A new multiresolution based pattern recognition approach is proposed for fault diagnosis of distribution switchgear. The wavelet transform is used to extract the key features from the vibration spectra following circuit breaker operation. These features are then used to plot a 2-D diagram or condition map. This map displays clearly the actual condition of the circuit breaker and it can also be ...

For analyzing partial discharge ultrasonic wave characteristic on typical defects in SF6 gas insulation switchgear (GIS), a 110 kV GIS was taken as an object to design and simulate the typical partial discharge models in GIS There are point electrode model on bus and cavity of GIS, floating electrode model, air interstice model in insulator, metal particle and iron core electromagnetic shock mo...

In order to eliminate the internal condensation of enclosed switchgear cabinet, this paper introduced a subminiature and high-performance dehumidifier based on semiconductor refrigeration technology. This equipment utilized a Fuzzy self-tuning PID intelligent controller to monitor the humidity change in the cabinet continuously and judged the dehumidifier start-stop automatically. Besides, real...

In the operation of broadcasting transmitter, during a lightning storm, comes to frequent surge arrester failures in switchgear transmitter and along 10 kV supply cable (surge arresters section boxes). Analysis strokes is given paper. EMTP simulation loading was conducted. The energy overload due flash with more than one or flashes short time. Recommendations were also for improvement existing ...

Abstract The robustness of switchgears has critical impacts on the general efficiency power distribution systems. Faulty lead to many unwanted complications for utility bodies, which in turn even bigger issues. In this paper, a remote arcing fault sensing technique is proposed using ELM. By analysing sonic waves emitted, method capable detect possible faults switchgears. Tests and experiments h...