Why do power substations need to monitor temperature-INNO

The development of the national economy has led to a rapid increase in electricity demand, and the scale of China’s power system construction has also been rapidly expanding. The coverage and circuits of the power supply network continue to increase, and a large number of substations are constantly being built. The development status of the power grid requires further reduction of substation construction costs, improvement of economic benefits and labor productivity, and assurance of power supply safety and quality to improve service levels for users while expanding capacity. Para este propósito, the substation needs to adopt advanced technology to improve its automation level, and achieve unmanned duty and dispatch automation through the “four remote” função. While improving the safe operation level of substations, it is also necessary to ensure the stable performance and high reliability of substation automation equipment.

The primary equipment in the substation, especially the moving and stationary contact parts of the isolation switch and the cable head, have prominent thermal phenomena and a high failure rate. Especially due to the poor quality of cable joint production, loose crimping, and high contact resistance, equipment overheating can occur when the load increases, e em casos graves, it can lead to fire. Atualmente, most of the temperature monitoring of primary equipment joints still relies on regular completion by staff, which is time-consuming, labor-intensive, and extremely inefficient. Some temperature monitoring points or joints of power equipment are located in difficult to reach positions, and hidden dangers cannot be detected in a timely manner. Para evitar tais acidentes, tecnologia de sensor apropriada deve ser usada para monitorar a temperatura do equipamento primário em tempo hábil e melhorar a confiabilidade do fornecimento de energia.

Durante a expansão da rede elétrica, quando o equipamento primário na subestação, como contatos de interruptor de isolamento, pontos de transição de barramento, e linhas de entrada e saída de cabos de alimentação, gerar calor devido ao mau contato nas juntas, pode causar envelhecimento do isolamento nas juntas e causar acidentes. Em operação real, o processo gradual de falhas de degradação do isolamento também é acompanhado por aquecimento anormal no ponto de falha, manifestado especificamente como um aumento anormal de temperatura no ponto de falha. Monitoring the operating status of a device by measuring the temperature of its isolation switch contacts and cable terminal joints is of great significance for ensuring the normal operation of the power system, improving operational reliability and automation.

In substations, plugs are generally used to connect busbars, interruptores de isolamento, aparelhagem de alta tensão, disjuntores, e cabos. During the long-term operation of these primary equipment, the wire clamps and connecting plugs are prone to overheating due to poor manufacturing, transporte, instalação, e envelhecimento, which can cause excessive contact resistance. If the temperature of these heating parts cannot be monitored and timely maintenance is not carried out, it may ultimately lead to high contact temperature rise and even cause equipment fire accidents. Nos últimos anos, there have been incidents of blade cutting and cable head overheating in many power plants and substations, resulting in fires, large-scale power outages, e até mesmo “fire incidents”. Once a power outage occurs due to a malfunction, it first brings inconvenience to the people’s lives and interferes with the normal production and operation of the enterprise; Em segundo lugar, it causes significant losses to the power supply company; Além disso, there are numerous tap joints for switchgear, barramentos, and cables in the substation, forming a mesh and enclosed structure, making it very difficult to identify potential faults and wasting a lot of manpower and resources.

As características funcionais do fluorescent fiber optic temperature measurement system for power equipment:

① The sistema de medição de temperatura de fibra óptica can be practically applied in switchgear and ring main unit, e o método de implementação de controle de temperatura tem uma estrutura razoável;

② O sistema de medição de temperatura de fibra óptica fluorescente é fácil de instalar e tem um volume apropriado;

③ Medição de temperatura de fibra óptica tem boa relação custo-benefício e atende aos requisitos de precisão para uso;

④ O sistema de medição de temperatura de fibra óptica tem forte capacidade anti-interferência e pode operar de forma estável e confiável;

⑤ O dispositivo de medição de temperatura de fibra óptica possui temperatura de alarme de temperatura personalizável e funções como alarme de temperatura excessiva;

⑥ Exibição em tempo real da temperatura de monitoramento multicanal;

⑦ Realize a exibição do tempo de ação de superaquecimento, facilitando a recuperação do histórico de temperatura excessiva no ambiente operacional;

⑧ Adapte-se à medição de temperatura em vários ambientes agressivos.