A Simple Fast and Accurate Simulation Method for Power Transformer Lightning Impulse Test

Mirzaei, Hassan Reza

doi:10.1109/tpwrd.2019.2904864

Cited by 10 publications

(7 citation statements)

References 9 publications

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“…Typically carried out using a multi-stage Marx Generator [7] or an Aperiodic Impulse Voltage Generator [8] it is a difficult test to conduct in the field due to the size of the equipment required [9] but it's a necessary test to ensure the safe operation of the DPT to be tested. In [10] the author proposes a new method that does not require bulky equipment and relies instead on computer-based simulations.…”

Section: B Lightning Impulse Testmentioning

confidence: 99%

Survey on the Advancements of Dielectric Fluids and Experiment Studies for Distribution Power Transformers

Carvalhosa¹,

Leite²,

Branco³

et al. 2021

REPQJ

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The main objective of this work is to summarize the most commonly used dielectric fluids in the power distribution transformers, as well as to discuss what are the latest and the rationale behind those trends. The favorable and unfavorable reasons for any choice behind each of those dielectric fluids will be discussed. Additionally, this work also advances the power distribution transformers health index most commonly used to assess the condition of the transformer.

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Section: B Lightning Impulse Testmentioning

confidence: 99%

Survey on the Advancements of Dielectric Fluids and Experiment Studies for Distribution Power Transformers

Carvalhosa¹,

Leite²,

Branco³

et al. 2021

REPQJ

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show abstract

“…In the second step, during the discharging mode, the voltage across the load is oscillated by the resonant frequency (f r ) approximated by Equation (10), and the time period (T) is approximated by Equation (11).…”

Section: Rpmentioning

confidence: 99%

“…The proper equivalent circuit should be an inductor and a capacitor in parallel connection as shown in Figure 1b, otherwise, it causes the conventional circuit generating the distort the LIV waveform from the standard requirement [4][5][6][7][8][9]. There are some studies [10][11][12] utilizing rigorous approaches for adjusting the waveform parameters according to the standard requirements. A crucial problem is that it is very hard to adjust the circuit components to obtain T 2 longer than 40 µs, even though a charging capacitance (C s ) of over 10 µF, and a very high tail-time resistance (R e ) of over 1 MΩ, are employed in the generation circuit.…”

Section: Introductionmentioning

confidence: 99%

Systematic Design and Circuit Analysis of Lightning Impulse Voltage Generation on Low-Inductance Loads

2021

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The well-known circuit for the generation of lightning impulse voltage (LIV) on low-inductance loads was introduced by Glaninger in 1975, and the circuit component selection was proposed by Feser. However, the circuit and the approach for the component selection have some difficulties for which further adjustment is required for obtaining the waveform parameters according to the standard requirement. In this paper, an extended Glaninger’s circuit with an additional series resistor is proposed. Furthermore, a systematic design and circuit analysis of LIV generation for low-inductance loads are developed. With the help of a circuit simulator, the circuit analysis for the component selection is described. The validity of the proposed circuit was confirmed by some experimental results in comparison with the simulated ones. The proposed circuit and component selection provide not only the generation waveform according to the standard requirement but also other promising performances in terms of the wide inductance load range from 400 μH to 4 mH, a voltage efficiency of over 80%, an overshoot voltage of below 5%, an undershoot voltage of below 40%, and a maximum charging capacitance of 10 μF. From the simulated and experimental results, the proposed circuit and component selection approach is very useful for the LIV tests on low-inductance loads instead of using the conventional approach based on trial and error.

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“…In fact, there are other approaches [14,15] for the circuit parameter selection in the lightning impulse voltage test on the low inductance load. The characteristics of the loads under test in the frequency domain are extracted, and trial and error approaches for the circuit parameter selection based on computer simulation are still utilized to obtain the test voltage waveform according to the standard requirement.…”

Section: Time Scale Of 1 µS/divmentioning

confidence: 99%

An Algorithm for Circuit Parameter Identification in Lightning Impulse Voltage Generation for Low-Inductance Loads

et al. 2020

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This paper presents an effective technique based on an artificial neural network algorithm utilized for circuit parameter identification in lightning impulse generation for low inductance loads such as low voltage windings of a power transformer, a large distribution transformer and an air core reactor. The limitation of the combination between Glaninger’s circuit and the circuit parameter selection from Feser’s suggestions in term of producing an impulse waveform to be compliant with standard requirements when working with a low inductance load is discussed. In Feser’s approach, the circuit parameters of the generation circuit need to be further adjusted to obtain the waveform compliant with the standard requirement. In this process, trial and error approaches based on test engineers’ experience are employed in the circuit parameter selection. To avoid the unintentional damage from electrical field stress during the voltage waveform adjustment process, circuit simulators, such as Pspice and EMTP/ATP, are very useful to examine the generated voltage waveform before the experiments on the test object are carried out. In this paper, a system parameter identification based on an artificial neural network algorithm is applied to determine the appropriate circuit parameters in the test circuit. This impulse voltage generation with the selected circuit parameters was verified by simulations and an experiment. It was found that the generation circuit gives satisfactory impulse voltage waveforms in accordance with the standard requirement for the maximum charging capacitance of 10 µF and the load inductance from 400 µH to 4 mH. From the simulation and experimental results of all cases, the approach proposed in this paper is useful for test engineers in selection of appropriate circuit components for impulse voltage tests with low inductance loads instead of employing conventional trial and error in circuit component selection.

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A Simple Fast and Accurate Simulation Method for Power Transformer Lightning Impulse Test

Cited by 10 publications

References 9 publications

Survey on the Advancements of Dielectric Fluids and Experiment Studies for Distribution Power Transformers

Survey on the Advancements of Dielectric Fluids and Experiment Studies for Distribution Power Transformers

Systematic Design and Circuit Analysis of Lightning Impulse Voltage Generation on Low-Inductance Loads

An Algorithm for Circuit Parameter Identification in Lightning Impulse Voltage Generation for Low-Inductance Loads

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