How to measure temperature in the power grid-INNO

Why does the power grid need temperature measurement
en el sistema de energía, power grid equipment is an indispensable part. To ensure the normal operation of power grid equipment, it is necessary for power grid monitoring personnel to measure and record the real-time status of the power grid. Según las estadísticas, various electrical equipment faults in transmission lines are closely related to their heating. Actualmente, the intelligent temperature measurement devices for power grid equipment mostly use external power sources. The intelligent temperature measurement devices for power grid equipment are connected to the power supply through lines. Sin embargo, las líneas envejecerán con el tiempo, and monitoring personnel need to pay attention to the use of external circuits to prevent the aging of the intelligent temperature measurement devices for power grid equipment from causing power outages and inability to work. Además, La gran altura de instalación de la red eléctrica plantea ciertas dificultades para la instalación de dispositivos inteligentes de medición de temperatura para equipos de la red eléctrica.. Debido al rango de medición limitado, multiple sets of devices are required to cooperate with measurement to ensure the accuracy of measurement data. A veces, drones are even needed to assist in temperature measurement, lo que aumenta la dificultad y el coste de la medición de la temperatura.

Disadvantages of infrared temperature measurement in switchgear

According to the requirements of the State Grid Corporation of China’s distribution network maintenance system, the infrared temperature measurement cycle for switchgear is one quarter, and it is difficult to detect each cable head in place during the first quarter. Actualmente, infrared temperature measurement is mainly used for cable terminal heads. Due to the large number of distribution network cables and limited manpower. And a large number of them have a high load during off hours, so the temperature at the maximum load is not detected properly. Por lo tanto, there is an urgent need to improve the current indoor cable terminal temperature measurement method, and develop an economical, manual free, or less manual intelligent temperature measurement method to achieve real-time monitoring of cable terminal heads and full coverage of temperature measurement points, ensuring the real-time, authenticity, and effectiveness of temperature measurement data; Reduce the on-site temperature measurement workload of frontline teams, reduce personnel workload and production costs, and improve work efficiency.

Traditional temperature measurement methods for power grids

1. Conventional temperature measurement methods.

La desventaja de utilizar dispositivos convencionales como termopares., termistores, and semiconductor temperature sensors to detect the temperature of power grid contacts is that they cannot be wireless and passive, require metal wires to transmit signals, cannot work independently and wirelessly, y el rendimiento del aislamiento no se puede garantizar.

2. Método de medición de temperatura por infrarrojos.

Infrared temperature measurement is a non-contact temperature measurement method, which is widely used in temperature detection of equipment such as substation sleeves, lightning arresters, y barras colectoras. Su desventaja es que la precisión de la obtención indirecta de datos de temperatura a través de espectros infrarrojos no puede cumplir con los requisitos.. El nivel de tecnología de reconocimiento por computadora para espectros infrarrojos no puede reemplazar el reconocimiento manual., y el grado de automatización no es alto, which is not widely used.

3. Medición de temperatura inalámbrica método.

The wireless temperature measurement device is used to detect the temperature of the power grid junction. The power supply of the module is often a current induction power supply that obtains energy from the power line (si se utiliza la energía de la batería, no sólo es necesario reemplazarlo periódicamente, pero la batería también es propensa a falsas alarmas en ambientes de alta temperatura y estados de alimentación de la batería., afectando en gran medida la precisión del monitoreo). The magnitude of the energy obtained by the power supply changes with the load of the power line, and the amplitude of the change is large. Por lo tanto, the module often experiences insufficient power supply. En respuesta a este problema, some people have proposed using batteries, reducing the power consumption of the temperature measurement device, y otros métodos. This method has problems such as the need to replace the battery regularly after consumption is complete, and it also brings about small wireless transmission power and electromagnetic interference from the surrounding environment, lo que provoca errores en la transmisión de datos de medición de temperatura. Replacing the device battery requires a high-voltage switch. The cabinet stops supplying power, Unable to meet the working requirements for continuous operation of high-voltage switchgear.

Fiber optic temperature measurement in power grid

The most suitable temperature measurement method for common high-voltage equipment such as switchgear, disyuntores, and transformers is fluorescence fiber optic temperature measurement. Comparado con los sensores tradicionales, fiber optic sensors have obvious advantages. Fiber optic sensors use light as the carrier of sensitive information and fiber optic as the medium for transmitting sensitive information, which has the characteristics of fiber optic and optical measurement and a series of unique advantages. Good electrical insulation performance, fuerte resistencia a la interferencia electromagnética, non invasiveness, alta sensibilidad, easy to achieve remote monitoring of the measured signal, resistencia a la corrosión, a prueba de explosiones, flexible optical path, and easy to connect with computers.

FJINNO provides fluorescent sistemas de medición de temperatura de fibra óptica, which are widely used in temperature measurement of power equipment, transformadores, and hazardous flammable and explosive materials in the petrochemical industry. We welcome agency cooperation and offer reasonable prices.