Effects of thermal aging on creepage discharge in oil- impregnated pressboard under combined AC-DC voltage

Zhou, Yuanxiang; Fu, Jin; Huang, Meng; Le, TrungHieu; Huang, Jianwen; Liu, Z. H.; Lu, Licheng

doi:10.1109/tdei.2015.005023

Cited by 16 publications

(15 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The valve-side windings in a converter transformer withstand the voltage of complex waveforms [5]. The turn-to-ground insulation of the valve-side wingdings withstands pulsating DC voltage [5,6], also known as combined AC-DC voltage or AC and DC combined voltages [7][8][9][10]. The breakdown characteristics of OIP at pulsating DC voltage show many differences compared with that at AC voltage [6].…”

Section: Introductionmentioning

confidence: 99%

Breakdown Voltage and Its Influencing Factors of Thermally Aged Oil-Impregnated Paper at Pulsating DC Voltage

Zhang

Wang

et al. 2017

Energies

View full text Add to dashboard Cite

Abstract:Breakdown strength is an important electrical property of insulating paper. Oil-impregnated paper of various aging states was prepared. Its breakdown voltage was then measured at pulsating direct current (DC) voltage with various ripple factors, and alternating current (AC) and DC voltage for comparison, respectively. The AC breakdown voltage is the smallest, and pulsating DC (r = 1/5) breakdown voltage is the greatest before the paper reaches its end of life. A dielectric model was adopted to investigate the difference in magnitude of breakdown voltage at different voltage waveforms. Meanwhile, it was found that breakdown voltage fluctuated and even increased occasionally during the thermal aging process, and a somewhat opposite changing tendency versus aging time was observed for breakdown voltage at DC voltage and pulsating DC voltage with small ripple factors (r = 1/5 and 1/3), compared with AC voltage. The degree of polymerization (DP) and moisture content of the paper were measured, and the characteristics of the pores and cracks of the paper were obtained to investigate the possible influencing factors of breakdown voltage at different aging states. The results showed that the moisture content, oil absorption ability associated with pores and cracks of paper, and the damage to paper structure all contributed to the variation of the breakdown voltage versus aging time, while the importance of their influence differed as the aging state of paper varied.

show abstract

Section: Introductionmentioning

confidence: 99%

Breakdown Voltage and Its Influencing Factors of Thermally Aged Oil-Impregnated Paper at Pulsating DC Voltage

Zhang

Wang

et al. 2017

Energies

View full text Add to dashboard Cite

show abstract

“…The test circuit design was the same as that in Refs. [8,9]. The PD measuring instrument used the pulse current method for measurement; further, the sampling frequency of the system was 5 MHz, and the PD bandwidth was 0.04-1 MHz.…”

Section: Experimental Platformmentioning

confidence: 99%

“…In this study, the interval time ∆t of two adjacent discharges is used instead of the phase φ in the partial discharge under AC voltage. Then, the statistical characteristic spectra are formed by combining the interval time ∆t, partial discharge magnitude Q, and number of discharges n. Time-resolved pulse sequence analysis (TPRSA) was used to study the creepage discharge development process of oil-paper insulation under ADCV [8,9].…”

Section: Creepage Discharge Development Process Of Oil-paper Insulation Under Adcvmentioning

confidence: 99%

“…Existing studies on the creepage discharge characteristics of oil-paper insulation under ADCV focus mainly on two aspects: (1) they investigate the factors affecting creepage discharge, including different voltage types and electric field components [4], discharge characteristics [5][6][7][8], aging [9,10], and other factors. 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.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pattern Recognition of Development Stage of Creepage Discharge of Oil-Paper Insulation under AC-DC Combined Voltage based on OS-ELM

Zhang

Zhou

et al. 2020

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)

View full text Add to dashboard Cite

show abstract

“…The unaged is Aging0. After 2000 h, the amount of radiation is about 4160 MJ m −2 , which is equivalent to 28−30 months of UV exposure in the region [23].…”

Section: Ultraviolet Accelerated Aging Devicementioning

confidence: 99%

Effect of UV radiation aging on creepage discharge characteristics of high temperature vulcanized silicon rubber at high altitude

Zhou

Liang

2019

Plasma Sci. Technol.

View full text Add to dashboard Cite

The physicochemical properties and creepage discharge characteristics of aged high temperature Vulcanized (HTV) silicone rubber materials were investigated by ultraviolet radiation (UV) aging method in this study. The experimental results show that as the aging time increases, the creepage discharge flashover voltage increases first and then decreases. But the aging time has little effect on the creepage discharge inception voltage. With the aging time prolonged, the discharge endurance time of HTV silicone rubber is shortened, and the creepage discharge development velocity is accelerated. In the short time of applying voltage to aging material, the magnitude of discharge increases rapidly. According to the partial discharge characteristic parameters of creepage discharge, the whole creepage discharge process is partitioned into four stages. Compared with unaged HTV silicone rubber, the aged HTV silicone rubber has less fluctuation in performance parameters and a clear trend. The study found that UV aging not only affects the physicochemical and hydrophobic properties of the HTV silicone rubber, but also accelerates the development of creepage discharge under AC voltage.

show abstract

Effects of thermal aging on creepage discharge in oil- impregnated pressboard under combined AC-DC voltage

Cited by 16 publications

References 18 publications

Breakdown Voltage and Its Influencing Factors of Thermally Aged Oil-Impregnated Paper at Pulsating DC Voltage

Breakdown Voltage and Its Influencing Factors of Thermally Aged Oil-Impregnated Paper at Pulsating DC Voltage

Pattern Recognition of Development Stage of Creepage Discharge of Oil-Paper Insulation under AC-DC Combined Voltage based on OS-ELM

Effect of UV radiation aging on creepage discharge characteristics of high temperature vulcanized silicon rubber at high altitude

Contact Info

Product

Resources

About