How to measure the temperature of transformers in rail transit and the advantages of fiber optic temperature controllers-INNO

Fiber optic temperature measurement of rail transit transformers

Why does the traction power supply system of rail transit need to use fluorescent fiber optic temperature measurement
Os sistemas de fornecimento de energia para tração no trânsito ferroviário urbano na China são DC750V e DC1500V, correspondendo aos métodos de recolha actuais da rede de contactos aéreos e do terceiro carril, respectivamente. A tensão máxima do enrolamento secundário do transformador deste sistema de alimentação excedeu 1000V, mas a faixa de medição especificada no “Electronic Temperature Controller for Transformers” (JB/T7631-2016), que usa Pt100 como sensor de temperatura, só pode ser limitado abaixo de 1000V. Portanto, rail transit has higher voltage resistance requirements for temperature sensor probes and leads.

The fiber optic controlador de temperatura for rail transit uses fluorescent fiber optic temperature sensors as temperature sensing elements. This temperature sensing element is immune to electromagnetic interference and resistant to high voltage (100KV/fiber to ground lead distance of 0.4m). Fluorescent fiber optic temperature measurement completely cuts off the interference of temperature measurement elements transmitted to the temperature controller from the temperature measurement source, improving the safety level of rail transit.

Vantagens de Sistema de medição de temperatura de fibra óptica fluorescente Applied in Rail Transit
For the operating environment of rail transit 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.

The power supply system of rail transit traction power supply is based on DC750V and DC1500V, while the measurement range specified in the “Electronic Temperature Controller for Transformers” (JB/T7631-2005), que usa Pt100 como sensor de temperatura, só pode ser limitado abaixo de 1000V. Portanto, the fiber optic temperature controller has extremely strong voltage resistance and can withstand 100KV.

In response to vibration, pó, umidade, oil pollution and other on-site working environments, multi-layer protective measures are taken to ensure that the optical fiber temperature controller for rail transit has good electromagnetic compatibility, ensuring the stable and reliable operation of the temperature controller.

Design principles of fluorescence fiber optic temperature measurement system
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
Seguindo a política de gestão centralizada da informação, planejamento geral, projeto geral, e implementação passo a passo, o processo de implementação incorpora quatro princípios unificados: liderança unificada, planejamento unificado, padrões unificados, e organização e implementação unificadas.
Princípio de confiabilidade
The software and hardware resources need to ensure the uninterrupted and reliable operation of the fiber optic temperature measurement system for 7 × 24 horas. Portanto, 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.
Mecanismo de segurança confiável
Este sistema adota uma série de medidas de criptografia seguras, com um embutido 64 algoritmo de criptografia de bits. The system has higher security and can effectively prevent data leakage and theft, ensuring the security, precisão, 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
O sistema verifica automaticamente a legalidade dos dados de entrada e fornece avisos amigáveis para erros do operador.
Stable operation and reliable data.
A plataforma é fácil de operar, fácil de dominar, and the installation process is simple. Data can be automatically generated into various reports as needed, improving management efficiency.

Introduction to wiring and installation of fiber optic temperature controllers for rail transit
Structural framework
O sistema consiste em três partes: a fluorescent fiber optic temperature controller, uma sonda de fibra óptica fluorescente, e software de comunicação de fibra óptica.

The data transmission between the backend system and the temperature measurement terminal adopts RS485 communication method.

All data collection, gerenciamento, 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-interferência, and corrosion-resistant design.

Application functions of optical fiber temperature measurement system in rail transit
Monitoramento em tempo real
A densidade de coleta de dados pode ser definida de acordo com as necessidades do cliente, e o sistema coletará dados regularmente com base nos parâmetros definidos. Então, ele será exibido em forma de tabela ou desenho de curva para obter monitoramento em tempo real. Monitoramento em tempo real do status de operação do equipamento; Monitoramento e registro em tempo real da temperatura do reator.

Basic functions of optical fiber temperature measurement system for rail transit
1) Consulta de dados de temperatura

1. Você pode consultar dados de temperatura para datas específicas, navegar, imprimir, e exportar para Excel.

2) Armazenamento histórico de dados de temperatura

1. Registrar permanentemente dados de temperatura

Introduction to Fiber Optic Temperature Controllers for Rail Transit
main features
The fiber optic temperature controller for rail transit is embedded installation. This product has unique technical advantages in temperature measurement in special environments such as high voltage, forte interferência eletromagnética, etc.. The temperature hotspot and measurement signal receiving part of the sensor de temperatura de fibra óptica fluorescente do not use electrical connections, que pode funcionar com alta precisão e estabilidade por um longo tempo, melhorando significativamente sua faixa de aplicação. The fiber optic temperature controller has high accuracy and sensitivity, is resistant to high pressure and can be remotely monitored, has a long lifespan, é de tamanho pequeno, torna a manutenção do instrumento simples e conveniente, and ensures safe transportation.

Main functions of optical fiber temperature controllers for rail transit
Provide three winding temperature measurement; Função de ventilador de resfriamento de partida automática/manual; Função de compensação digital para valores de exibição de cada canal
LCD liquid crystal display patrols to display the temperature of transformer hotspots; Provide clock function;
Fornece função de caixa preta, which can record temperature data and historical maximum temperature before three power outages;
Fornece função de alarme de abertura do ponto do gabinete da porta do transformador;
Fornecer 2 pairs of over temperature alarm contacts (one normally open and one normally closed);
Fornecer 6 pairs of over temperature trip contacts (three normally open and three normally closed);
Fornecer 2 pairs of iron core alarm contacts (one normally open and one normally closed);
Fornecer 2 pairs of remote transmission contacts for fans (one normally open and one normally closed);
Fornecer 2 pairs of temperature controller power-off alarm contacts (one normally open and one normally closed);
Fornecer 2 pairs of temperature controller fault alarm contacts (one normally open and one normally closed);
Função de diagnóstico de falha do ventilador e fornecimento de contatos de alarme de falha do ventilador (Função L);
One iron core temperature measurement and one iron core over temperature alarm contact (eu funciono);
Fornece função de comunicação RS485, communication with time mark can receive timing or MODBUS-RTU protocol (Função F)
Additional functions of optical fiber temperature measurement system for rail transit
Fornecer 4 funções de saída de corrente analógica independente 4-20mA; (Função E)
PTC nonlinear resistance sensing temperature measurement protection function; (C function)
Função de alarme para taxa de aumento de temperatura do enrolamento e taxa de aumento de temperatura do núcleo de ferro;
O protocolo de comunicação pode adotar métodos como Profibus, IEC60870-5-103, Comunicação Ethernet, etc.;