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The Effect of Moisture on the Creepage Discharge of Transformer Pressboard
This paper addresses the creepage discharge process in moisture-absorbed pressboard under the AC voltage stress. The measurement for partial...
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Investigation of the effect of layered structure on partial discharges in transformer pressboard insulator
The dielectric performance of pressboards impregnated with mineral oil is one of the key points in regard to the quality of the transformer’s working...
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Real-time analysis of the associated currents of cree** discharge propagating over different liquid/pressboard interfaces under lightning impulse voltages
This paper reports on a comparative experimental study of the current waveforms accompanying the propagation of cree** discharges over different...
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Distribution Characteristics of Slightly Uneven Electric Field in Oil of Oil-Pressboard Insulation Structure Under DC Voltage
Nowadays, the converter transformer has become one of the key equipment in the High voltage direct current (HVDC) transmission system. Due to factors...
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Evolution Characteristics of Partial Discharge Inception Voltage and Breakdown Voltage of Different Oil-Impregnated Pressboard with Increasing Aging Time
As a key component of high-voltage DC transmission, the insulation failure rate of the converter transformer has remained high. The main insulation...
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The Effect of Temperature on the Distribution Characteristics of Spatial Electric Field in Oil of Oil-Pressboard Insulation Under Impulse Voltage
The electric field characteristic of oil-paper/pressboard composite insulating structures under impulse voltage is critical for reliable design of...
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The Effect of Moisture on the Frequency Domain Dielectric Characteristics of Transformer Oil-Paper Insulation Over a Wide Temperature Range
Stable operation of transformers is critical to ensure power supply safety in the grid. At lower temperature conditions, the physical state of...
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Experimental Investigations of Mechanical and Chemical Properties of PVP Precompressed Pressboard Insulation for HV Power Transformers
As the rating of power transformers increases, oil–paper insulation requirements become extremely difficult as insulation system should have more...
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Analysis of the Effect of Different Damped Forms on the High Voltage Frequency Domain Spectroscopy Characteristics of Oil-Paper Insulation
The transformer is particularly important for the safe and reliable operation of State Grid, and different damped form has a significant impact on...
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Experimental Study on the Partial Discharge Inception Characteristics of Different Pressboards for Electrical Purpose
Partial discharge inception characteristics is one of the important performance indicators of electrical pressboard, which can effectively...
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Effect of Al2O3 nanorods on the performance of oil-impregnated pressboard insulation
The mineral oil (MO) in conjunction with paper is the main insulation components in oil-immersed transformers; their insulation properties play a...
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Comparison of electrostatic charging tendency of Jarylec and mineral oil
This paper deals with a comparative study of the electrostatic charging tendency (ECT) of a synthetic oil namely mono/dibenzyltoluene (M/DBT known as...
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Adoption of response surface methodology for optimization of benzotriazole additive in ester fluids as transformer insulant
This paper reports the critical investigation on the streaming current of ester fluids towards power transformer. The spinning disc methodology is...
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Cree** Discharge Behaviour on Pressboard Interface in Vegetable and Mineral Oils Under Non-uniform DC Stress
This paper presents the experimental results on the behaviour of cree** discharges at the vegetable or mineral oil/solid insulator interface under...
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Researches on the Discharge Characteristics of the Novel 3-Element Mixed Oil-Pressboard Insulation System Under Severe Non-uniform Electrical Field
A novel 3-element mixed insulation oil was developed successfully by our team. Its key parameters meet the requirements of IEC 60296:2012. Taking...
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Investigation of Partial Discharge Due to Particle Movement in Power Transformer Using Computational Fluid Dynamics and Monte Carlo Technique
The paper deals with the movement of metallic particle contaminants in transformer oil and partial discharges due to its presence inside the power...
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Statistical analysis of induced magnetic fields on oil-impregnated insulation pressboards
Electrical insulation materials are highly exposed to electrical network-based electric and magnetic fields in power systems. In electrical fields,...
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Vibration Model of Operating Transformer Windings Considering the Dynamic Stiffness
The transformer is the key equipment in the power system, and the winding is the core component of the transformer. Mechanical structure...
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Research on Reduction Method for Dielectric Dissipation of Transformer Oil-Paper Insulation at Low Temperature
In extremely cold regions, the dynamic viscosity concerning the transformer oil in the oil-immersed transformer will change in winter. The dielectric...
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Electric Field Analysis and Research of 1000 kV AC Transformers High Voltage Direct Type Exit Device
At present, two kinds of high voltage exit devices are used in 1000 kV transformer products, direct exit and indirect exit devices. The structure of...