2025 Kudin Daidaito a Tabbacin Yawan Lafiya a Faduwa na Gwargwadon Kirkiro: Tattalin Zimma da Karmar Gaskiya

1. Mafiyan da Dukkantun Ma'adani na Noma Temperature Online
1.1 Tsohon Mai Tsara don Noma Temperature na Winding Dry-Type Transformer
Ana amfani da platinum resistance sensors a tsohon mai tsara. Saboda ba su da insulation, ya kamata maimakon sensor daga tsohon mai tsara a lokacin da ake yi voltage withstand tests. Amma, overvoltage a lokacin da ake yi operation yana kawo rage tsohon mai tsara. Kuma lead wires na sensor ba zan iya tabbatar da 350°C high temperature wanda an bukata don thermal da dynamic stability a lokacin da short circuit na secondary-side na dry-type transformers, wanda yake hada zuwa burnout na sensor.

1.2 Pressure-Type Resistance Thermometer don Noma Temperature Oil Power Transformer
Wannan thermometer ana amfani da platinum resistance sensor. Saboda low resistance value na farko, yana kasance da lead wire resistance. Yanzu, contact resistance na multiple terminal connections a leads yana canzawa saboda oxidation, loosening, ko maintenance, kuma wannan canzawa ba zan iya duba a cikin noma readings. Wannan yana haɗa da mafi yanayi daga displayed to actual oil temperatures, wanda yake kawo rage reliability na noma readings. Da kuma haka, ba ake da multi-point oil temperature monitoring, wanda yake buƙace buƙatun products masu inganci.

2. Noma Temperature Online Mai Inganci don Equipment Power da Makoni Aiki
2.1 Medium-Voltage Switchgear
Babban equipment da ya danganta, akwai majority da medium-voltage switchgear na structures masu enclosure da anti-misoperation interlocks. A lokacin da ake yi operation, ba za a iko doors ko covers wanda ke rage infrared radiation don infrared inspections. Internal conductive joints da connectors sun zama da increase contact resistance saboda electrical wear, mechanical operations, da short-circuit electromagnetic forces wanda ke rage mechanical vibration, wanda yake kawo rage temperature rise da accelerated contact surface oxidation, wanda zai iya haɗa zuwa major equipment failures. Abubuwan da suka faru a switchgear sun hada zuwa withdrawable switch contacts da cable connection points a incoming da outgoing lines.

2.2 Medium-Voltage Windings of Dry-Type Transformers
Daga baya na power equipment, 110kV high-voltage dry-type power transformers da specialized dry-type transformers for railway systems suka faru. Secondary side su ne rated a 6–10kV, kuma wasu special dry-type transformers suka da secondary voltages da suka fi 660V. Reliable online monitoring products for secondary winding temperatures of these transformers ba suka shahara.

2.3 Low-Voltage Outlet Terminals of Pole-Mounted Transformers (Distribution Transformers)
Distribution transformers ana kan outdoor environments, kuma secondary side su ba da protection, wanda yake haɗa zuwa burnout incidents. Statistics ta bayarwa cewa overheating a outlet terminals shine primary cause. Article 5.1.4 of the "Power Transformer Operation Regulations" ta bayar da routine inspections don checking for signs of heating a lead connections, cables, da busbars. Traditionally, visual inspection, water dripping, ko observing oil leakage from bushings ana amfani don judgment. Amma, saboda workload na inspections, waɗannan checks suna jin gaba, wanda yake kawo rage sudden transformer failures. Idan transformer yana samu severe three-phase load imbalance, neutral current mai yawa zai haɗa zuwa undersized neutral outlet terminal. Idan connection ce yana da matsaloli, yana iya overheat da kuma burn out, wanda zai lada numerous household appliances. Saboda haka, online temperature monitoring a waɗannan points yana buƙace.

2.4 Prefabricated Substations (Containerized Substations)

Domestically manufactured prefabricated substations su integarte related equipment within fully enclosed enclosures, amma most su ba da integrated design da testing. Saboda enclosure—sometimes multiple layers—equipment heat dissipation yana kasance. Kuma extent of equipment derating ba zan iya duba reasonable, wanda zai iya kawo rage internal equipment to overheat. State Power Corporation ta bayar a cikin tender documents na prefabricated substation cewa operating temperature of all equipment, including transformers and high/low-voltage apparatus, ba zan iya fi maximum allowable temperatures. Wannan yana buƙace online temperature monitoring. Currently, prefabricated substations generally only monitor transformer oil temperature and automatically switch on/off ventilation fans based on temperature changes.Due to lack of matching products, temperature monitoring ba suka shahara as required for transformer outlet terminals, low-voltage switches, and high-voltage switch incoming/outgoing terminals.

3.Tsarin Biyu Don Noma Temperature Online

Yana da tsarin biyu na main don noma temperature online: non-contact infrared radiation da contact-type measurement using thermal sensors. Non-contact infrared sensors su kasance da environmental factors like humidity, atmospheric pressure, da obstructions; idan infrared radiation yana rage, accurate measurement ba zan iya shahara, wanda yake kawo rage application su. Amma, contact-type sensors su direct attach to measurement point, su ka kasance da environmental factors, kuma suke enable accurate da rapid temperature detection.

Mafiyan da Dukkantun Contact Solutions:
Idan thermocouples su amfani a cikin sensors, cold-junction compensation yana buƙace saboda reference (cold) junction ba zan iya duba 0°C, musamman a lokacin da ake yi measurement a room temperature. Idan measuring (hot) da reference junctions su karfi, compensating cables da suka buƙace.

Idan fiber-optic sensors su amfani—including a transmitter, receiver, connectors, da optical fiber—installation da routing na fiber yana present significant challenges. Fiber-based signal transmission ba zan iya shahara complete electrical isolation between high da low potential sides. Idan transmitter yana install a high-voltage side, problem of insulation to ground ba zan iya shahara.

Using resistive sensors for direct contact measurement with wired signal transmission on the high-potential side, combined with air-gap insulation and infrared-optical conversion to transmit temperature signals, is a viable solution. Amma, since the infrared emitter and receiver are exposed, dust and contamination accumulate over long-term operation, gradually degrading signal reliability and measurement accuracy—another difficult issue to resolve. Additionally, professional on-site installation and commissioning are required, resulting in suboptimal user convenience.

4.Muhimmancin Tasirin Teknologi na Devices Noma Temperature Online

(1) A low-voltage systems, muhimmin tasiri shine solving the problem of thermal conduction while maintaining electrical insulation for the temperature sensor. A high-voltage systems, it is essential to prevent high voltage from entering the low-voltage side. Since the sensing element is located at the high-voltage end and the monitoring/processing unit is on the low-voltage side, the core technical issue is achieving reliable electrical isolation between the high-voltage and low-voltage systems.

(2) The temperature sensor (including its leads) must meet requirements for stability and heat resistance under high-temperature conditions. It must not only withstand abnormal overheating but also survive the short-term high temperatures generated by dynamic and thermal stress during short-circuit currents without damage.

(3) Accurate temperature measurement requires a method that eliminates the need for compensation, ensuring measurement precision without additional correction.