Evaluation of Electric Field and Space Charge Dynamics in Dielectric under DC Voltage with Superimposed Switching Impulse

Kwon, Ik-Soo; Kim, Sun-Jin; Asif, Mansoor; Lee, Bang-Wook

doi:10.3390/en12101836

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…This is because at these regions with two dissimilar magnitudes of doping concentration close to one another, form an important concentration gradient which leads to difference in charge carrier concentration sideways to the spatial dimension as shown in Figure 5. This reaffirms that, the more the impurities the more the space charge and vice-versa which give rise or fall of drift current across the entire detector as supported by Kwon et al (2019). Hence, it can also be established that, epitaxial region appeared to be schottky due to the low magnitude of spaced charge at the region.…”

Section: Space Chargesupporting

confidence: 71%

Modeling and Bulk Characterization of 4HSIC Radiation Detector in Sentaurus TCAD Simulation Environment

Garba,

Nasiru,

Abubakar

et al. 2024

dujopas

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This paper gives an insight into the need for radiation detection and the most commonly flexible and efficient radiation detector. It also examines bulk characteristics of 4H-SiC semiconductor radiation detector with Ni and Ti as metals for the contact. Bulk characterization of the device, including: doping concentration, electrons and holes behaviors, space charge and current densities were carried out. The modeling is conducted using Sentaurus Technology Computer Aided Design (TCAD) to examine charge transport in bulk 4HSiC material. Data obtained were further analyzed through Sentaurus visual, sentaurus Techplot and Excel to clearly determine the characteristics of the device. It is observed that when the semiconductor and metal are in contact, the Fermi-level is established where the doping concentration varied with either magnitude of the doping concentration or nature of the dopant. Similarly, Schottky and ohmic contacts and temperature effect were observed from the device characteristics which demonstrate that, the detector can withstand a temperature from the range of 100K to 700K in no fluctuating state.

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Section: Space Chargesupporting

confidence: 71%

Modeling and Bulk Characterization of 4HSIC Radiation Detector in Sentaurus TCAD Simulation Environment

Garba,

Nasiru,

Abubakar

et al. 2024

dujopas

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“…Therefore, to minimize the noise, a DC transformer with less than 1% ripple was used. In a DC electric field, the temperature of the specimen affects the conductivity, and the conductivity affects the DC partial discharge characteristics [39,40]. The oil bath and oil circulation tank are filled with high viscosity mass to simulate the environment of the MI-PPLP cable.…”

Section: Partial Discharge Measurement Systemmentioning

confidence: 99%

A Novel Diagnosis Method for Void Defects in HVDC Mass-Impregnated PPLP Cable Based on Partial Discharge Measurement

Kim

Lee

2021

Energies

Self Cite

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Mass Impregnated PPLP cable, which is applied to various high-voltage direct current (HVDC) projects due to its excellent dielectric and temperature properties, has a problem wherein voids are formed inside the butt-gap due to cavitation. However, there has been no previous research into technology for void defect identification and insulation diagnosis on HVDC MI-PPLP cables. In this paper, to propose an insulation diagnosis method for void defects in HVDC MI-PPLP cable, the direct current (DC) void discharge patterns were analyzed according to the specimen temperature and the magnitude of applied voltage using the pulse sequence analysis method. In addition, to confirm the pre-symptoms of dielectric breakdown in MI-PPLP cable due to DC void discharge, partial discharge patterns were analyzed continuously until dielectric breakdown occurred. From the experimental results, DC void discharge patterns of the same shape were obtained regardless of the specimen temperature and the magnitude of applied voltage. In addition, it was confirmed that new insulation aging patterns were generated as electrical and thermal aging occurred due to the continuous DC void discharge. Therefore, it is demonstrated that identification and insulation diagnosis of void defects in HVDC MI-PPLP cable is possible through the obtained DC void discharge and insulation aging patterns.

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“…Heat-tolerant NE NE1, NE2, and NE3 are used for investigation, subjected to HVAC under various electrode geometry. Equally, the electric field distribution of the liquid insulation under different geometry is integral to ensure that the electric field distribution varies according to the electrode shape [19,20].…”

Section: Introductionmentioning

confidence: 99%

Breakdown Voltage Prediction by Utilizing the Behavior of Natural Ester for Transformer Applications

Pakianathan¹,

Maheswari²

2023

Intelligent Automation &Amp; Soft Computing

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This research investigates the dielectric performance of Natural Ester (NE) using the Partial Differential Equation (PDE) tool and analyzes dielectric performance using fuzzy logic. NE nowadays is found to replace Mineral Oil (MO) due to its extensive dielectric properties. Here, the heat-tolerant Natural Esters Olive oil (NE1), Sunflower oil (NE2), and Ricebran oil (NE3) are subjected to High Voltage AC (HVAC) under different electrodes configurations. The breakdown voltage and leakage current of NE1, NE2, and NE3 under Point-Point (P-P), Sphere-Sphere (S-S), Plane-Plane (PL-PL), and Rod-Rod (R-R) are measured, and survival probability is presented. The electric field distribution is analyzed using the Partial Differential Equation (PDE) tool. NE shows better HVAC with stand capacity under all the electrodes configuration, especially in the S-S shape geometry. The exponential function is developed for the oils under different electrode geometry; NE shows a higher survival probability. Likewise, the most influential dielectric properties such as breakdown voltage, kinematic viscosity, and water content are used to develop a Mamdani-based control system model that combines two variables to produce the surface model. The surface model indicates that the NE subjected for investigation is less susceptible to moisture effect and higher kinematic viscosity. Based on the surface models of PDE and fuzzy, it is concluded that NE possesses a high survival rate since its breakdown voltage does not react to changes in water content. Hence the application of NE in the transformer application is highly safe and possesses extended life.

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Evaluation of Electric Field and Space Charge Dynamics in Dielectric under DC Voltage with Superimposed Switching Impulse

Cited by 10 publications

References 22 publications

Modeling and Bulk Characterization of 4HSIC Radiation Detector in Sentaurus TCAD Simulation Environment

Modeling and Bulk Characterization of 4HSIC Radiation Detector in Sentaurus TCAD Simulation Environment

A Novel Diagnosis Method for Void Defects in HVDC Mass-Impregnated PPLP Cable Based on Partial Discharge Measurement

Breakdown Voltage Prediction by Utilizing the Behavior of Natural Ester for Transformer Applications

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