Abstract
In this paper, the different types of discharge in transformer were simulated based on the real transformer fault model. The optical partial discharge detection system was established based on optical sensors which were capturing partial discharge accompanied by optical effects. In this research, surface discharge and suspended discharge defect model was pressurized to generate partial discharge signal. The results showed that: Partial discharge optical signals could effectively respond the production and development process of transformer partial discharge. It was able to assess discharge level also. When the discharge phenomenon stabilized, the phase of surface discharge mainly between 60°~150°and 240°~330°, the phase of suspended discharge mainly between 260°~320°. According to the phase characteristic of discharge pattern, the creeping discharge and suspended discharge phenomenon of transformer can be distinguished. It laid the foundation for the application of transformer optical partial discharge detection technology.
Highlights
Power transformers are the core equipment of power transmission and distribution system
The partial discharge of electrical equipment produce light radiation, use photoelectric detectors detect light radiation signal generated by the partial discharge, the optical radiation signal was turned into an electrical signal by the interception of the enlargement and processed to the monitoring system, the extent of the partial discharge is assessed by the characteristic of electrical signals [3]
In order to analysis of the different discharge types of optical discharge characteristics, the optical partial discharge detection system (OPDS) was established based on optical sensors in the shielded room which was capture partial discharge accompanied by optical effects
Summary
Power transformers are the core equipment of power transmission and distribution system. The partial discharge of electrical equipment produce light radiation, use photoelectric detectors detect light radiation signal generated by the partial discharge, the optical radiation signal was turned into an electrical signal by the interception of the enlargement and processed to the monitoring system, the extent of the partial discharge is assessed by the characteristic of electrical signals [3]. It is a confined space inside transformer. In order to analysis of the different discharge types of optical discharge characteristics, the optical partial discharge detection system (OPDS) was established based on optical sensors in the shielded room which was capture partial discharge accompanied by optical effects
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