Capteurs de température à fibre optique INNO ,Systèmes de surveillance de la température.
Capteur de température à fibre optique, Système de surveillance intelligent, Fabricant de fibre optique distribuée en Chine
 |
 |
 |
Overview of solutions for fluorescent fiber optic temperature controllers for dry-type transformers
La plage de mesure spécifiée dans le “Régulateur électronique de température pour transformateurs” (JB/T7631-2016), qui utilise le Pt100 comme capteur de température traditionnel, ne peut être limité qu’à moins de 1000V, Et ce capteur est fait d’un matériau métallique, qui présente un risque pour la sécurité. Donc, Les sondes de capteur de température et les fils pour mesurer la température d’enroulement du transformateur ont des exigences plus élevées.
The fiber optic temperature controller uses our company’s independently developed fluorescent fiber optic temperature sensor as the temperature sensing element. Cet élément de détection de température est insensible aux interférences électromagnétiques et résistant aux hautes tensions (100Distance KV/fibre à la terre de 0,4 m). La mesure de la température par fibre optique fluorescente résout complètement les risques potentiels pour la sécurité à la source de la mesure de la température et améliore le niveau de sécurité des transformateurs.
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.
Pas de substances métalliques, Sécurité intrinsèque.
En réponse aux vibrations, poussière, humidité, huile et autres environnements de travail sur site, Des mesures de protection multicouches sont prises pour s’assurer que le régulateur de température à fibre optique a une bonne compatibilité électromagnétique, Assurer un fonctionnement stable et fiable.
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 Heures. Donc, 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, accuracy, 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
The fiber optic probe consists of three parts: ST connector, fiber optic cable, and end temperature sensing end. The ST connector is the connection part with the photoelectric module; Fiber optic cable is the transmission part, with quartz fiber inside. The quartz fiber has a coating and cladding on the outside, and a Teflon protective sleeve on the outermost part; The end temperature sensing end contains temperature sensitive rare earth materials, qui excitent la fluorescence après avoir été irradiés par une lumière à longueur d’onde fixe. 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; The optical fiber is resistant to high temperatures of 200 ℃ and has an outer diameter of 3mm. Long term bending radius of 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. Donc, 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, anti-interférence, and corrosion-resistant design.
Application functions of fiber optic temperature controller system for dry-type transformers
1.1 Surveillance en temps réel
The data collection density can be set according to customer needs, and the system will collect data regularly based on the set parameters. Alors, 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, strong electromagnetic interference, etc. 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; Démarrage automatique/manuel, arrêt, fonction de ventilateur de refroidissement; Fonction de compensation numérique pour l’affichage des valeurs de chaque canal
The digital tube displays the temperature of the transformer’s hot spot on a circuit;
Fournir une fonction de boîte noire, which can record temperature data and historical maximum temperature before three power outages;
Fournir une fonction d’alarme d’ouverture de point d’armoire de porte de transformateur;
Provide functions such as over temperature alarm, fault alarm, trip, etc
Fournir une fonction de communication RS485, communication with time mark can receive timing or MODBUS-RTU protocol (Fonction F)
2.3 Caractéristiques supplémentaires
Fournir 4 fonctions de sortie de courant analogique indépendantes 4-20mA; (Fonction E)
PTC nonlinear resistance sensing temperature measurement protection function; (C function)
Fonction d’alarme pour le taux d’élévation de la température de l’enroulement et le taux d’élévation de la température du noyau de fer;
Le protocole de communication peut adopter des méthodes telles que Profibus, IEC60870-5-103, Communication Ethernet, etc;
