Study on the Influence Factors of Rod Plate Gap Corona Discharge Environment Based on <scp>UV</scp> Imaging

Wang, Shenghui; Li, Wei; Jiang, Tingyue; Niu, Leilei; Lv, Fangcheng; Li, Nan

doi:10.1002/tee.23266

Cited by 7 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When corona discharge and other discharge phenomena occur, energy release phenomena (i.e. the combination of electrons and positive ions to produce photons) take place, generating ultraviolet light [13]. The Luminar UV imager captures these UV signals, allowing for a preliminary assessment of the discharge strength [14].…”

Section: Introduction To Experimental Equipment and Construction Of E...mentioning

confidence: 99%

Structure Optimization for Downlead Cable of 110 kV Insulated Optical-Unit Phase Conductor

Liu,

Mei,

Luo

et al. 2024

Preprint

View full text Add to dashboard Cite

Currently, the structure of insulated optical-unit phase conductor (IOPPC) is gradually being employed in 10 kV and 110 kV power transmission lines, replacing the existing Optical Fiber Composition Phase Conductor (OPPC) structures. However, incidents of lines breakage have occurred in the widespread application of IOPPC downlead cables in 110 kV lines. Addressing these breakage incidents, this paper proposes a modified structure for the IOPPC downlead cable. Initially, finite element method is employed to calculate the electric field intensity of both the traditional and modified IOPPC downlead cable structures under a 110 kV voltage, providing preliminary validation of the effectiveness of the proposed modification. Subsequently, power frequency withstand tests are conducted to further validate and optimize the modified structure. Simulation results indicate that the electric field strength is notably higher in the air region near the parallel groove clamp of the traditional structure. The addition of a semiconductor shielding layer in the modified structure effectively suppresses the increase in electric field strength. Power frequency withstand test results further confirm the inhibitory effect of the semiconductor shielding layer on electric field intensity. However, experimental observations reveal occurrences of discharge at the cutoff point of the semiconductor shielding layer. Finally, optimization of the modified structure successfully eliminates the occurrence of discharge at the cutoff point of the semiconductor shielding layer. The final chapter showed the withstand voltage test specified by IEC standard for the IOPPC downlead cable with the structure of the hollow aluminum ball wrapping, confirming the effectiveness of the modified design.

show abstract

Section: Introduction To Experimental Equipment and Construction Of E...mentioning

confidence: 99%

Structure Optimization for Downlead Cable of 110 kV Insulated Optical-Unit Phase Conductor

Liu,

Mei,

Luo

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…The detection of corona-related defects in transmission lines has been included in the scope of defect detection work for transmission lines. In recent years, ultraviolet (UV) detection technology has been widely applied for the accurate, fast, visual, and safe detection of corona discharges in electrical equipment [4][5][6][7][8][9]. Some relevant studies [10][11][12][13] have been conducted on the corona inception voltage of conductors using ultraviolet detection technology.…”

Section: Introductionmentioning

confidence: 99%

Research on Ultraviolet Characteristic Parameters of DC-Positive Polarity Corona Discharge on Conductors

Dai,

Zhang,

Dong

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

The detection of corona-related defects in transmission lines has been included in the work of transmission line defect detection. Ultraviolet detection technology has gradually been widely applied in the field of corona discharge detection. However, the current research on the application of ultraviolet detection technology in transmission lines is relatively simple and mainly limited to using changes in the photon count to determine whether corona discharge has occurred. To address this, this study used a mini corona cage to simulate transmission lines and measured the changes in the photon count, spot area, and corona current in the corona inception process of different types of smooth, stainless-steel conductors. This study also investigated the variations in the photon count and spot area depending on conductor corona intensity, ultraviolet imager gain, and observation distance. The results show that the photon count and spot area can, to some extent, reflect the intensity of corona discharge. Both the photon count and spot area exhibited quadratic relationships with the voltage. As the observation distance increased, both the photon count and spot area showed exponential decay. The photon count exhibited a trend of initially increasing, then decreasing, and finally increasing again with the increase of gain, while the spot area showed exponential growth with increasing gain. The photon count and spot area can complement each other to identify and characterize the intensity of corona discharge.

show abstract

“…In terms of temperature and humidity research, these are representative: Dhali and Williams simulated the development process of nitrogen-positive flow in parallel plates [14]; Vitello simulated the development process of the negative flow of nitrogen in parallel plates [15]; Morrow and lowke simulated the development process of positive streamers in air [16]. For a uniform or slightly non-uniform field, air humidity has little effect on gap breakdown voltage [17]; for an extremely uneven field, most scholars believe that, under the influence of the electronegativity of water, the breakdown voltage increases slightly with the increase of humidity [18,19]. However, this is not entirely the case.…”

Section: Introductionmentioning

confidence: 99%

Effect of Environmental Parameters on Streamer Discharge in Short Air Gap between Rod and Plate

et al. 2022

View full text Add to dashboard Cite

Environmental meteorological parameters (temperature, humidity, air pressure, etc.) have an important impact on short gap streamer discharge. Based on the streamer theory and particle continuity equation of gas discharge, a short gap streamer discharge simulation model is established, and the influence of environmental parameters on the dynamic development process of streamer discharge is simulated and analyzed. The short gap air gap discharge characteristics were tested in a self-made gas discharge chamber. The results show that at low humidity (relative humidity <80%), with the increase of humidity, the electron density of the streamer channel increases, the field strength of the streamer head increases, the streamer development speed speeds up, and the gap breakdown voltage decrease; At higher humidity (relative humidity >80%), with the increase of humidity, the electron density of the streamer channel decreases, the field strength of the streamer head decreases, the development speed of the streamer slows down, and the gap breakdown voltage increase. With a decrease of gas pressure, the electron density of the streamer channel decreases, the field strength of the streamer head decreases, the development speed of the streamer increases, and the gap breakdown voltage decreases; The temperature change has little effect on the streamer development process.

show abstract

Study on the Influence Factors of Rod Plate Gap Corona Discharge Environment Based on UV Imaging

Cited by 7 publications

References 5 publications

Structure Optimization for Downlead Cable of 110 kV Insulated Optical-Unit Phase Conductor

Structure Optimization for Downlead Cable of 110 kV Insulated Optical-Unit Phase Conductor

Research on Ultraviolet Characteristic Parameters of DC-Positive Polarity Corona Discharge on Conductors

Effect of Environmental Parameters on Streamer Discharge in Short Air Gap between Rod and Plate

Contact Info

Product

Resources

About