Proceedings ArticleDOI
Use of power electronic converters to suppress transformer inrush current
Manisha Wani,Kalyani Kurundkar,M. P. Bhawalkar +2 more
- pp 1-5
TLDR
In this paper, inrush current limiters using power electronic converters like diode bridge with DC reactor and voltage source PWM converter are used to reduce inrush currents at the time of switching of the transformer.Abstract:
Magnetizing inrush current in transformer results from any abrupt changes of the magnetizing voltage. When a transformer is first energized, a transient current up to 10 to 50 times larger than the rated transformer current can flow for several cycles. This current is called as magnetizing inrush current. Magnitude of this current is dependent on number of parameters like switching instant of supply voltage, residual flux, the hysteresis characteristics of the transformer core, impedance of the primary circuit, etc. This magnetizing inrush current causes system disturbances and damages the transformer windings. To improve this situation inrush current is required to be reduced. This paper discusses inrush current limiters that reduce inrush current at the time of switching of the transformer. Here, inrush current limiters using power electronic converters like diode bridge with DC reactor and voltage source PWM converter are used. Simulations using MATLAB are carried out and results are tabulated. Experiment using DC reactor type inrush current limiter are carried out and results are given in the paper.read more
Citations
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Journal ArticleDOI
Solid state transformer technologies and applications: A bibliographical survey
TL;DR: A bibliographical survey of the work carried out to date on the solid state transformer (SST) is presented, providing a list of references that cover most work related to this device and a short discussion about several aspects.
Journal ArticleDOI
A Transformer Inrush Reduction Technique for Low-Voltage Ride-Through Operation of Renewable Converters
TL;DR: In this paper, the authors proposed a control method of the power converter to reduce the risk of inrush current by mitigating the magnetic flux deviation during the lowvoltage ride-through (LVRT) operation.
Journal ArticleDOI
Mitigation of Electric Arc Furnace Transformer Inrush Current Using Soft-Starter-Based Controlled Energization
TL;DR: In this article, a scheme to mitigate large inrush currents using a controlled voltage ramp soft-starter-based circuit is presented, and simulation and experimental results prove the effectiveness of the soft starter-based controlled energization.
Proceedings ArticleDOI
Transformer inrush current restraining scheme based on closing voltage amplitude controlling method
TL;DR: In this paper, a scheme of restraining transformer inrush current based on control by closing voltage amplitude is proposed based on analyzing the influence factors of transformer in-rush current and deriving the mathematical relationship between inrush currents and influence factors, in order to make sure that the magnetic flux produced by the transformer no-load closing does not exceed saturated magnetic flux, the voltage amplitude should be controlled by selecting the appropriate curve, thus attaining the goal restraining the transformer in rush current.
Proceedings ArticleDOI
A transformer inrush reduction technique for low-voltage ride-through operation of renewable converters
TL;DR: In this article, the authors proposed a method to mitigate the magnetic flux deviation and limit the peak current without excelling the current capability of semiconductor devices by using a close-loop current control during low-voltage ride-through operation.
References
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Book
Fundamentals of Power System Protection
Y. G. Paithankar,S. R. Bhide +1 more
TL;DR: An embedded interaction of generators through the transmission network which is governed by the differential and algebraic equations of the apparatus and interconnects is implied, which has to be protected from abnormalities.
Journal ArticleDOI
Single-Phase Transformer Inrush Current Reduction Using Prefluxing
TL;DR: In this paper, a prefluxing strategy was proposed to reduce the inrush currents in a single-phase transformer by setting the residual flux to a known polarity after the transformer has been de-energized.
Proceedings ArticleDOI
Investigation of Magnetizing Inrush Current in a Single-Phase Transformer
TL;DR: In this paper, the theoretical explanations of inrush currents and different factors that have influences on the shape and magnitude of those in-rush currents were explored and a practical power system circuit for single phase transformer was modeled.
Journal ArticleDOI
DC reactor type transformer inrush current limiter
M. Tarafdar Hagh,Mehdi Abapour +1 more
TL;DR: In this article, a new inrush current limiter (ICL) is presented to limit the in-rush current of transformers, which consists of three similar sets, each set includes a diode-bridge and a single DC reactor and is connected in series with the individual phases of transformer.
Journal ArticleDOI
Calculation and Analysis of Transformer Inrush Current Based on Parameters of Transformer and Operating Conditions
TL;DR: In this article, the effects of some factors on the inrush current of transformers were investigated and it was concluded that increasing circuit resistance or switching angle with respect to the remanent flux must be selected.