Pamantayan ng Teknolohiya para sa Pagpapahusay ng GIS Voltage Transformer: Pagsasalamin ng Teknolohiya na Nagpapabuti ng Pamamaraan ng Insulasyon at Katumpakan ng Pagsukat
Ⅰ. Pagsusuri ng mga Teknikal na Hamon
Ang tradisyonal na GIS (Gas-Insulated Switchgear) voltage transformers ay nakakaharap sa dalawang pangunahing problema sa komplikadong grid environment:
- Hindi Sapat na Kahandalan ng Insulation System
- Ang impurities ng SF₆ gas (moisture, decomposition byproducts) ay nagdudulot ng surface discharges, na nagiging sanhi ng pagka-degrade ng insulation.
- Ang pagbabago ng temperatura (-40°C hanggang +80°C) ay nagdudulot ng pagbabago ng density ng gas, na nagsisimula ng partial discharge inception voltage (PDIV).
- Pagka-degrade ng Accuracy ng Pagsukat
- Ang drift ng permeability ng core dahil sa temperatura (typical drift: 0.05%/K).
- Ang pagbabago ng frequency ng sistema (±2Hz) ay nagdudulot ng ratio/phase angle errors na lumampas sa limitasyon.
Ang data mula sa field ay nagpapakita: Ang mga konbensyonal na device ay maaaring ipakita ang measurement errors hanggang sa class 0.5 sa ilalim ng ekstremong kondisyon, na may taunang failure rate na lumampas sa 3%.
II. Pangunahing Teknikal na Solusyon para sa Optimization
(1) Pag-upgrade ng Nano-Composite Insulation System
|
Teknikal na Modulo |
Puntos ng Implementasyon |
|
Nano Insulation Material |
Al₂O₃-SiO₂ nano-composite coating (particle size: 50-80nm) ginagamit upang palakasin ang epoxy resin surface tracking resistance ng ≥35%. |
|
Hybrid Gas Optimization |
SF₆/N₂ (80:20) mixture filling, binababa ang liquefaction temperature sa -45°C at binabawasan ang risk ng leakage ng 40%. |
|
Enhanced Sealing Design |
Metal bellows dual-seal structure + laser welding process, leakage rate ≤ 0.1%/year (IEC 62271-203 standard). |
Teknikal na Validation: Nangangalampa sa 150kV power-frequency withstand voltage test at 1000 thermal cycles; partial discharge level ≤3pC.
(2) Full-Condition Digital Compensation System
A[Sensor ng Temperatura] --> B(MCU Compensation Processor)
C[Module ng Frequency Monitoring] --> B(MCU Compensation Processor)
D[AD Sampling Circuit] --> E(Algorithm ng Error Compensation)
B(MCU Compensation Processor) --> E(Algorithm ng Error Compensation)
E(Algorithm ng Error Compensation) --> F[Class 0.2 Standard Output]
Pagtataguyod ng Core Algorithm:
ΔUcomp=k1⋅ΔT+k2⋅Δf+k3⋅e−αt\Delta U_{comp} = k_1 \cdot \Delta T + k_2 \cdot \Delta f + k_3 \cdot e^{-\alpha t}ΔUcomp=k1⋅ΔT+k2⋅Δf+k3⋅e−αt
Kung saan:
- k1k_1k1 = 0.0035/°C (Temperature Compensation Coefficient)
- k2k_2k2 = 0.01/Hz (Frequency Compensation Coefficient)
- k3k_3k3 = Aging Attenuation Compensation Factor
Real-time correction response time <20ms; operational temperature range extended to -40°C ~ +85°C.
III. Quantitative Benefit Forecast
|
Metric Item |
Conventional Solution |
This Technical Solution |
Optimization Magnitude |
|
Measurement Accuracy Class |
Class 0.5 |
Class 0.2 |
↑150% |
|
PD Inception Voltage (PDIV) |
30kV |
≥50kV |
↑66.7% |
|
Design Life |
25 years |
>32 years |
↑30% |
|
Annual Inspection Frequency |
2 times/year |
1 time/year |
↓50% |
|
Lifecycle O&M Cost |
$180k/unit |
$95k/unit |
↓47.2% |
IV. Resulta ng Teknikal na Validation
- Type Test Data (3rd Party Certified):
- Temperature Cycling Test: Matapos ang 100 cycles (-40°C ~ +85°C), ang ratio error change < ±0.05%.
- Long-Term Stability: Matapos ang 2000h accelerated aging test, ang error shift ≤ 0.05 class.
- Demonstration Project (750kV Substation):
Walang record ng pagkakasira matapos ang 18 months ng operasyon. Maximum measured error: 0.12% (outperforming class 0.2 requirements).
V. Engineering Implementation Path
- Equipment Customization Cycle:
- Solution Design (15 days) → Prototype Manufacturing (30 days) → Type Testing (45 days)
- Field Upgrade Solution:
- Compatible with existing GIS gas chamber interfaces (Flange standard IEC 60517).
- Outage replacement time ≤ 8 hours.
- Smart O&M Support:
- Built-in H₂S/SO₂ micro-environment sensors.
- Supports IEC 61850-9-2LE digital output.
