UHV Grid Metering Solution: 1000kV VT System Based on Ultra-High Insulation Stability Soluzioni ya Uchanganuzi wa Mtandao wa UHV: Mfumo wa 1000kV VT kwa Ishara ya Insulation Iliyoshinda Sana

Suluhisho la Metering ya Mipango ya UHV: Mfumo wa VT wa 1000kV wa Kiwango Cha Juu cha Insulation​

Katika mitandao ya UHV (Ultra-High Voltage), kiwango cha juu cha umeme (mfano, 1000kV) huchukua maagizo mengi sana kwa ufanisi wa insulation na uhakikisho wa metering. Transformers za voltage (VTs) za kawaida huwa ni wazi kusababisha upungufu wa insulation, ukosefu wa partial discharge, na athari za thermal drift chini ya kiwango cha juu cha umeme, kuleta msongamano wa metering au hasara la vifaa. Suluhisho hili linatafsiri matatizo muhimu ya "insulation stability ya kiwango cha juu," kunijua suluhisho la transformer jipya (VT) linalowezekana kwa mfumo wa 1000kV ili kuhakikisha kuwa data muhimu inapatakiwa kwa usahihi na uhakika.

​1. Chanzo cha Teknolojia: Kuwasilisha Insulation Stability ya Kiwango Cha Juu​

Insulation stability ya 1000kV ni msingi wa uhakikisho wa metering. Suluhisho hili lina tumia teknolojia nyingi zinazofanya kazi pamoja kujenga ukuta mzuri wa insulation:

• ​Gas-Solid Composite Insulation:​​ Inatumia SF6 gas yenye nguvu ya insulation inayozidi kumaliza chumba kilicho funga, kufanya iwe isiyotumaini kutokana na mazingira; layer ya nje ya silicon rubber composite insulator housing inatoa ubora wa protection wa mbili dhidi ya hali mbaya za hewa na contamination.
• ​Uchanganuzi wa Joto Smart:​​ Ina Pt100 temperature sensors zinazoweza kubaki kwenye chumba kwa lengo la kukagua mazingira ya SF6 gas, kuzuia degradation au liquefaction risks zinazotokana na ongezeko la moto.
• ​Step-Graded Voltage Equalization Structure:​​ Teknolojia inayofanikiwa ya 4-stage series capacitive voltage division technology inaweza kugawa umeme wa kiwango cha juu kwa kila kitu, kupunguza distortion ya electric field na kuboresha uniformity ya voltage distribution na insulation reliability.

​2. Muundo wa Msingi: Msingi wa Metering sahihi​

• ​Vifaa vya Msingi:​​ 1000kV SF6 Gas-Insulated Voltage Transformer
• ​Structure ya Voltage Division:​​ 4-stage series capacitive voltage divider (equalization ya voltage inayofaa, kupunguza stress ya insulation)
• ​Mfumo wa Insulation:​​ Ni full of high-purity SF6 gas + External silicon rubber composite insulator housing (Dual Protection)
• ​Uchanganuzi wa Hali:​​ Pt100 temperature sensors zinazoweza kubaki kwenye chumba (real-time sensing ya mazingira ya ndani)

​3. Faidesi Zenye Ubora: Performance Zinazozidi Kiwango cha Industri​

• ​Usahihi wa Kiwango Cha Juu:​​ Inafanikiwa accuracy class ya 0.1, ikihifadhiwa katika 80%-120% Un, ifuatayo vifaa vya kawaida (kiwango cha 0.2 au 0.5). Inatoa data inayoweza kubaki kwa energy settlement, dispatch, na control.
• ​Loss Ndogo:​​ Dielectric loss value < 0.05% (katika rated voltage), kupunguza self-consumption na operational heating, kuboresha lifespan.
• ​Insulation Iliyoboreshwa:​​ Partial discharge level ≤3pC (Test condition: 1.2Um/√3), chini ya miundombinu ya taifa (kiwango cha 5-10pC), kupunguza risasi za aging na breakdown za insulation.
• ​Stability ya Mrefu:​​ Design nzuri wa divider structure inahakikisha linearity na accuracy katika 80%-120% Un, kubadilisha fluctuations za grid load.

​4. Mechanism ya Safety ya Fault Proactive: Emergency Cut-off wa Sekunde 0.5​

• ​Dual Redundant Pressure Relief:​​ Ina dual explosion-proof valves. Ikiwa pressure ndani yakichukua ongezeko (mfano, kutokana na fault au overheating kusababisha gasification ya SF6), valves zinachukua interlinked pressure release channels kuzuia rupture ya enclosure.
• ​Protection Interlocking ya Millisecond-Level:​​ Signals za pressure surge zinachukua relay protection device, kurejesha faida ya faulted line ndani ya sekunde 0.5, kupunguza scope ya fault na kuhakikisha safety na stable operation ya main grid.