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The Impact of Transformer Winding Connections of a Grid-Connected PV on Voltage Quality Improvement

Tumbelaka, Hanny Hosiana and Muljadi, Eduard and Gao, Wenzhong (2018) The Impact of Transformer Winding Connections of a Grid-Connected PV on Voltage Quality Improvement. [UNSPECIFIED]

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    Abstract

    In this paper, a high-power PV power plant is connected to the weak grid by means of a three-phase power transformer. The selection of transformer winding connection is critical especially when the PV inverter has a reactive power controller. In general, transformer winding connection can be arranged in star-star (with neutrals grounded) or star-delta. The reactive power controller supports voltage regulation of the power system particularly under transient faults. Its control strategy is based on utilizing the grid currents to produce a three-phase unbalanced reactive current with a small gain. The gain is determined by the system impedance. Simulation results exhibit that the control strategy works very well particularly under disturbance conditions when the transformer winding connection is star-star with both neutrals grounded. The power quality in terms of the voltage quality is improved

    Item Type: UNSPECIFIED
    Uncontrolled Keywords: Grid connected PV; Reactive power; Transformer winding; Voltage quality
    Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
    Divisions: Faculty of Industrial Technology > Electrical Engineering Department
    Depositing User: Admin
    Date Deposited: 24 Jul 2018 06:04
    Last Modified: 08 Jan 2019 10:28
    URI: http://repository.petra.ac.id/id/eprint/18053

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