Contribution to the study of transformer tank rupture due to internal arcing development of a computer simulation tool

Périgaud, Guillaume; Muller, S.; Bressy, Gaël De; Brady, Ryan; Magnier, Philippe

doi:10.1109/pes.2008.4596521

Cited by 10 publications

(3 citation statements)

References 9 publications

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“…12 was identical to the DFR record, it's predicted that the possible cause of transformer failure was internal arcing on phase R of primary winding (150 kV). According to the reference [10][11][12][13][14], internal arcing during fault could deform transformer tank which was similar to what happened in Fig. 1.…”

Section: Discussionsupporting

confidence: 59%

Investigation of transformer failure in Indonesia

Harsono¹,

Kusuma²,

Munir³

et al. 2018

MATEC Web Conf.

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Transformer failure investigation is important to obtain necessary actions which prevent similar failure from happening in the future. An investigation was conducted upon the failure of a transformer in Indonesia which damaged substation apparatuses nearby. To determine possible cause of the failure, the investigation was performed by doing visual inspection after failure, further analysis on related historical assessment result data and simulation using related nameplate and actual configuration. Most historical assessment result data showed no early failure indication of the transformer, while sweep frequency response analysis (SFRA) test result showed severe deformation on both primary and secondary winding. A simulation using Transient Analysis Program for internal short circuit between winding and ground was conducted and the output waveform was identical to Digital Fault Recorder (DFR) waveform data during transformer failure. Therefore, the possible cause of transformer failure was internal arcing on primary winding to ground which could not be interrupted by the protection system. According to visual inspection after failure, the possible cause of protection system malfunction was accidental open circuit in Current Transformer (CT) secondary circuit which damaged whole CT wiring.

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Section: Discussionsupporting

confidence: 59%

Investigation of transformer failure in Indonesia

Harsono¹,

Kusuma²,

Munir³

et al. 2018

MATEC Web Conf.

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“…Oil with dissolved oxygen cannot ignite a fire [4]. If the high-energy arc from the overcurrent breaks fast, the tank may burst and the high-temperature transformer oil may come into contact with metal at a temperature high enough to ignite it or the air may come into contact with metal and ignite the oil ( fire triangle theory) [5].…”

Section: Figure 2 Hv Tubular Oil Bushing Detailsmentioning

confidence: 99%

Strength Analysis of Tubular Oil to Oil Cable Box Power Transformer GIS 60 MVA in the Case of Voltage Arc Energy Using the Finite Element Analysis Method

Wilarso¹

2023

JESR

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The power transformer is an essential part of the electrical distribution system because it must be reliable and safe from fire and explosions, one of which is brought on by internal oil arching that results in overheating. In general, on the high voltage side of the transformer, there are power transformers fitted with tubular oil to oil cable boxes for the demands of the client. The tubular oil to oil cable box is installed to reduce space in substations with limited space as well as to boost safety against weather and pollution at the high voltage terminal section of power transformers. The goal of this investigation is to determine the cause of an explosion that occurred in a tubular oil-to-oil cable box on the high voltage side of a Gas Insulation System (GIS) type power transformer with a power of 60 MVA and a voltage rating of 150/20 kV. For all parties involved, this incident will serve as a lesson about what to avoid doing in the future with similar power transformers. In this study, we will use a qualitative method with Finite Element Analysis (FEA), which takes samples and data of a Gas Insulation System (GIS) power transformer on the high voltage side, especially in the analysis of tubular strength. This power transformer has a voltage rating of 150/20 kV and a power of 60 MVA. Applying normal pressure to a pressure that could harm the tubular oil to oil cable box can prevent damage. The tubular oil to oil cable box is built of SS400 material and has an 8mm thickness so that it can be determined how robust it is.

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“…In the 1970s, their use was banned because of their toxicity and new synthetic liquids with low flammability (i.e., with high fire points), such as silicone oils or synthetic esters were developed. These new fluids make it possible to avoid electrical transformer fires [57][58][59][60][61].…”

Section: History Of the Introduction Of Different Insulating Liquids ...mentioning

confidence: 99%

A Review on Electrical Breakdown of Natural Ester-Based Nanofluids Under Different Voltage Waveforms

Beroual,

Alkuhayli,

Mahmoud

et al. 2024

IEEE Access

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Environmental, safety, and availability constraints of mineral oils have led transformer manufacturers and researchers to turn to alternative liquid dielectrics to mineral oils. Thus, many works have focused on esters and more particularly on natural esters (NEs); commonly called vegetable oils; in recent decades. Besides their advantages (biodegradability, non-toxicity, recyclability, thermal stability, and safety) compared to mineral oils, natural esters have certain disadvantages including their high viscosity and their oxidation instability. Both of these properties can be improved by adding specific additives and nanoparticles. This paper is mainly focused on review of the breakdown voltage of natural ester-based nanofluids, one of the most significant parameters when selecting insulating fluids for high voltage devices and in particular for power transformers. Firstly, we take stock of the history of the introduction of fluids/oils in the field of electrical insulation and the return of vegetable oils in the transformer industry. Then, we present the main characteristics of vegetable oils and the different products based on vegetable oils currently on the market as well as those that are currently the subject of research and plants from which they come. The methods and techniques for the preparation/elaboration of these nanofluids and their stability are then exposed. Finally, we present the different results reported in the literature on the electrical breakdown of various types of natural esters when adding nanoparticles (NPs) issued from different materials (conducting, semiconducting, and insulating), under AC, DC and lightning impulse voltages, and discuss the involved mechanisms in the breakdown of nanofluids.

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Contribution to the study of transformer tank rupture due to internal arcing development of a computer simulation tool

Cited by 10 publications

References 9 publications

Investigation of transformer failure in Indonesia

Investigation of transformer failure in Indonesia

Strength Analysis of Tubular Oil to Oil Cable Box Power Transformer GIS 60 MVA in the Case of Voltage Arc Energy Using the Finite Element Analysis Method

A Review on Electrical Breakdown of Natural Ester-Based Nanofluids Under Different Voltage Waveforms

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