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New solid-state onload tap-changers topology for distribution transformers

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2 Author(s)
Faiz, J. ; Dept. of Electr. & Comput. Eng., Univ. of Tehran, Iran ; Siahkolah, B.

High controllability advantages of power electronic switches lead to their application in the tap-changer of distribution transformers. Using such switches leads to quick operation of the tap-changer and, thus, improved performance. Moreover, their application reduces maintenance and repair costs of tap-changers. This paper introduces a new solid-state onload tap-changer topology that has many steps with fewer power electronic switches compared with those reported in the literature. This tap-changer is designed for an 800-kVA, 20-kV/400-V distribution transformer, and the results are discussed.

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Power Delivery, IEEE Transactions on  (Volume:18 ,  Issue: 1 )