Bidirectional impedance-type transformer inrush current limiter

Tseng, Hsu Ting; Chen, Jiann Fuh

doi:10.1016/j.epsr.2013.06.007

Cited by 12 publications

(7 citation statements)

References 25 publications

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“…In [23][24][25], a current limiter is proposed and then the applicability in limiting inrush current, fault current and the capacitive switching transients is investigated. The topology is a combination of variable DC voltage source, two diodes and two DC reactors in each phase.…”

Section: Research Articlementioning

confidence: 99%

“…In this paper, a six-diode six-reactor TCL for suppressing transformer inrush, motor starting and fault currents in power system is proposed. The proposed circuit topology is an improved variation of DC-reactor type ICLs such as the ICLs presented in [23][24][25], in which the variable DC voltage source is discarded to address the cost, complexity and reliability issues. The proposed TCL can be applied to the primary side of both delta and Y connected transformers.…”

Section: Research Articlementioning

confidence: 99%

“…The following drawbacks limit the applicability of the proposed topology: High construction and maintenance cost due to adopting variable step‐down transformer and high power diode bridge. Low reliability due to varying output of transformer mechanical/electrical tap changer. Control circuitry requirement for setting DC voltage source; consequently, the increase in cost and complexity. Increasing power loss due to adopting step‐down transformer and power semiconductors. The deficiency of emanating inrush current from the topology itself, for adopting step‐down transformer in the topology. Large size of step‐down transformer in high‐voltage applications. Complexity in controlling step‐down transformer turn ratio in high‐voltage applications. In this paper, a six‐diode six‐reactor TCL for suppressing transformer inrush, motor starting and fault currents in power system is proposed. The proposed circuit topology is an improved variation of DC‐reactor type ICLs such as the ICLs presented in [23–25], in which the variable DC voltage source is discarded to address the cost, complexity and reliability issues. The proposed TCL can be applied to the primary side of both delta and Y connected transformers.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Transient current limiter for suppressing transformer inrush, motor starting and fault currents in power system

Amiri

Akhbari

2017

IET Electric Power Applications

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Transient currents (TCs) including transformer inrush, motor starting and fault currents cause mechanical, thermal and electrical stresses to the transformer windings and the power utility equipments. Of these, the inrush current suppression is crucial due to high second harmonic level, causing inadvertent operation of the protective relays. In this study, a TC limiter (TCL) comprising of two diodes and two reactors in each phase is proposed. The number of diodes in the proposed TCL is the half of those employed in the single-phase diode-bridge type inrush current limiter (ICL); thus, the proposed TCL topology offers much more reliability and lower cost in addition to lower current ripple. Comparing with the three-phase diode-bridge type ICL, the proposed topology is independent of the transformer primary winding connection type. The analysis and design procedure is provided and the performance is verified through simulation and an experimental scaled down prototype for transformer energising, motor starting and fault event.

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Section: Research Articlementioning

confidence: 99%

Section: Research Articlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transient current limiter for suppressing transformer inrush, motor starting and fault currents in power system

Amiri

Akhbari

2017

IET Electric Power Applications

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“…Therefore, it is important to minimize inrush current in power transformers. There are various efforts for reducing inrush current, including voltage compensation type inrush current limiter [1] using a storable reactor [2] depends on box dimension [3] employing reference modifier to the outer loop or the voltage loop to limit transformers inrush currents [4] installing a transformer differential protection system [5] applying grid-connected photovoltaic system [6] using bidirectional impedance-type inrush current limiter [7]. To reduce inrush current the authors in [8] employed a diode bridge while the others based on refluxing and controlled switching [9].…”

Section: ░ 1 Introductionmentioning

confidence: 99%

Power Transformer Inrush Current Minimization During Energization using ANFIS based Peak Voltage Tracking Approach

Alkhayyat,

Aiwa,

Alhfidh

et al. 2024

IJEER

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Energizing the power transformer at no load causes inrush current flow. The value of this current depends on main three factors, the residual and saturation flux of the transformer core, the rating of the transformer, and the switching instant. Inrush current may decrease the life of the transformer and causes mall function of the protective relays. Many efforts were done for limiting the inrush current using a current limiter or improve the core material to reduce residual flux. Other treating is to control energizing instance. This paper focused on controlling the instant of the transformer energization switch using fuzzy logic inference system. A new technique depends on adaptive seeking the crest of the voltage waveform. By this method there is no need to zero-crossing technique or phase looked loop. At this point, the flux of the core reaches the minimum value. Simulation and laboratory results show the success of this technique in reducing the inrush current. This technique gives the freedom to the operational engineering for energizing the power transformer at any time.

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“…The bridge-type FCLs with reduced number of controlled devices for inrush current limitation has been given in [21]. In order to reduce the magnitude of inrush current, a bidirectional impedance-type inrush current limiter (BIT-ICL) is proposed in [22]. Application of new control strategy to improve the fault ride through capability of doubly fed induction generator (DFIG) during the symmetrical and asymmetrical grid faults is studied in [23].…”

Section: Introductionmentioning

confidence: 99%