Summary
This paper presents the application of the radiometric (UHF) method for partial discharge (PD) detection in high-voltage assets in a power generation company. Vehicle-based radiometric inspections enabled rapid identification of PD signals. Two case studies are presented, specially a 245 kV capacitive voltage transformer, with laboratory tests confirming PD levels above 300 pC in the capacitive section. Complementary techniques, including HFCT and acoustic methods, supported the diagnosis. The radiometric approach allowed early detection of insulation deterioration, optimizing maintenance and replacement strategies. The results highlight the effectiveness of radiometric PD detection for predictive maintenance and asset management in air-insulated substations.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | D1_11401_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Brazil |
| Study committees | |
| File size | 1 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
CAETANO DOS SANTOS Mario A. - Itaipu Binacional Brazil; LEZCANO RIVAS Cesar J. - Itaipu Binacional Paraguay; SOBREIRA OLIVEIRA Sérgio H. - Itaipu Binacional Brazil; CARRRERAS RIOS Crhistian E. - Itaipu Binacional Paraguay; FONSECA DEMARCHI Tacio - Itaipu Binacional Brazil
Keywords
Radiometric, Monitoring, Partial Discharge, Ultra High Frequency, Capacitive Voltage Transformer
