Scaled low-voltage side surge current tests on a model distribution system

McMillen, C.J.; Caverly, D.W.; Schoendube, C. W.

doi:10.1109/61.4304

Cited by 16 publications

(3 citation statements)

References 5 publications

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“…On the other hand, the voltage between 2 and 0 terminals . It is confirmed that the interlaced winding of the secondary side is effective for the reduction of the impulse voltage occurring at the secondary windings (4) . ( 2 ) Case 2 Figure 17 shows the voltage distribution of the secondary windings in Case 2.…”

Section: Influence Of Wavefront Time Of Injected Currentmentioning

confidence: 67%

Voltage Distribution of Internal Windings of Pole-Mounted Distribution Transformer by Lightning Surge and Measures for Voltage Reduction

2005

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MemberWhen steep lightning surge enters a pole-mounted distribution transformer, the voltage distribution of the internal windings is unbalanced. It is known that a layer-to-layer short or a turn-to-turn short occurs where the voltage distribution of windings is high. In this paper, the voltage distribution of the windings was measured at the primary and secondary sides of the transformer using a testing transformer. The point of the windings where the highest voltage occurred was clarified. At the primary windings, large voltage occurs at the layer nearest the primary bushing, and the possibility of breakdown at this point is high. By field test using several types of surge arrestor, it is found that the lower the operating voltage of the surge arrestor installed in the primary side, the lower the voltage occurring at the primary windings. At the secondary windings, large voltage occurs at the layer closer to the neutral terminal, and the possibility of breakdown at this point is high. The lower the operating voltage of the surge arrestor installed in the primary side, the lower the voltage occurring at the secondary windings, too. Adding the surge arrestor in the secondary side, although effectively reduce line-to-line voltage, does not effectively reduce the voltage of the secondary windings.

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Section: Influence Of Wavefront Time Of Injected Currentmentioning

confidence: 67%

Voltage Distribution of Internal Windings of Pole-Mounted Distribution Transformer by Lightning Surge and Measures for Voltage Reduction

2005

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“…The core type of transformer construction with the interlaced winding is known t o eliminate such low-voltage side surge failures; however, this type of construction could cause higher overvoltages to appear in the c o~e c t e d customer's apparatus than in the non-interlaced windings case 1101. The insulation coordination of a distribution transformer not only should eliminate the failures due to low-voltage side surges but also minimize the overvoltages transferred on to the apparatus connected to the secondary windings of the transformers [9,10]. The surge voltages transferred into the secondary of the transformer have been studied very little [ll-131. In view of the problems associated with the overvoltages appearing in the secondary winding due to surge transfer phenomena or to a surge impinging directly on the secondary line terminals, it is essential t o evaluate the transient response of the secondary windings.…”

Section: S Jayaram and H S Chandrasekharaiahmentioning

confidence: 99%

Influence of Secondary Winding Terminal Conditions on Impulse Distribution in Transformer Windings

Jayaram

Chandrasekharaiah

1993

Electric Machines & Power Systems

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“…Overvoltage studies can present a considerable variety of possibilities of modeling of low-voltage power installations (LVPI) in distribution systems, either in laboratory experimental setups or in digital simulations. In (Mcmillen et al 1988 ; Dugan and Smith 1988 ; Smith and Puri 1988 ; Goedde et al 1992 ; Hosfet et al 1992 ; Standler 1992 and Mirra et al 1997 ) the consumers are represented by lumped resistances or capacitances or simple association of them. In (Borghetti et al 2005 ) it was used the matching impedance of the low-voltage line for representing the consumers.…”

Section: Introductionmentioning

confidence: 99%

High frequency input impedance modeling of low-voltage residential installations - influence on lightning overvoltage simulations results

Bassi

2014

SpringerPlus

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The overvoltage level of a system is strongly dependent on the connected loads and with more precise models, better and more reliable simulation results are obtained. This paper presents the input impedance characteristics, measured over a wide range of frequencies, of various actual low-voltage residential installations. The measured frequency responses were fitted by effective RLC models and a general model was also developed. The range of frequencies considered in the study, nearly d.c. up to 5 MHz, allows the use of these models for lightning or switching studies. It is also presented overvoltage simulations, using different residential installations models presented in the paper, of a distribution network subjected to lightning surges on the medium voltage circuit.

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Scaled low-voltage side surge current tests on a model distribution system

Cited by 16 publications

References 5 publications

Voltage Distribution of Internal Windings of Pole-Mounted Distribution Transformer by Lightning Surge and Measures for Voltage Reduction

Voltage Distribution of Internal Windings of Pole-Mounted Distribution Transformer by Lightning Surge and Measures for Voltage Reduction

Influence of Secondary Winding Terminal Conditions on Impulse Distribution in Transformer Windings

High frequency input impedance modeling of low-voltage residential installations - influence on lightning overvoltage simulations results

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