INNO 光ファイバー温度センサー ,温度監視システム.
Power cables are cables used for transmitting and distributing electrical energy in power systems. Compared with overhead power lines, power cable power supply has the advantages of high transmission reliability, small insulation distance between lines, less land occupation, no ground space occupation, strong confidentiality, and easy to significantly improve power supply capacity. したがって, with the development of urbanization and urban power grids, power cables have been widely used. しかし, in the process of use, power cables also have disadvantages such as high cost, difficulty in fault detection and maintenance, high process requirements for power cable accessories (intermediate joints, terminal joints, 等), and on-site construction operations requiring workers to have high operational skills. With the increase in the number of cables used and the improvement of transmission capacity, the operational reliability of power cables is increasingly valued due to the serious harm caused by faults.
Fluorescent fiber optic temperature measurement device for cable joints
Effective monitoring of the temperature of intermediate joints in power cables can determine local hotspots, 絶縁体の劣化状態を評価する, and promptly identify safety hazards through real-time monitoring values and historical temperature values; 同時に, real-time monitoring values can also be used to calculate the temperature of the core conductor, これは信頼性を確保する上で非常に重要です, 安定性, 電力ケーブルの容量を合理的に利用して負荷を調整し、許容範囲内で容量を動的に増加させることで、電力システムの経済性を高めます。. In the power supply line, the intermediate joint of the cable is the weakest link in the safe operation of the power system. 統計によると, cable joint accidents account for 90% of cable accidents. The reason is that cable joints have problems such as poor contact, 緩い圧縮ジョイント, 損傷した絶縁強度. 電気負荷が増加したり高温になったりする環境, abnormal temperature rise may occur, which not only leads to cable damage but also inevitably causes widespread power outages and even fire accidents.
Distributed Fiber Optic High Voltage Cable Temperature Measurement System
The basic working principle of fiber optic sensors
Fiber optic sensors send optical signals from a light source through optical fibers into a modulator, where the measured parameters interact with the light entering the modulation region, causing changes in the optical properties of the light (強度などの, 波長, 頻度, 段階, 偏光状態, 等) and becoming the modulated signal source. After being sent through optical fibers into a photodetector and demodulated, 測定されたパラメータが取得されます. 電力システム内, 温度や電流などのパラメータを測定する必要がある, such as temperature detection inside the stator and rotor of high-voltage transformers and large motors. 電気センサーは電磁干渉を受けやすいため, they cannot be used in such situations and can only use fiber optic sensors.
の特徴 分散型光ファイバー temperature sensing device
の 分散型光ファイバー温度検知システム not only has the advantages of universal fiber optic sensors, but also has the ability to sense the temperature distribution of various points along the fiber optic line. With this feature, we can continuously measure the temperature of various points along the fiber optic line in real time, with a positioning accuracy of meters and a measurement accuracy of 1 程度. It is very suitable for large-scale intersection temperature measurement applications. In current market applications, most of them are pre installed in fixed positions on the ground through pre embedding, which is not convenient for flexible movement, and to some extent requires a large quantity through pre embedding, undoubtedly increasing investment costs. The use of distributed fiber optic temperature measurement principle to monitor the temperature of cable bodies and tunnels is one of the important means to improve the operation and management level of cables and channels, especially widely used in ultra-high voltage cable lines. 現在のところ, State Grid Corporation of China stipulates that cable distributed fiber optic temperature measurement systems must be installed in cable channels above level two.
光ファイバー温度センサー, インテリジェント監視システム, 中国の分散型光ファイバーメーカー
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