Potential Usage of Magnetic Liquids in High Voltage Test Devices

The paper provides a basic theoretical and technical framework for implementing a magnetic-liquid into a high-voltage coil in order to achieve a continuously variable and saturable inductor. Such design, implemented to the Glaninger extension, has a favorable effect on the tail time compensation when the lightning impulse is applied to the low inductive transformer's winding. The numerical investigation of the voltage response over the winding has been performed by using a magnetic liquid and an air core based coil in the Glaninger extension. Comparison of results exposes the advantages and disadvantages that arise by involving the magnetic liquid into the Glaninger extension.