UHV Grid Metering Solution: 1000kV VT System Based on Ultra-High Insulation Stability Soluciyan UHV Grid na Maimaitaici: 1000kV VT System a Jamiyar Yawan Dukkantar Zafi Daidai

IEE-Business UHV Grid Metering Solution: 1000kV VT System Based on Ultra-High Insulation Stability​

A cikin grids da Ultra-High Voltage (UHV), yadda tsarin karamin lalace (misali 1000kV) na iya haɗaƙi abubuwa masu sauki ga hanyar insulanta da tattalin adadin devices. Voltage transformers (VTs) na gaba suka shafi ɗaya daga insulanta ta bangare, fitaccen fasaha da tashin karshen jiki, wanda ke magana zuwa tattalin adadin ko kuma tukuna ɗaya daga abubuwan. Wannan bincike na neman maimaita mai sarrafa "insulanta da inganci a cikin tsari mai yawa," wanda ya bayyana amsa Voltage Transformer (VT) na musamman don systems da 1000kV don tabbatar da samun adadin da tattalin parametere da muhimmanci.

​1. Yakin Fanni: Tabbatar da Insulanta da Inganci a Cikin Tsari Mai Yawa​

Insulanta mai yawa a 1000kV shine matsayin malamiyar tattalin adadin. Wannan bincike na amfani da teknologiyoyi da suka shiga fanni a kan yin amsa mai yawa:

• ​Gas-Solid Composite Insulanta:​​ Ya yi amfani da gas da insulanta mai yawa ​SF6​ don jiya chamber mai kwallaye, tare da ake faɗa daga al'amuran; sabon layer da ke kusa ​silicon rubber composite insulator housing​ ya ba aiki biyu a kan tsafta da zama a cikin harsuna da talauci.
• ​Intelligent Temperature Monitoring:​​ Da ake samun ​Pt100 temperature sensors​ a cikin chamber don tattalin halayen SF6 gas, tare da ake buƙata insulanta da tara da tukuna ɗaya daga tasa.
• ​Step-Graded Voltage Equalization Structure:​​ Teknologi mai yawa na 4-stage series capacitive voltage division technology ​​ ya ba aiki da tattalin adadin tsari mai yawa layer-by-layer, tare da ake buƙata electric field distortion da tuka da tattalin adadin da insulanta mai yawa.

​2. Core Configuration: Foundation for Precise Metering​

• ​Core Equipment:​​ 1000kV SF6 Gas-Insulated Voltage Transformer
• ​Voltage Division Structure:​​ 4-stage series capacitive voltage divider (efficient voltage equalization, reducing single-stage insulation stress)
• ​Insulation System:​​ Internally filled with high-purity SF6 gas + External silicon rubber composite insulator housing (Dual Protection)
• ​Condition Monitoring:​​ Embedded Pt100 temperature sensors (real-time sensing of internal environment)

​3. Core Advantages: Performance Significantly Exceeding Industry Standards​

• ​Ultra-High Accuracy:​​ Ya samun accuracy class da take 0.1, wanda ya ci gaba da 80%-120% of the rated voltage (Un), wanda ya fiye waɗanda ake amfani da su a gaba (typically class 0.2 or 0.5). Ya ba aiki da data da yake da amana don energy settlement, dispatch, and control.
• ​Exceptionally Low Loss:​​ Dielectric loss value <0.05% (at rated voltage), wanda ya ci gaba da self-consumption da tashin karshen jiki, wanda ya ci gaba da tsawo.
• ​Superior Insulation:​​ Partial discharge level ≤3pC (Test condition: 1.2Um/√3), wanda ya ci gaba da national standard requirements (typically 5-10pC), wanda ya ba aiki da risks of insulation aging and breakdown caused by partial discharges.
• ​Wide-Range Stability:​​ Excellent divider structure design ensures linearity and accuracy within the 80%-120% Un range, adapting to grid load fluctuations.

​4. Proactive Fault Safety Mechanism: 0.5-Second Emergency Cut-off​

• ​Dual Redundant Pressure Relief:​​ Features dual explosion-proof valves. If internal pressure abnormally surges (e.g., due to severe fault or overheating causing SF6 gasification), the valves trigger interlinked pressure release channels to prevent enclosure rupture.
• ​Millisecond-Level Protection Interlocking:​​ Pressure surge signals trigger the relay protection device, reliably isolating the faulted line within 0.5 seconds, minimizing the fault scope and ensuring the safety and stable operation of the main grid.