sensor ya joto ya nyuzi zisizo na waya Mpango wa vitendo wa kipimo cha joto cha anwani za swichi zenye voltage ya juu na baa za basi.

With the progress of society, the voltage level of the power grid is constantly improving, and the requirements for the safety and reliability of power supply for the use of electrical equipment are also increasing. With the increase of electricity demand, it will lead to an increase in power supply load and aging of power supply equipment. Wakati wa operesheni ya muda mrefu, various electrical equipment in substations are prone to overheating due to excessive contact resistance or insulation aging. This potential hazard directly affects the normal operation of electrical equipment, na katika kesi kali, it can even cause major accidents, leading to personal injury and economic losses.

High voltage isolation switches are the most widely used and widely used high-voltage switchgear equipment in power grid operation. Their existence ensures the personal safety of maintenance personnel. They operate in high voltage and high current environments, and the temperature rise of their contacts directly affects the reliability of power supply. Hata hivyo, during the operation of the power grid, factors such as unclean contact surfaces of electrical equipment, burning of contacts, and mechanical deformation and looseness can all lead to deterioration of contact conditions, kuongezeka kwa upinzani wa mawasiliano, causing higher temperature at the contact points, accelerating oxidation of the contact surfaces, and ultimately causing local welding or arc formation at loose contact deformation points, ultimately leading to major electrical accidents such as damage to electrical equipment and even power outages. Kwa hiyo, real-time online monitoring of contact temperature is of great significance in the operation of electrical equipment in substations. Aidha, for operating electrical equipment, temperature is a very important parameter, which can directly determine whether an electrical equipment is operating normally through temperature information. Katika mfumo wa nguvu, high-voltage switchgear and cable branch boxes in power plants and substations are important equipment to ensure stable and reliable power supply.

The existing electrical equipment has increasingly high requirements for power supply reliability. Under high voltage and high current conditions, the working reliability of high-voltage switchgear is closely related to the temperature rise of isolation switch contacts. Wakati wa uendeshaji wa gridi ya nguvu, vibration ya mitambo, wasiliana na mmomonyoko wa udongo, na sababu zingine zinaweza kuzidisha hali ya mawasiliano, kuongeza upinzani wa mawasiliano, kusababisha ongezeko la joto la mahali pa kuwasiliana, kuzidisha oxidation ya uso wa mawasiliano, na kusababisha kulehemu kwa ndani au kutokwa kwa arc kwenye sehemu zisizo huru za mawasiliano, hatimaye kusababisha uharibifu wa vifaa vya umeme, kukatika kwa umeme, au ajali kubwa kama vile moto. Aina hii ya ajali ya kosa la kuzidisha joto sio tu kwa sababu ya shida ya ubora wa swichi ya baraza la mawaziri lenye voltage kubwa yenyewe., lakini muhimu zaidi, kutokana na ukosefu wa mbinu za ufuatiliaji wa ufanisi wa kupanda kwa joto la mawasiliano ya kubadili kutengwa kwa sasa. One of the reasons is that there is exposed high voltage inside the cabinet, and conventional temperature measurement methods cannot be used; Pili, the online real-time temperature measurement system for switchgear currently used in the power system is characterized by cumbersome installation, heavy wiring, inconvenient maintenance, and high cost. Factors such as aging of contacts can easily lead to an increase in contact resistance, which may result in serious accidents such as excessive heating or even burning of the contacts.

The traditional temperature measurement methods for switchgear include
(1) Using an infrared thermometer. The infrared thermometer is equipped with a data interface, which can transmit real-time temperature data to the background for display and alarm, and can also be indicated locally. The advantage of this scheme is high measurement accuracy; The disadvantage is that the price is relatively expensive, requiring power cord pulling, close range visual installation, and power outage installation.
(2) Manual inspection is adopted. The manual inspection method for temperature measurement of switchgear has many drawbacks, such as the inability to accurately measure temperature and the consumption of a large amount of manpower and material resources, which is very costly,
(3) Using a wireless thermometer. A low-power temperature measuring instrument developed in China in recent years using low-power microcontroller, sensor ya joto, and wireless communication chip technology, with a built-in battery that can operate for 2-3 miaka. The advantage of this plan is its low price; The disadvantage is that the battery has a short service life, gharama kubwa za matengenezo, and requires power outage installation and disassembly.

The most advanced temperature measurement solution now is to use fluorescent fiber optic temperature measurement in switchgear. The main technical advantages of fluorescent fiber optic temperature sensors and temperature measurement devices are:

Suitable for strong electromagnetic, masafa ya redio, and microwave temperature measurement environments;

The probe has good interchangeability and repeatability;

Temperature measurement range light, usahihi wa kipimo cha juu;

Excellent reliability and stability;

Simple structure and long service life;

Sensor ya joto ya fiber optic, Mfumo wa ufuatiliaji wa akili, Kusambazwa fiber optic mtengenezaji nchini China