Abstract:

Optical Current Transformers (OCT) have been developed as an alternative to traditional current transformers. Significant improvements were achieved in these last years in order to find a suitable alternative to the classic measurement instruments. The development of digital technology has impacted power systems as well. Optical current transformers are an example of digital system applications in power systems. They have become more available and continue to develop over time. They are also called electronic transformers since their hardware is based on electronics. Optical transformers not only provide high accuracy but also eliminate the saturation problem that magnetic classical current transformers face. The following paper will show the use of such optical current transformer within o high voltage substation from the Romanian National Grid.