Characteristic Analysis of Partial Discharge of Free Metal Particle in GIS

Shi, Weidong; Yang, Zhuodong; Chen, H. X.; Lü, Zhiwei; Wang, D.; Xin, Weifeng

doi:10.1088/1755-1315/354/1/012121

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…These body forces will cause shunt reactors to have more serious vibration and noise problems than other electrical equipment. A large number of engineering practice experiences show that [7][8][9][10][11] , the loosening and falling off of bolts, shielding caps, and other metal parts caused by reactor vibration will form a partial voltage between high and low potential regions and lead to internal suspended discharge defects. It is essential to study the in uence of the internal vibration of the reactor on suspended discharge, and to explore the maximum eld strength that may be achieved during the movement of a suspension electrode under various vibration factors and applied voltage factors, as well as the maximum discharge that may be generated when the suspension electrode collides with the fuel tank.…”

Section: Introductionmentioning

confidence: 99%

Influences of the vibration frequency and phase of the core of ultra-high voltage shunt reactors on suspended discharge in oil-paper insulation

yu,

liu,

et al. 2024

Preprint

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Severe vibration of the core of ultra-high voltage (UHV) shunt reactors under the operating conditions often leads to the occurrence of suspension electrode, and such a suspended discharge defect will destroy the oil-paper insulation. It is necessary to investigate the influence of vibration on suspended discharge when determining the best operating condition of UHV shunt reactors. The vibration frequency of the suspension electrode and the phase difference between the applied voltage and the vibration are studied by simulation and experiment. The simulation results show that the phase difference between the voltage and the vibration parameters will result in the increase of the surface maximum field strength. The distortion of the field intensity caused by several typical vibration frequencies of reactor vibration is ranked (in ascending order) thus: 100 Hz, 300 Hz, 50 Hz, and 200 Hz. There is a coupling relationship between the phase difference and the vibration frequency on the suspended discharge, which will lead to an inconsistency between the field intensity and each single factor. The partial discharge test results of the collision between the suspension electrode and the high-voltage electrode show that the discharge generated by vibration at 100 Hz is much higher than that at other frequencies, followed by those at 300 Hz and 50 Hz, and the discharge generated by vibration at 200 Hz is very small. When the phase difference of voltage advance vibration is between 0 and 90°, the quantity of local discharge is large. When the phase difference is between 90° and 180°, the local discharge is small.

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Section: Introductionmentioning

confidence: 99%

Influences of the vibration frequency and phase of the core of ultra-high voltage shunt reactors on suspended discharge in oil-paper insulation

yu,

liu,

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…For example, during live line operation of transmission lines and substations, the process of operators entering the working potential [1] and the use of inspection helicopters [2] may cause floating discharge. In addition, foreign body intrusion in the transmission line corridor [3] and free metal defects in the high-voltage switchgear [4] will form a combined gap (air and conductive objects) between the charged body and the ground. Lightning protection systems often encounter discharge problems arising from floating conductive objects [5], and the lightning triggered by aircraft in thunderstorm environments is also a discharge phenomenon of floating conductors [6].…”

Section: Introductionmentioning

confidence: 99%

Simulation analysis on microscopic discharge characteristics of the bipolar corona of a floating conductor

Yang

Chen

Duan

et al. 2023

Plasma Sci. Technol.

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The floating conductor exhibits a bipolar corona phenomenon whose microscopic discharge characteristics are still unclear. In this work, a plasma simulation model of the bipolar corona with 108 chemical reaction equations is established by combining hydrodynamics and plasma chemical reactions. The evolution characteristics of electrons, positive ions, negative ions, and neutral particles, as well as the distribution characteristics of space charges are analyzed, and the evolutionary flow of microscopic particles is summarized. The results indicate that the positive end of the bipolar corona initiates discharge before the negative end, but the plasma chemistry at the negative end is more vigorous. The electron generation rate can reach 1240 mol (m3·s)−1, and the dissipation rate can reach 34 mol (m3·s)−1. The positive ion swarm is dominated by O+ 4, and the maximum generation rate can reach 440 mol (m3·s)−1. The negative ion swarm is mainly O− 2 and O− 4, the content of O− 2 is approximately 1.5–3 times that of O− 4, and the maximum reaction rate can reach 51 mol (m3·s)−1. The final destination of neutral particles is accumulation in the form of O3 and NO, and the amount of O3 produced is approximately 4–6 times that of NO. The positive end of the bipolar corona is dominated by positive space charges, which continue to develop and spread outward in the form of a pulse wave. The negative end exhibits a space charge distribution structure of concentrated positive charges and diffused negative charges. The validity of the microscopic simulation analysis is verified by the macroscopic discharge phenomenon.

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Influences of the vibration frequency and phase of the core of ultra-high voltage shunt reactors on suspended discharge in oil-paper insulation

Yu,

Liu,

et al. 2024

AIP Advances

View full text Add to dashboard Cite

Severe vibration of the core of ultra-high voltage (UHV) shunt reactors under operating conditions often leads to the occurrence of suspension electrode, and such a suspended discharge defect will destroy the oil-paper insulation. It is necessary to investigate the influence of vibration on suspended discharge when determining the best operating condition of UHV shunt reactors. The vibration frequency of the suspension electrode and the phase difference between the applied voltage and the vibration are studied by simulation and experiment. The simulation results show that the phase difference between the voltage and the vibration parameters will lead to an increase in the surface maximum field strength. The distortion of the field intensity caused by several typical vibration frequencies of reactor vibration is ranked (in ascending order) thus: 100, 300, 50, and 200 Hz. There is a coupling relationship between the phase difference and the vibration frequency on the suspended discharge, which will lead to an inconsistency between the field intensity and each single factor. The partial discharge test results of the collision between the suspension electrode and the high-voltage electrode show that the discharge generated by vibration at 100 Hz is much higher than that at other frequencies, followed by those at 300 and 50 Hz, and the discharge generated by vibration at 200 Hz is very small. When the phase difference of voltage advance vibration is between 0° and 90°, the quantity of local discharge is large. When the phase difference is between 90° and 180°, the local discharge is small.

show abstract

Characteristic Analysis of Partial Discharge of Free Metal Particle in GIS

Cited by 5 publications

References 8 publications

Influences of the vibration frequency and phase of the core of ultra-high voltage shunt reactors on suspended discharge in oil-paper insulation

Influences of the vibration frequency and phase of the core of ultra-high voltage shunt reactors on suspended discharge in oil-paper insulation

Simulation analysis on microscopic discharge characteristics of the bipolar corona of a floating conductor

Influences of the vibration frequency and phase of the core of ultra-high voltage shunt reactors on suspended discharge in oil-paper insulation

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