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- Title
Compact system for onsite calibration of 1000 kV voltage transformers.
- Authors
Shuangshuang Zhao; Qifeng Huang; Min Lei
- Abstract
This study describes the development and evaluation of a compact system for onsite calibration of 1000 kV voltage transformers in ultra-high-voltage (UHV) AC power transmission projects. The proposed compact system consists of a 1000 kV electromagnetic voltage transformer as a standard, a high-voltage resonant power supply, and a voltage transformer test set, which are assembled and mounted on a calibration truck. The developed system accuracy is 0.05% in ratio and 0.058 mrad in phase angle, respectively. Also, the total basic uncertainty is about ±0.028% and ±0.03 mrad under field conditions. The compact system can be automatically set up and taken down quickly on site requiring no substation cranes or utility operating crews. It has successfully undergone complete field tests and calibrated 63 1000 kV voltage transformers in total at 5 UHV substations. The feasibility of an automatic and efficient approach to calibrating UHV voltage transformers on site has been demonstrated.
- Subjects
POWER transmission; POWER transformers; POWER resources; ELECTRIC power distribution; ELECTRIC potential
- Publication
IET Science, Measurement & Technology (Wiley-Blackwell), 2018, Vol 12, Issue 3, p368
- ISSN
1751-8822
- Publication type
Article
- DOI
10.1049/iet-smt.2017.0372