Optical Fiber Temperature Measurement Technology In Power System

With China’s economic development and social progress, increasing the operating capacity of the grid, the network structure of the power systems become more and more complicated, reflecting the distribution of a wide range of multi-node, long transmission distance, high supply voltage. For electrical equipment in high-voltage, high-current state, its reliability and equipment fever is closely related to that equipment, the higher the temperature, the worse the reliability. Grid for electrical equipment parts of the equipment from overheating and safety incidents occur frequently, according to statistics,80% of the cause of the accident with equipment overheating power system accident to run in order to grid security and stability, in order tofind various hidden in a timely manner, in order to guard against all kinds of accidents, it must be the system of grid lines, equipment temperature monitoring. How real-time and accurate monitoring of the temperature state of the line equipment, and is directly related to production safety and stable operation of the power system. In recent years, the optical fiber by virtue of its low loss and bandwidth resource-rich, high voltage, anti-electromagnetic interference, etc., attracted widespread attention in the field of power grid monitoring. Optical fiber temperature measurement technology to achieve real-time on-line for the first run of power system equipment and multi-point detection, analysis and forecasting real-time data on equipment to prevent accidents, really to be done to take preventive measures. The state overhaul for the future, greatly reducing maintenance costs and management costs, improve maintenance efficiency play a key role.This paper focuses on optical fiber temperature measurement technology, the application of distributed optical fiber temperature measurement technology and fiber grating temperature measurement technology in power system studies. First expounded the theoretical basis of the optical fiber temperature measurement, followed by analysis of the advantages and disadvantages of optical fiber temperature measurement technology for optical fiber temperature measurement technology as well as domestic and foreign Research, determined to distributed optical fiber temperature measurement technology and fiber grating temperature measurement technology This article is the main object of study. Then combined with actual work, distributed optical fiber temperature measurement techniques (especially in the power system in the substation) the actual installation and application to do a specific analysis and research (mainly cable, the middle joint, high voltage cabinet, switchgear movement jointslikely to have a high temperature hazards of equipment) summarizes several major advantages of distributed optical fiber temperature measurement system is relatively conventional sensors, and according to the actual situation:1, install fiber does not reduce the level of insulation of electrical equipment.2. Temperature, electromagnetic field fiber insulation level basic impact. The overvoltage, condensation, filthy, salt, fiber insulation level basically does not have an impact. Distributed optical fiber temperature sensing fault early warning system will not overhaul the pretest cause problems. The system has a maintenance-free characteristics. Finally, the reality of the work, the actual installation of fiber optic the grating temperature measurement technology in the power system and application specific analysis, and in-depth study of a fiber grating temperature measurement technology solutions for real-time temperature monitoring in the 110KV transformer.