AIS VT/PT Dual-Enhanced Precision and Insulation Solution

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:

1. Precision Drift:

• Dielectric constant variation due to humidity fluctuations and contaminant accumulation, causing secondary-side output error exceeding limits (>Class 0.5).

2. Insulation Failure Risk:

• Surface flashover induced by salt mist/chemical pollutants, reducing breakdown voltage by >30%.

II. Innovative Technical Solutions

1. 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%.

2. 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.

3. 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)

IV. Technical Advantages Summary

1. Extreme Condition Resilience:

• Certified for C5-M corrosion resistance (ISO 12944), withstands pH=2~12 chemical environments.

2. Lifecycle Cost Optimization:

• Maintenance cycle extended to 10 years; O&M costs reduced by 60%.

3. 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