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Power transformer assumes the important role in transportation of power energy; however, the initial faults inside transformer would eventually develop into catastrophic failure during its operation, which could result in the outage of equipment. Winding deformation and movement are considered to be the most common faults inside transformer. This paper proposed an online detection method for power...
The transformer can be illuminated by the T-type equivalent circuit model. The primary and secondary leakage impedance characterizes the copper losses and the exciting impedance reflects iron-core losses. The iron-core losses and the copper losses can be obtained by open-circuit and short-circuit test. However, the copper losses of the primary winding and the secondary winding cannot be separated,...
Inrush currents are high magnitude currents generated typically during energization of a transformer, being a large transient caused by saturation of the magnetic core of the transformer. The magnitudes of the inrush currents can be initially several times the rated load current which will cause error actions of the relay protection equipment [1]. When a transformer is put into operation at the optimal...
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