Journal
IEEE TRANSACTIONS ON POWER DELIVERY
Volume 36, Issue 1, Pages 488-491Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TEC.2020.3023596
Keywords
Circuit faults; Saturation magnetization; Windings; Inductance; Magnetic flux; Magnetic circuits; Inductors; Air-core inductance; dual reversible model; inrush currents; saturation inductance; transformer modeling
Categories
Funding
- National Natural Science Foundation of China [51837002, 51977018]
- National Key Research and Development Program of China [2017YFB0902701]
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A new method for measuring the magnetizing inductances of single-phase two-winding transformers is proposed in this letter, utilizing a dc source and an air-core inductor to significantly reduce costs and equipment size. This method has been experimentally validated and simulated with finite elements for two single-phase transformers.
In this letter, a new method is proposed to measure the magnetizing inductances of dual reversible models of single-phase two-winding transformers. Different from all available methods, a dc source is used to excite the transformer to produce deep-saturation through an air-core inductor. A small ac source is applied to the other winding to measure the two magnetizing inductances with only one test, significantly reducing the cost. The cost is further reduced because the necessary equipment is of smaller size than that for the available methods. The proposed method is validated experimentally and with finite elements simulations for two single-phase transformers.
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