference performance and stability, in addition to the need to have a good network capacity, not only the overall frequency to maintain a wider, and in the process of monitoring to achieve remote control.  Optical fiber sensor can fully meet the above requirements, the technology has been widely used in foreign countries, parts of Our country also began to apply it to the temperature measuring element transformation project and smart substation construction project, can achieve remote control.  With the development of science and technology and power system, optical fiber sensor will also play an important role in power monitoring.  

   The application of optical fiber sensor in power system is helpful to improve the stability and reliability of power transmission and ensure the safety of system equipment.