Propagation Characteristics of Impulse Creepage Discharge in Parallel Plane Gap with Protruding Point in Transformer Oil

Abstract

The propagation characteristics of the creepage discharge in parallel plane electrode gap with protruding point in transformer oil are observed and investigated in detail under an impulse voltage application, by using a high-speed Schlieren optical technique and a current measurement system by LED.
The streamer-like density changes appeared from the protruding point tip of one high voltage plane electrode and propagated to other earthed plane electrode.
In the present paper, the effect of an arrangement of a barrier insulator and an electric field direction on the propagation of the creepage discharge is discussed.