Yazar "Bal, Selva" seçeneğine göre listele

Listeleniyor 1 - 4 / 4
  • [ X ]
    Öğe
    A review of magnetically controlled shunt reactor for power quality improvement with renewable energy applications
    (Pergamon-Elsevier Science Ltd, 2017) Tumay, Mehmet; Demirdelen, Tugce; Bal, Selva; Kayaalp, Rahmi Ilker; Dogru, Burcu; Aksoy, Mahmut
    Renewable energy sources are widely available on Earth; hence they have attracted much interest in both research and practical applications. In the large scale renewable energy system, power quality into the grid, especially harmonics and flicker, impacts on grid system significantly. In recent years, magnetically controlled shunt reactors (MCSRs) have been widely used to solve the problems of the power quality caused a failure or malfunction of the end-user equipment. MCSR can simplify the system reactive power and voltage control in the super / special high-voltage power grid, suppress power frequency and operation over voltage, eliminating generator self excitation, dynamically compensate charging the power in a transmission line, suppress the secondary arc current, damping system resonance and so on, which can meet the various needs of the system, it has a very broad application prospects. This paper presents a comprehensive review of MCSR configurations, the control strategies, the selection of components, other related economic and technical considerations, and their selection for specific applications. It is aimed at providing a broad perspective on the status of MCSR technology to the researchers and the application engineers dealing with power quality issues. A list of more than 130 research publications on the subject is also appended for a quick reference.
  • [ X ]
    Öğe
    Energy-efficient phase-shifting transformers for rural power systems with solar PV energy sources: The state-of-the-art survey, artificial intelligence-based approach and a case study
    (Institution of Engineering and Technology, 2022) Demirdelen, Tuğçe; Esenboğa, Burak; Aksu, I?nayet Özge; Yavuzdeğer, Abdurrahman; Bal, Selva; Sakallioğlu, Burcu; Ciçibaş, Abdullah
    [No abstract available]
  • [ X ]
    Öğe
    Lightning Electric Field Analysis of a Transformer Using ANSYS Maxwell
    (Institute of Electrical and Electronics Engineers Inc., 2019) Bal, Selva; Demirdelen, Tugce; Tumay, Mehmet
    Lightning strike is a very important phenomenon for all electrical power systems because of over voltage impulse. Thus, lightning analysis is equally important for power issue. In this paper, lightning electric field analysis of an oil type distribution transformer with a 25-kVA power capacity using ANSYS Maxwell simulation program are proposed. Lightning impulse voltage applied to transformer, electric field and voltage distribution of the transformer during lightning are presented with simulation results. Critical regions that can cause breakdown on insulation materials between primary and secondary windings are shown as three dimensionally. Electric field distribution on critical regions on insulation material of two-dimensional model is also shown. The comparison of three and two-dimensional analyses are compared for insulation breakdown during lightning analyses. This paper provides advantage researchers and engineers whom design/produce/choose the transformer bushings/isolators and other insulation materials on a simulation program such as ANSYS. In future, optimization study for insulation materials and partial discharge localization will be done. © 2019 IEEE.
  • [ X ]
    Öğe
    Three-Phase Distribution Transformer Modeling and Electromagnetic Transient Analysis Using ANSYS Maxwell
    (Institute of Electrical and Electronics Engineers Inc., 2019) Bal, Selva; Demirdelen, Tugce; Tumay, Mehmet
    Oil type transformers have disadvantages such as insulation, weight, size, losses, heating and torsional forces. Transformer design and modeling has great importance in solution of such problems. In this paper, modeling and electromagnetic transient analysis of a three-phase oil type distribution transformer with a 25-kVA power capacity using ANSYS Maxwell simulation program is proposed. Transformer model, losses, voltages, currents and magnetic flux of designed transformer are presented in simulation results. Finite element method is used at the simulations. Results of input voltages are consistent with applied excitation values. Critical points on the core are seen from magnetic flux distribution. The result of magnetic flux of this study is validated by comparison of similar studies in literature. This paper provides advantage as a guide to researchers and engineers who do the transformer modeling and analysis on a simulation program such as ANSYS. In future, optimization study for thermal analysis and partial discharge localization will be done. © 2019 IEEE.