Partition and recognition of partial discharge development stages in oil-pressboard insulation with needle-plate electrodes under combined AC-DC voltage stress

Li, Simeng; Wen, Si; Li, Qingquan

doi:10.1109/tdei.2017.006361

Cited by 37 publications

(10 citation statements)

References 23 publications

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“…The PRPD is good at developing stage and ETF was good at transition stage from prebreakdown stage. A higher comprehends to obtain 93.75% [7]. To compare the vegetable oil and mineral oil for PD characteristics, the relative permittivity is also higher than the mineral oil.…”

Section: Introductionmentioning

confidence: 99%

Development of Partial Discharge Signal in Ester Oil Impregnated Paper

Kalyanasundari*¹,

Ravindran²,

Maheswari³

et al. 2020

IJITEE

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Power transformer is the most exorbitant and controversially the most essential equipment. Insulation abortion in transformer can cause stretched term interruption to supply and loss of revenue and the important maintenance procedure. The power transformer consists of organic insulation like Mineral oil, pressboard and paper. In impecunious of bio- degradability and availability, ester oil is replaced by Mineral oil. The partial discharge is a tool for evaluate the insulation atrophy of dielectric materials. In this paper the results of a laboratory based experimental investigation of partial discharge activity in oil – impregnated paper. To guesstimate the statistical parameter for different electrode configuration like different configuration under open air gap condition.

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Section: Introductionmentioning

confidence: 99%

Development of Partial Discharge Signal in Ester Oil Impregnated Paper

Kalyanasundari*¹,

Ravindran²,

Maheswari³

et al. 2020

IJITEE

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“…CONVERTER transformers are widely used as vital equipment in high-voltage DC systems. Oil-pressboard (PB) insulation in the valve winding of a converter transformer is subjected to a combined voltage stress consisting of AC, DC, and harmonic components, thereby resulting in more complicated partial discharge (PD) behavior [1]. Creeping discharge, one of the typical PD behaviors in oil-immersed transformers, can induce severe insulation failure [2] and is more common in converter transformers than power transformers [3].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Creeping Discharge Caused by a Needle Electrode in Oil-Pressboard Insulation under +DC Voltage

Liu

2021

IEEE Trans. Dielect. Electr. Insul.

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This paper presents an analysis of the creeping discharge characteristics caused by a needle electrode in oil-pressboard insulation under a positive DC voltage. The discharge behavior under a strongly (model I) or weakly (model II) vertical component of the electric field is studied using partial discharge (PD) detections, camera observations, and charge distribution simulations. It is found that the development process of the creeping discharge can be divided into three stages according to the stepwise growth trends of apparent charge amplitude and PD repetition rate. The timeresolved PD pattern and equivalent time-frequency pattern are different in the two models. Most discharge pulses are unimodal with underdamped oscillations, but bimodal pulses can occur in model II. The streamer in model I has a tail caused by the stranded charge. A secondary streamer can occur in model II following the initial streamer, causing a bimodal PD pulse. The study findings can provide suggestions for the optimization of insulation design and the promotion of converter transformer maintenance.

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“…It has been revealed that the temperature rise, aging, and DC electric field components accelerate the creepage discharge development and (2) they intend to mainly find the characteristic parameters and recognition methods that can effectively characterize the creepage discharge development under ADCV. The currently available techniques for the recognition of partial discharge development process mainly include fingerprint recognition of discharge gray image [11], support vector machines (SVM) [12,13], back-propagation neural networks (BPNN) [14], and fuzzy clustering analysis of radar spectra [15]. Nevertheless, only limited research has been conducted on the pattern recognition of the creepage discharge development process of oil-paper insulation under ADCV.…”

Section: Introductionmentioning

confidence: 99%