Microwave radiometry is a novel method for monitoring contamination levels on high voltage insulators. The microwave radiometer described measures energy emitted from the contamination layer and could provide a safe, reliable, contactless monitoring method that is effective under dry conditions. The design of the system has focused on optimizing accuracy, stability and sensitivity using a relatively low cost architecture. Experimental results demonstrate that the output from the radiometer is able to clearly distinguish between samples with different contamination levels under dry conditions. This contamination monitoring method could potentially provide advance warning of the future failure of wet insulators in climates where insulators can experience dry conditions for extended periods.
- microwave radiometry
- high-voltage insulators
- contamination levels
Jiang, Y., McMeekin, S. G., Reid, A. J., Nekahi, A., Judd, M. D., & Wilson, A. (2015). Design of a microwave radiometer for monitoring high voltage insulator contamination level. In 2015 IEEE Electrical Insulation Conference (EIC) (pp. 189 - 192). IEEE. https://doi.org/10.1109/ICACACT.2014.7223506