NDLI: Evaluating and derating of three-phase distribution transformer under unbalanced voltage and unbalance load using finite element method

Content Provider	IEEE Xplore Digital Library
Author	Njafi, A. Iskender, I. Genc, N.
Copyright Year	2014
Description	Author affiliation: Electr. & Electron. Eng. Dept., Gazi Univ., Ankara, Turkey (Njafi, A.; Iskender, I.) \|\| Eng. & Archit. Fac., Electr. & Electron. Eng. Dept., Yuzuncu Yil Univ., Van, Turkey (Genc, N.)
Abstract	Power transformers illustrate the majority of capital investment in transmission and distribution centers. Additionally, interruptions of power transformer have a significant economic Effects on the Performance of an electrical network. For this reason, the safe and reliable Performance relate directly to the Security and stability of power system. This paper studies the growth of power losses and Derating of Distribution transformer, working under unbalance voltage and unbalanced load conditions. In this paper, computer-based simulation utilizing the two and three dimensional finite element methods (3-D and 2_D FEM) are exploited as a tool for visualizing magnetic fields of distribution transformers. Finite Element Method (FEM) is one among popular numerical methods that is able to handle problem complexity in various forms. The performance of the transformer when the load and supply are balanced compared to the case in which voltage or load is unbalanced indicates that the unbalanced load only causes the copper loss to increase, while the unbalanced voltage not only increases copper loss but also adds to the core loss. The indices of voltage unbalance factor (VUF) are used in this paper to evaluate the unbalance propagation. This process enables the software to simulate and analyze different electromagnetic parameters such as magnetic flux lines, flux density, losses, and etc, under different input sources with high accuracy.
Sponsorship	IEEE Malaysia Sect. PE Chapt.
Starting Page	160
Ending Page	165
File Size	704862
Page Count	6
File Format	PDF
e-ISBN	9781479924226
DOI	10.1109/PEOCO.2014.6814418
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-03-24
Publisher Place	Malaysia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic flux Time stepping finite element (TSFEM) Magnetic cores Derating Windings Finite element analysis Distribution transformer Power transformers Magnetic fields Mathematical model Unbalanced load Unbalanced voltage
Content Type	Text
Resource Type	Article

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