Design study of on-line monitoring system for power equipment operation status
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26 mar 2025
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Pubblicato online: 26 mar 2025
Ricevuto: 16 nov 2024
Accettato: 28 feb 2025
DOI: https://doi.org/10.2478/amns-2025-0802
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© 2025 Zichen Wu et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
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Figure 5.
Test power transformer performance parameter configuration
| Parameter name | Value/Description | Parameter name | Value/Description |
|---|---|---|---|
| Rated capacity | 15.0MVA | Cooling mode | Oil immersed self-cooling/forced air cooling |
| Rated voltage | 220.0kV/35.0kV | Insulation class | Grade F |
| Rated current | 68.19A/197.75A | Impedance voltage | 7.5% |
| Rated frequency | 60.0Hz | Temperature rise limit | Top oil temperature rise ≤55.5K, Winding temperature rose≤65.5K |
| Rated power | 15000.0kW | Short-circuit impedance | High pressure - Medium pressure:Xk=15%, High-low pressure:Xk=36% |
| Efficiency | ≥99% | Phase number | Three phase |
| Conditions of use | Outdoors | Wiring group | Yn,d11 |
Description of fault types and feature vectors
| Fault number | Fault type | Eigenvector description | Sample size |
|---|---|---|---|
| 01 | Abnormal position of circuit breaker | Breaker load | 150 |
| 02 | The circuit breaker trips and breaks | Device trip signal | 200 |
| 03 | Single-phase grounding | Secondary loop current | 250 |
| 04 | Distance protection | Circuit breaker phase A current | 200 |
| 05 | The secondary control circuit is disconnected | Resistive leakage current | 250 |
| 06 | Oil level anomaly | Transformer oil position | 300 |