The Correlation between Surface Tracking and Partial Discharge Characteristics on Pressboard Surface Immersed in MIDEL eN

Othman, Nooraini; Zainuddin, Hidayat; Aman, Azana Hafizah Mohd; Ghani, S. A.; Chairul, Imran Sutan

doi:10.11591/ijece.v7i2.pp631-640

Cited by 8 publications

(7 citation statements)

References 20 publications

(32 reference statements)

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“…When the HVDC supply is increased further to 25 kV, it is observed that there is luminous flashover between the electrodes that does not lead to a complete breakdown. This is similar to the non-breakdown breakdown event when a positive streamer bridges an open oil gap as reported in [15]- [18] and full discharge event during surface discharge at the oil pressboard interface in [19]- [21]. This phenomenon recurs when the HVDC supply is increased further, as shown in Figure 8 (STAGE 3, Images II and III).…”

Section: Stage Threesupporting

confidence: 82%

Dielectrophoresis Effect of Dielectric Liquids with Suspended Cellulose Impurities under DC Electric Field

Zainoddin¹,

Zainuddin²,

Aman³

2017

IJECE

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For decades, petroleum-based mineral oils are the insulating media conventionally used in the industry, particularly for high voltage (HV) applications. However, due to the disadvantages of mineral oils, there is growing interest in replacing these oils with environmentally friendly alternatives in order to fulfill the demanding requirements of dielectric liquids. One of the promising substitutes for mineral oils is ester oils. Nevertheless, the implementation of ester oils is not widespread compared with mineral oils due to the lack of understanding on the performance of ester oils in HV applications. Hence, the objective of this study is to investigate the bridging phenomenon of two dielectric liquids with different viscosities: palm fatty acid ester and mineral oil under the influence of direct current electric field. The results show that oil viscosity plays an important role in the formation of cellulose bridge and breakdown behavior. Keyword:Mineral oil Ester oil Bridging Cellulose pressboard Dielectrophoresis

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Section: Stage Threesupporting

confidence: 82%

Dielectrophoresis Effect of Dielectric Liquids with Suspended Cellulose Impurities under DC Electric Field

Zainoddin¹,

Zainuddin²,

Aman³

2017

IJECE

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“…However in order to create the breakdown, it needs to increase the number of pulse of this frequency into a certain large number of values. Theoretically it is known that within a large number of pulses the possibility of surface degradation will be more clearly seen, because almost all breakdowns occur at the surface that has been degraded [14,15]. In contrary, within…”

Section: Results 31 Partial Discharge Characteristicsmentioning

confidence: 99%

Breakdown on LDPE film due to partial discharge in air gap and its correlation with electrical properties and surface degradation

2019

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This paper describes the breakdown characteristic of the low density poly ethylene film caused by partial discharge in the air gap. The purpose of this paper is to clarify the effect number of discharge under repetition rectangular pulses with a needle-plane electrode system as a function of pulse frequency. The result performed, from 10 Hz up to 1000 Hz. From 10 Hz to 200 Hz, the pulse number up to breakdown did not change significantly with increasing the pulse frequency and the magnitude of partial discharge function of pulse number with varied frequency until breakdown were similar. By using both potential decay and surface degradation analysis function of number of pulse, the breakdown phenomena caused by partial discharge was shown to reveal a significant correlation between electrical properties and the transparency of its surface to change deposited on it by a partial discharge exposure.

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“…In this study, the "larger is better" S/N ratio was used to maximize the AC BdV for the reclaimed transformer oil, as given by Equation (1). The "smaller is better" S/N ratio was used to minimize the TAN and dynamic viscosity of the reclaimed transformer oil, as given by Equation (2).…”

Section: Experimental Design 21 Design Of Experimentsmentioning

confidence: 99%

“…The dielectric media typically used in transformers are petroleum-derived oils such as such as mineral insulating (MI) oils and silicone insulating (SI) oils. The lifetime of a transformer is primarily dependent on the insulating medium used in the transformer, which can be either solid or liquid [2]. Insulating liquids are generally preferable because these liquids serve a dual purpose: insulator and coolant.…”

Section: Introductionmentioning

confidence: 99%

A Preliminary Study on Optimizing the In-Lab Reclamation Process Parameters of Used Transformer Oils Using the Taguchi Method

Ghani¹,

Noorden²,

Muhamad³

et al. 2018

IJEECS

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In this study, the Taguchi method is used to optimize the in-lab reclamation process parameters of used transformer oils. The main benefit of this method is that one can determine the optimum parameters of the reclamation process in a simple, efficient, and cost-effective manner. The L4 (23) Taguchi design is used to optimize the following process parameters: (1) weight of the Fuller’s Earth adsorbent, (2) stirring speed, and (3) oil temperature. These parameters are optimized in order to minimize the AC breakdown voltage, total acid number, and dynamic viscosity of the reclaimed transformer oil samples. The signal-to-noise ratios are determined for each process parameter in order to identify the significance of each factor on the three output responses. Based on the results, the oil temperature has the most significant effect on the AC breakdown voltage whereas the weight of the Fuller’s Earth adsorbent has the most significant effect on the total acid number and dynamic viscosity of the reclaimed transformer oils. Tests are carried out to verify the results using the optimum reclamation process parameters and indeed, it is found that there is significant improvement in the mean AC breakdown voltage, total acid number, and dynamic viscosity for the reclaimed transformer oil compared with those for the used transformer oil. It is believed that this method can be an indispendable tool to determine the optimum parameters for the reclamation process without going through the hassle of trial and error associated with conventional experimentation.

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The Correlation between Surface Tracking and Partial Discharge Characteristics on Pressboard Surface Immersed in MIDEL eN

Cited by 8 publications

References 20 publications

Dielectrophoresis Effect of Dielectric Liquids with Suspended Cellulose Impurities under DC Electric Field

Dielectrophoresis Effect of Dielectric Liquids with Suspended Cellulose Impurities under DC Electric Field

Breakdown on LDPE film due to partial discharge in air gap and its correlation with electrical properties and surface degradation

A Preliminary Study on Optimizing the In-Lab Reclamation Process Parameters of Used Transformer Oils Using the Taguchi Method

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