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The fault rate of on-load tap-changer (OLTC) has always been in a high level, and that is exactly the primary reason of transformer faults. As a result, an on-line detection method of OLTC was proposed. The embedded platform and wireless sensor network (WSN) technology was introduced into the on-line detection system. WSN was used to obtain OLTC status information. The embedded platform software,...
Mechanical malfunction or failure is the principal failure type of gas insulated switchgear(GIS) within transformer substations. Therefore, on-line monitoring of the mechanical characteristics of GIS is of utmost significance to achieve safe, stable and reliable operation of power systems. a simulated GIS is constructed in laboratory and two common GIS faults like screws loosening and free particle...
This paper puts forward the detecting and fault diagnosis method for GIS. The mentioned method detects and diagnoses faults by detecting abnormal vibration of the GIS. The paper gives out to diagnose the different fault types of the GIS, and make fingerprints for the GIS by monitoring these apparatus. The collected vibration signal was used in the mechanical defect diagnosis, which has proved its...
Online monitoring of the mechanical performance of onload tap changers (OLTCs) within high-voltage (HV) power transformers is of utmost significance for a safe, stable, and reliable operation of the power systems. This paper investigated a novel strategy based on a Hidden Markov Model (HMM) for mechanical fault diagnosis of OLTCs. With partition, normalization, and vector quantization of the power...
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