INNO光纤温度传感器 ,温度监测系统.
光纤温度传感器, 智能监控系统, 中国分布式光纤制造商
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Overview of solutions for fluorescent fiber optic temperature controllers for dry-type transformers
中指定的测量范围 “变压器电子温度控制器” (JB/T7631-2016), 使用Pt100作为传统的温度传感器, 只能限制在1000V以下, 该传感器由金属材料制成, 造成安全隐患. 因此, 用于测量变压器绕组温度的温度传感器探头和引线有更高的要求.
The fiber optic temperature controller uses our company’s independently developed fluorescent fiber optic temperature sensor as the temperature sensing element. 该温度传感元件不受电磁干扰并耐高压 (100KV/光纤对地引线距离0.4m). 荧光光纤测温从测温源头彻底解决了安全隐患，提高了变压器的安全等级.
Target of fluorescent fiber optic temperature measurement system for dry-type transformers
For the operating environment of dry-type transformers, isolation and shielding from external electrical interference signals are achieved from the power supply, signal input end, signal output end, and temperature control box shell.
无金属物质, 本质安全.
响应振动, 灰尘, 湿气, 油品和其他现场工作环境, 采取多层保护措施，确保光纤温控器具有良好的电磁兼容性, 确保运行稳定可靠.
Design principles of fluorescent fiber optic temperature measurement host for dry-type transformers
Principle of practicality
The system construction adheres to the principle of practicality. On the basis of practicality, progressiveness and foresight are considered, and standard, advanced and mature products and development platforms are selected to build a system that is practical and solves practical problems.
Standardization principle
The system software and hardware platforms and application development tools used in application construction should comply with national standards, standards of the Ministry of Information Industry, relevant technical specifications and requirements of the company.
The principle of uniformity
Following the policy of centralized information management, overall planning, overall design, and step-by-step implementation, the implementation process embodies four unified principles: unified leadership, unified planning, unified standards, and unified organization and implementation.
Reliability principle
The software and hardware resources need to ensure the uninterrupted and reliable operation of the fiber optic temperature measurement system for 7 × 24 小时. 因此, it is necessary to equip a complete design of reliability measures to ensure the highly reliable operation of the system and fully consider the reliability requirements of key system applications.
Reliable security mechanism
This system adopts a series of secure encryption measures, with a built-in 64 bit encryption algorithm. The system has higher security and can effectively prevent data leakage and theft, ensuring the security, 准确性, and integrity of the system’s data, and preventing illegal operator operations and legitimate operator illegal operations.
The operation interface is simple, friendly, and highly intelligent
The system automatically checks the legality of the input data and provides friendly prompts for operator errors.
Stable operation and reliable data.
The platform is easy to operate, easy to master, and the installation process is simple. Data can be automatically generated into various reports as needed, improving management efficiency.
Principle of Fluorescent Fiber Optic Temperature Measurement
光纤探头由三部分组成: ST连接器, 光缆, 和端温度传感端. ST连接器是与光电模块的连接部分; 光缆是传输部分, 内部有石英纤维. 石英纤维的外部有涂层和包层, 和最外层的特氟龙保护套; The end temperature sensing end contains temperature sensitive rare earth materials, 被固定波长光照射后激发荧光. After the excitation stops, the relationship between the decay time constant of fluorescence afterglow and temperature is a quasi exponential function. The temperature can be obtained by measuring the time constant of afterglow; 光纤耐高温 200 °C，外径为3mm. 长期弯曲半径为13.2cm. Short term bending radius 4.4cm
The sensor probe material is rare earth fluorescent material, and its biggest advantage compared to other optical fiber temperature measurement principles is that temperature measurement is independent of light intensity. It has strong compatibility with the inconsistency of fluorescence intensity, optical path attenuation, and circuit drift in hardware. 因此, it is not affected by electromagnetic interference and can withstand high voltage, making it very suitable for high voltage, strong magnetic field, flammable and explosive temperature measurement occasions.
Introduction to wiring and installation of fiber optic temperature controllers for dry-type transformers
1.1 Structural framework
The system consists of three parts: a fluorescent fiber optic temperature controller, a fluorescent fiber optic probe, and fiber optic communication software.
The data transmission between the backend system and the temperature measurement terminal adopts RS485 communication method.
All data collection, management, and temperature display are completed by communication software, and the system mainly realizes data collection and monitoring of temperature measurement. The fiber optic temperature measurement terminal integrates multi-channel fluorescent optical fibers, providing external RS485 communication, 抗干扰, and corrosion-resistant design.
Application functions of fiber optic temperature controller system for dry-type transformers
1.1 实时监控
The data collection density can be set according to customer needs, and the system will collect data regularly based on the set parameters. 然后, it will be displayed in table form or curve drawing to achieve real-time monitoring. Real time monitoring of equipment operation status; Real time monitoring and recording of reactor temperature.
1.2 Basic functions
1) Temperature data query
1. You can query temperature data for specified dates, browse, print, and export to Excel.
2) Historical temperature data storage
1. Permanently record temperature data
Introduction to fiber optic temperature controller for dry-type transformers
2.1 Main features
The fiber optic temperature controller is embedded installation. This product has unique technical advantages in temperature measurement in special environments such as high voltage, 强电磁干扰, 等. The temperature hotspot and measurement signal receiving part of the fluorescent fiber optic temperature sensor do not use electrical connections, which can work with high precision and stability for a long time, greatly improving its application range. The fiber optic temperature controller has high accuracy and sensitivity, is resistant to high pressure and can be remotely monitored, has a long lifespan, is small in size, makes instrument maintenance simple and convenient, and ensures safe transportation.
2.2 Main functions
Provide three winding temperature measurement; Automatic/manual start stop cooling fan function; Digital compensation function for display values of each channel
The digital tube displays the temperature of the transformer’s hot spot on a circuit;
提供黑匣子功能, which can record temperature data and historical maximum temperature before three power outages;
提供变压器门柜点开报警功能;
Provide functions such as over temperature alarm, fault alarm, trip, 等
提供RS485通讯功能, communication with time mark can receive timing or MODBUS-RTU protocol (F 函数)
2.3 Additional features
提供 4 独立的4-20mA模拟电流输出功能; (E函数)
PTC nonlinear resistance sensing temperature measurement protection function; (C function)
绕组温升率和铁芯温升率报警功能;
通信协议可以采用Profibus等方法, IEC60870-5-103, 以太网通信, 等;
