
Core Objective: Precision Improvement and Insulation Reinforcement
Applicable Scenarios: Coastal power plants, chemical plants, high-humidity/high-pollution harsh environments
I. Technical Pain Points Analysis
Traditional AIS-VT faces two core issues in complex environments:
- Precision Drift:
- Dielectric constant variation due to humidity fluctuations and contaminant accumulation, causing secondary-side output error exceeding limits (>Class 0.5).
- Insulation Failure Risk:
- Surface flashover induced by salt mist/chemical pollutants, reducing breakdown voltage by >30%.
II. Innovative Technical Solutions
- Insulation System Upgrade: Nano-Composite Silicone Rubber Bushings
- Material Properties:
- Hydrophobicity lifespan ≥25 years (IEC 62073 accelerated aging verified), suppressing moisture penetration.
- Pollution flashover withstand voltage ↑40% (≥145 kV/m under salt fog test).
- Structural Optimization:
- Angled shed design + multi-level creepage extension, improving self-cleaning efficiency by 50%.
- Dynamic Precision Compensation System
- Temperature/Humidity Sensors: Embedded high-precision sensors (±0.5% RH/±0.1℃) for real-time environmental monitoring.
- AI Compensation Algorithm: Maintains stable 0.1-class accuracy (IEC 60044-2024 Class 0.1) across all operating conditions.
- Anti-Ferroresonance Magnetic Circuit Design
- RFC Damping Circuit: Parallel nonlinear resistors (10kΩ~1MΩ adaptive adjustment) suppress resonant overvoltage.
- Zero-Sequence Flux Cancellation: Symmetric dual-magnetic circuit structure reduces harmonic distortion to <0.2%.
III. Performance Validation (IEC Standard Tests)
Test Item
|
Traditional Solution
|
This Solution
|
Improvement
|
Power Frequency Withstand
|
95 kV (dry)/70 kV (wet)
|
130 kV (dry)/115 kV (wet)
|
+37%
|
Pollution Flashover (E5 class)
|
28 kV
|
40 kV
|
+43%
|
Annual Failure Rate
|
>1.5%
|
0.2%
|
↓87%
|
Temp. Cycling Error
|
±0.5%
|
±0.1%
|
5× higher precision
|
IV. Technical Advantages Summary
- Extreme Condition Resilience:
- Certified for C5-M corrosion resistance (ISO 12944), withstands pH=2~12 chemical environments.
- Lifecycle Cost Optimization:
- Maintenance cycle extended to 10 years; O&M costs reduced by 60%.
- Smart Expansion Capability:
- Supports IEC 61850 communication interface for real-time data upload to smart grids.
V. Application Cases
- Coastal Wind Farm (avg. humidity 85%):
- After replacing 32 traditional AIS-VTs: zero annual flashover faults; metering error stabilized at Class 0.1.
- Chlor-Alkali Chemical Plant (chlorine corrosion):
- Zero insulation degradation after 18 months; bushing hydrophobicity maintained HA-grade (highest class).
Compliance Standards: IEC 60044-2024 / IEEE C57.13 / GB/T 20840.7-202X