39th International Universities Power Engineering Conference - UPEC 2004, Bristol (Reino Unido). 06-08 septiembre 2004
Resumen:
Instrument transformers are key elements within the modern transmission and distribution systems of electrical energy. Conventional inductive transformers for electrical currents measurement in high-voltage grids are expensive devices with a significant risk of explosion. This paper describes a new approach based on the propagation of elastic waves through dielectric media. The measurement system is composed by a current sensor and the associated electronic modules. The current sensor is formed by emitter, transmission structure, and receiver. The magnetostrictive material of the emitter generates elastic (mechanical) waves under the alternate magnetic field induced by the primary current to be measured. Thus the 50 Hz, or 60 Hz, electrical signals are converted into elastic waves that propagate through a dielectric coupling structure until they reach the receiver. In the receiver side the elastic waves are converted back into electrical signals.
Palabras clave: No disponible/Not available
Fecha de publicación: septiembre 2004.
Cita:
Talavera, J.A., Carnicero, A., López-García, O., Mateo, C., Ruiz, R., Electrical current measurement based on elastic waves propagation through dielectric materials, 39th International Universities Power Engineering Conference - UPEC 2004, Bristol (Reino Unido). 06-08 septiembre 2004.
IIT-04-109C
