Elektronikong Current Transformer (ECT) High-Precision Solution
I. Pain Points & Challenges
Ang mga tradisyonal nga electromagnetic current transformers (CTs) adunay mga inherent nga limitasyon sama sa magnetic saturation, narrow bandwidth, ug dako kaayo nga sukal, kung sa wala mahimong pahimulos sa mga demand sa smart grid alang sa high-precision ug wide-dynamic-range measurement. Lahi na sa pagkakaroon og large current surges o complex harmonic operating conditions, ang accuracy kasagaran mobati, kompromiso sa safety ug economic operation sa power systems.
II. Core Technological Breakthrough: Multi-Dimensional Accuracy Enhancement Architecture
Kini nga solusyon nagpadayon sa ±0.1% accuracy class (Class 0.1) sa tanang operating conditions, gisugdan sa IEC 61869 standard requirements, pinaagi sa pag-integrate sa sensor technology innovations, intelligent compensation algorithms, ug optimized digital signal processing.
Key Technological Approaches:
- Low-Noise Sensing Layer Innovation
- High-Linearity Air-Core Coil Design: Nagamit og precision winding techniques ug nanocrystalline magnetic cores aron mapababa ang high-frequency eddy current losses, sigurado nga phase error < 0.1° sa 10Hz ~ 5kHz frequency band.
- Micro-Current Self-Powering Technology: Inovatibo nga self-powered circuit design (minimum starting current 0.5A) nagelimina sa external power supply interference, naghimo sa mas accurate ang low-current measurement.
- Dynamic Temperature Compensation System
- Multi-Sensor Fusion Calibration: Nagintegre sa temperature/vibration/electric field sensors aron makabuo og real-time environmental parameter matrix, dynamic correction sa drift errors pinaagi sa AI compensation model (LSTM neural network).
- Anti-Interference Digital Processing Chain
|
Module |
Technical Solution |
Accuracy Contribution |
|
ADC Sampling |
24-bit Σ-Δ ADC + Synchronous Clock Distribution |
Nagbawas sa quantization noise ngadto sa 60% |
|
Digital Filtering |
Adaptive FIR Filter Bank |
Harmonic Rejection Ratio > 80dB |
|
Data Transmission |
Triple-Redundant Fiber Channel + CRC32 Checksum |
Bit Error Rate < 10⁻¹² |
III. Accuracy Verification Comparison (Typical Conditions)
|
Test Condition |
Traditional CT Error |
Proposed ECT Solution Error |
Improvement Factor |
|
Rated Current (50Hz) |
±0.5% |
±0.05% |
10x |
|
20% Overload (30% Harmonics) |
±2.1% |
±0.12% |
17.5x |
|
Extreme Low Temp (-40°C) |
±1.8% |
±0.15% |
12x |
IV. Application Value
- Grid Security: Ang fault current measurement accuracy gibati sa 99.9%, sigurado nga relay protection correct operation rate > 99.99%.
- Energy Efficiency Management: Ang wide-band harmonic measurement error < 0.5%, naghimo sa precise ang power quality analysis.
- Intelligent Expansion: Natively supports IEE-Business 61850-9-2LE protocol, naghimo sa seamless integration sa digital substation systems.
