Determination of the corona inception voltage in an extra high voltage substation connector

Hernandez-Guiteras, Joan; Riba, Jordi-Roger; Torrens, Pau Casals

doi:10.1109/tdei.2013.6451344

Cited by 20 publications

(15 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The electrostatic simulation does not consider the local effect of charges that make up the dielectric although it specifically determines the presence of the corona effect. This is why in this study, these charges are analysed applying the reference methodology as established by Pedersen [17] for non-uniform electric fields, which is also used for connectors in [19]. However, in comparison, the present study broadens the description of how to theoretically calculate such a line, additionally exposing the drawbacks with respect to the theory of streamers formation [4].…”

Section: Calculation Of the Critical Field Line: According Tomentioning

confidence: 98%

“…The input parameter to that methodology is the ionisation coefficient, which averages the discrete nature of the formation of ions and electrons in a gas. The ionisation coefficient is dependent on the electric field point-to-point through a critical path between the electrodes and the nearest grounded surface [19]. Therefore, the calculation of the electric field will be a necessary step for the analysis of the corona effect.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact assessment of clearance in corona testing for a high‐voltage substation connector set using FEM

Hoz

Etxegarai

Larrea

et al. 2020

IET Generation, Transmission & Distribution

View full text Add to dashboard Cite

Section: Calculation Of the Critical Field Line: According Tomentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Impact assessment of clearance in corona testing for a high‐voltage substation connector set using FEM

Hoz

Etxegarai

Larrea

et al. 2020

IET Generation, Transmission & Distribution

View full text Add to dashboard Cite

“…It is already known that the generation of corona depends on several causes, including electrode geometry, spatial factors, and surface contamination. Therefore, important parameters influencing corona appearance are the geometrical radius of the surface [3,4], as well as surface condition and roughness [5]. Small radii geometries and configurations with sharp points or edges are more prone to corona occurrence due to the concentration of the electric field lines [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Corona Performance of Aged Sand-Cast Substation Connectors

et al. 2020

Self Cite

View full text Add to dashboard Cite

Substation connectors, like many other high-voltage products, are tested once manufactured. However, the corona behavior of aged specimens can differ from that exhibited by newer ones, thus generating detrimental technical and environmental effects. Manufacturers need to know the long-term corona behavior of substation connectors to offer their customers maximum safety and transparency about such critical products. This paper analyzes the ageing effect on the surface roughness and the visual corona extinction voltage of sand-cast aluminum connectors, which were artificially aged in a salt spray chamber for different periods. The experimental results show an important variability of the surface roughness and corona extinction voltage (CEV) among connectors with the same ageing level due to the sand-casting manufacturing process. The results in this paper also show a slight increase in the surface roughness with the ageing period, although there is not a clear pattern between the applied ageing level and the experimental CEV value. It is concluded that the inherent variability among connectors due to the sand-cast process has more influence than the ageing effect itself.

show abstract

“…Extra-high voltage (EHV) and ultra-high voltage (UHV) power lines are the required means for transmitting large amounts of power over very long distances. However, due to the high voltage levels corona effects are increased [16,17]. Different high-altitude high-voltage tests were conducted in the United States during the 1950s and 1960s [18][19][20] driven by the need to construct transmission lines crossing high-altitude regions.…”

Section: Introductionmentioning

confidence: 99%

Voltage Correction Factors for Air-Insulated Transmission Lines Operating in High-Altitude Regions to Limit Corona Activity: A Review

Riba

Larzelere²,

Rickmann

2018

Energies

Self Cite

View full text Add to dashboard Cite

Nowadays there are several transmission lines projected to be operating in high-altitude regions. It is well known that the installation altitude has an impact on the dielectric behavior of air-insulated systems. As a result, atmospheric and voltage correction factors must be applied in air-insulated transmission systems operating in high-altitude conditions. This paper performs an exhaustive literature review, including state-of-the-art research papers and International Standards of the available correction factors to limit corona activity and ensure proper performance when planning air-insulated transmission lines intended for high-altitude areas. It has been found that there are substantial differences among the various correction methods, differences that are more evident at higher altitudes. Most high-voltage standards were not conceived to test samples to be installed in high-altitude regions and, therefore, most high-voltage laboratories are not ready to face this issue, since more detailed information is required. It is proposed to conduct more research on this topic so that the atmospheric corrections and altitude correction factors found in the current International Standards can be updated and/or modified so that high-voltage components to be installed in high-altitude regions can be tested with more accuracy, taking into account their insulation structure.

show abstract

Determination of the corona inception voltage in an extra high voltage substation connector

Cited by 20 publications

References 29 publications

Impact assessment of clearance in corona testing for a high‐voltage substation connector set using FEM

Impact assessment of clearance in corona testing for a high‐voltage substation connector set using FEM

Experimental Study of the Corona Performance of Aged Sand-Cast Substation Connectors

Voltage Correction Factors for Air-Insulated Transmission Lines Operating in High-Altitude Regions to Limit Corona Activity: A Review

Contact Info

Product

Resources

About