Summary
This paper proposes an active on-site calibration method through background current modulation. It can measure the error of the current transformer in service from 1% to 120% rated current percentage without power supply interruption. To prove the effectiveness of the method, an experimental validation was carried out. The on-site calibration results are compared with those obtained from off-line calibration. Calibration results showed that, the ratio and the phase angle errors under on-site and off-line calibration condition are less than 0.01% and 1′ respectively, which meets the requirement of the 0.2 accuracy class calibration.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | A3_11497_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | China, People's Republic of |
| Study committees | |
| File size | 795 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
QI Xin - China Electric Power Research Institute; ZHOU Feng - China Electric Power Research Institute; YIN Xiaodong - China Electric Power Research Institute; ZHAO Qiancheng - China Electric Power Research Institute; ZHANG Jun - China Electric Power Research Institute; WANG Quan - China Electric Power Research Institute
Keywords
On-site calibration, Current transformer, Current modulation, Ratio error, Phase error
