Modelling and analysis of transformer using numerical and analytical methods

Dawood, Kamran; Çınar, Mehmet Aytaç; Alboyacı, Bora; Sönmez, Oluş

doi:10.1109/isef.2017.8090696

Cited by 12 publications

(4 citation statements)

References 2 publications

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“…The short-circuit resistances determine not only the load losses but also efficiency and proper operation of the transformers. These parameters, jointly with the short-circuit reactance, determine the short-circuit impedances that limit the values of short-circuit currents and their adverse effects on the transformer windings due to vibrations [23][24][25][26] and electromagnetic forces [27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Load Losses and Short-Circuit Resistances of Distribution Transformers According to IEEE Standard C57.110

León-Martínez,

Peñalvo-López,

Andrada-Monrós

et al. 2023

Inventions

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Load losses determine transformers’ efficiency and life, which are limited by overheating and deterioration of their elements. Since these losses can be characterized by short-circuit resistances, in this article, we have developed expressions for the short-circuit resistances of three-phase transformers according to IEEE Standard C57.110. Imposing the condition that these resistances must cause load losses of the transformer, two types of short-circuit resistance have been established: (1) the effective resistance of each phase (Rcc,z) and (2) the effective short-circuit resistance of the transformer (Rcc,ef). The first is closely related to the power loss distribution within the transformer. The second is just a mathematical parameter. Applying these resistances to the 630 kVA oil-immersed distribution transformer of a residential network, we have concluded that both types of resistances determine the total load losses of the transformer. However, only Rcc,z accurately provides the load losses in each phase. Rcc,ef can give rise to errors more significant than 16% in calculating these losses, depending on imbalances in the harmonic currents.

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Section: Introductionmentioning

confidence: 99%

Load Losses and Short-Circuit Resistances of Distribution Transformers According to IEEE Standard C57.110

León-Martínez,

Peñalvo-López,

Andrada-Monrós

et al. 2023

Inventions

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“…Along with all of these benefits, much improvement is still required in terms of the designing and material selection of Transformer cores [2]. The absence of the proper designing and selection of material for manufacturing the core causes an adverse impact on the overall system in terms of efficiency, losses and thermal degradation [3,4]. There are different losses that can be counted during the manufacturing of T/F; however, core losses are very crucial [1,3,5].…”

Section: Introductionmentioning

confidence: 99%

“…The absence of the proper designing and selection of material for manufacturing the core causes an adverse impact on the overall system in terms of efficiency, losses and thermal degradation [3,4]. There are different losses that can be counted during the manufacturing of T/F; however, core losses are very crucial [1,3,5]. Nowadays, many elements are used in the fabrication of the core of transformer to overcome the loss of magnetization and demagnetization.…”

Section: Introductionmentioning

confidence: 99%

Determine the Optimum Efficiency of Transformer Cores Using Comparative Study Method

Zahoor

Dogar

Hussain

2021

The 1st International Conference on Energy, Power and Environment

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The transformer is one of the most discussed and important components of electrical power systems because of its reliability, durability and energy conversion capability. It is also useful in load sharing, which reduces system burden, but is also responsible for a sufficient number of losses, as it is used in different types of electric appliances that require voltage conversion. The no-load losses of transformers have gained much attention from research perspective because of its operating cost throughout its lifetime. Many studies were carried out to achieve the highest possible efficiency, decreasing certain losses by using different methods and materials. However, the local market in Pakistan is far behind in the field of efficient core material manufacturing of transformers, which is why consumers are unable to obtain efficient electric appliances. Due to these loss-making appliances, the overall residential load increases and the consumers are charged with heavy electricity bills. This proposed study discusses core losses, different core comparisons, T/F efficiency and advancement in the core material. To accomplish a core comparison, two locally available core materials are used to fabricate two different T/F, and some tests such as open-circuit and short-circuit tests are performed to discover their losses, thermal degradation, and output efficiencies.

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“…Transformers are most expensive apparatus in a power network; reliability and stability of the transformer mainly depend on the leakage reactance of the transformer [1]. Efficiency and the voltage drop in a transformer on load are chiefly affected by its leakage reactance, which must be kept as low as design, and manufacturing techniques would permit.…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of axial displacement in transformer windings using finite element analysis

Dawood¹,

Çınar²,

Alboyacı³

2018

Journal of Mathematical Sciences and Modelling

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Transformer is one of the main equipment in the power system and power quality of the power system mainly depends on the working of the power transformer. Leakage reactance is one of the main parameters of the transformer. The design of the transformer has a significant impact on the leakage reactance of the transformer. The mechanical strength of the transformer mainly depends on the leakage reactance of the transformer. This paper investigates the leakage reactance of the transformer in normal conditions and during the axial displacement of the high voltage and low voltage windings using finite element analysis. Normal results of finite element analysis method are also compared with the experimental short-circuit test. Results show that leakage reactance of the transformer exponentially proportional to the displacement of the windings. It is observed that with the axial displacement of the 6% of the winding, leakage reactance increased by 10%. Results also show that effect of the axial displacement in high voltage and low voltage winding is almost same.

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Modelling and analysis of transformer using numerical and analytical methods

Cited by 12 publications

References 2 publications

Load Losses and Short-Circuit Resistances of Distribution Transformers According to IEEE Standard C57.110

Load Losses and Short-Circuit Resistances of Distribution Transformers According to IEEE Standard C57.110

Determine the Optimum Efficiency of Transformer Cores Using Comparative Study Method

Diagnosis of axial displacement in transformer windings using finite element analysis

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