As características da medição de temperatura sem fio e medição de temperatura de fibra óptica em painéis-INNO

A necessidade de medição de temperatura em comutadores

É um dispositivo importante no sistema de energia e amplamente utilizado em diversas indústrias. O quadro de distribuição ou gabinete de distribuição é um termo geral para o centro de controle de motores, qual é o equipamento de nível final do sistema de distribuição; O armário de distribuição é utilizado em situações com cargas concentradas e múltiplos circuitos, responsável por distribuir a energia elétrica de um determinado circuito do equipamento de distribuição de nível superior para a carga mais próxima. A temperatura do quadro é alta durante o uso, e os componentes elétricos que operam em ambientes de alta temperatura são propensos a vazamentos e autoignição. Portanto, é necessário medir a temperatura do quadro, as the temperature of the electrical components inside the cabinet needs to be monitored during use to avoid safety accidents caused by high temperatures. Due to issues such as poor contact of the contacts and overcurrent of the load, the temperature of the contacts in the switchgear can be too high, causing damage to the contacts and resulting in power outages. Portanto, it is necessary to monitor the temperature of the contacts in real time, and when it exceeds the threshold, an alarm can be triggered for timely maintenance and handling.

How many types of temperature measurement for switchgear

The commonly used methods currently include using infrared thermometers for regular inspections or using online monitoring equipment for real-time monitoring, as there may be issues with missed inspections and untimely detection during regular inspections. Portanto, online monitoring is currently commonly used. Online monitoring mainly uses fiber optic temperature measurement, infrared probes, sensores de temperatura sem fio and other online measurements.

Medição de temperatura sem fio para quadro de distribuição

Atualmente, temperature measurement methods for power plants, subestações, high-voltage lines, high-voltage electrical appliances, rolamentos de turbina eólica, distribution cabinets, passenger trains, glass processing, tobacco processing and other equipment and places with strict temperature range requirements and relatively dangerous measurement environments mainly include manual measurement and wired measurement. The drawbacks and shortcomings of these methods are: firstly, manual measurement poses great risks because the equipment and places being measured are high voltage, high-altitude, and difficult to access, which can easily cause harm to measurement personnel. The wireless temperature measurement system includes a wireless temperature measurement terminal, a wireless temperature measurement management machine, and a on-site computer. The wireless temperature measurement terminal converts the measured temperature parameters into wireless signals and transmits them to the wireless temperature measurement management machine. The wireless temperature measurement management machine transmits the temperature parameters to the on-site computer through Ethernet.

Medição de temperatura de fibra óptica para painéis de distribuição

The fiber optic temperature measurement system for switchgear is a fluorescence fiber optic temperature measurement device developed by FJINNO, which is applied to high-voltage switchgear. It has a long service life and is resistant to electromagnetic interference. It can provide effective protection for temperature monitoring of high-voltage switchgear and other equipment in substations, judge the equipment’s ability and service life, and provide scientific basis for safe operation of equipment. Adopting internationally advanced fluorescent fiber optic temperature sensing technology, it has the advantages of high voltage resistance, sem interferência eletromagnética, confiabilidade a longo prazo, and easy expansion. It is used for real-time online monitoring of the temperature of monitoring points such as generators, aparelhagem de alta tensão, ring main cabinets, outdoor and underground cable joints in power generation and supply systems.

Mainly for real-time online monitoring of abnormal temperature changes in the dynamic and static contacts, barramentos, interruptores, and other contacts of power switchgear in substations. Com este sistema, users can monitor the temperature changes in the monitored parts of the switchgear in real time on both local and remote upper computers, e emitir relatórios de alarme em tempo real (avisos, alarmes, e ultrapassando limites) com base nas mudanças de temperatura. Ao mesmo tempo, com a ajuda de poderosas funções superiores do computador, é possível analisar o ciclo de mudança de temperatura, visualizar curvas históricas e em tempo real, prever mudanças em situações de alarme, and achieve remote data exchange among multiple users. The system consists of fluorescent fiber optic (incluindo cabeça de detecção), transmissor de temperatura de fibra óptica, fluorescent fiber optic communication software, system meter head, etc..

A fluorescência fiber optic online temperature measurement system is mainly designed for real-time online monitoring of parts that are prone to high temperature during long-term operation of switchgear and transformers (upper and lower contacts and joints of switchgear; enrolamentos do transformador, núcleos de ferro, etc.), to avoid unnecessary losses caused by high temperature due to heavy loads.

The fluorescence fiber optic online temperature measurement system mainly includes: optical path system, photoelectric conversion system, data acquisition and processing system, and data display and output equipment. The light from the light source is transmitted to an external sensor through a light splitter. The sensor reflects back light of a specific wavelength, which is then transmitted to the photoelectric conversion system through the light splitter. The photoelectric detector converts the wavelength signal into an electrical signal, collects the electrical signal from the photoelectric detector, processes it, and converts the electrical signal into a digital signal. Transfer to the data display output device through a network or serial port.

Functional characteristics of fiber optic temperature measurement system for switchgear

Segurança: Compared to traditional sensors, fiber optic temperature sensors have high temperature resistance, passividade, and are not affected by strong electric and magnetic fields.

Tempo real: Real time uninterrupted online monitoring ensures that equipment is in a monitored state at all times, and safety is not affected by human factors, minimizing the probability of accidents that may be caused by personnel negligence.

Progressividade: The fluorescent optical fiber online temperature measurement system collects data through the sensor wavelength shift, which is a digital measurement, avoiding the problem that traditional sensors are vulnerable to interference factors such as power fluctuations, transmission line losses, etc..

Precisão: Digital measurement technology ensures temperature measurement accuracy and repeatability, with a temperature measurement accuracy of level 1 and a temperature resolution of 0.1 ℃. It also has the characteristic of fast response speed, que pode atender plenamente às necessidades de segurança do sistema de energia.

Estabilidade: O sensor de temperatura é sensível apenas à temperatura e não é afetado por fatores como vibração, impacto, deslocamento, umidade, etc.. O sistema é estável e confiável.