Oil-immersed transformer fault diagnosis method based on fault probability distribution model
An oil-immersed transformer, a technology of failure probability, applied in the direction of instruments, special data processing applications, electrical digital data processing, etc.
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[0034] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0035]A fault diagnosis method for an oil-immersed transformer based on a fault probability model, comprising the following steps:
[0036] Step (1): Collect a large number of data information of dissolved gas in transformer oil with known faults, select the H dissolved in the oil 2 、CH 4 、C 2 h 6 、C 2 h 4 、C 2 h 2 The gas content is normalized as a characteristic parameter to form a large number of data samples composed of characteristic parameters and fault types. Referring to IEC 60599, transformer fault types can be divided into six types: low temperature overheating T1 (below 300°C), medium temperature overheating T2 (above 300°C and below 700°C), high temperature overheating T3 (above 700°C ), partial discharge PD, low energy discharge D1, h...
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