Numerical assessment of ionized fields under HVDC lines

Abouelsaad, Mohamed M.; Shair, I.M. El; Ghariany, E.F.

doi:10.1109/iceec.2004.1374618

Cited by 3 publications

(10 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where E W0 is the mean electric field at w = zero and a assuming a linear relationship exists between E m and w, then C 1 = 3.62 in this case [1]. As it was observed that the minimum value of electrical field at different wind speeds always occur at the edge of the ROW for the wind range considered, then;…”

Section: Effect Of the Wind Speedmentioning

confidence: 74%

“…The wind speed is assumed to vary randomly, uniform, between 0 and 2.5m/s, as the wind influence seems to be more pronounced within this range [5]. It was observed, in an earlier study, that increased magnitudes of electric fields appear in the downwind side of the line [1,3,5]. Similar results were obtained for the current density.…”

Section: Effect Of the Wind Speedmentioning

confidence: 81%

“…It has been shown earlier that the conductor height has a significant influence on the electric field, and ion current density under dc power lines [1,7]. In the following, the height is considered to be the only random factor influencing the frequency of occurrence of E and J.…”

Section: Effect Of the Line Sagmentioning

confidence: 99%

“…With the growing need for electric energy, direct current has been, recently, established as an attractive economical and operational alternative for transmitting large bulks of electric power over extra long distances [1][2][3][4]. The ion-flow electrification phenomenon, caused by ionic conduction through the air and associated with dc power transmission lines, usually characterizes the potential biological impact of exposure to dc ionized fields [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…It is quite difficult to separate the effect of the above factors under HVDC lines, in outdoor studies, because their random changes are nearly accompanied by changes in the electric field and current density profiles under the lines [1][2][3]5]. Traditional assessment of the dc ionized field exposure problem may lead to the application of relatively large safety factors.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

An Integrated Approach for Probabilistic Assessment of Ionized Fields of HVDC Lines

Abouelsaad

Shair

Ghariany³

2006

The International Conference on Electrical Engineering

View full text Add to dashboard Cite

An integrated statistical approach, based on Monte Carlo simulation, is developed in this paper for probabilistic exposure assessment under HVDC transmission lines. The validity and adequacy of traditional, deterministic, models for HVDC ionized fields have been repeatedly questioned in literature. The present work recognizes the probabilistic nature of the exposure variables, electric field intensity and ion current density, and caters for their inherent uncertainties in order to simulate the realistic dc line environment. Randomness in the factors influencing the ionized field quantities is identified and accounted for, namely, the wind speed, the line sag, the corona onset gradient, and the location of objects under the line. Based on an overall probabilistic approach, the integrated influence of these factors on the exposure parameters is evaluated and assessed.

show abstract

Section: Effect Of the Wind Speedmentioning

confidence: 74%

Section: Effect Of the Wind Speedmentioning

confidence: 81%

Section: Effect Of the Line Sagmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An Integrated Approach for Probabilistic Assessment of Ionized Fields of HVDC Lines

Abouelsaad

Shair

Ghariany³

2006

The International Conference on Electrical Engineering

View full text Add to dashboard Cite

show abstract

Bibliography of HVDC 2004-2005 IEEE working group report

Varma¹,

Litzenberger²,

Auddy³

et al. 2006

2006 IEEE Power Engineering Society General Meeting

View full text Add to dashboard Cite

Application of Interval Methods to Uncertainty Analysis of HVDC Transmission Lines Fields

Abouelsaad

2006

The International Conference on Electrical Engineering

View full text Add to dashboard Cite

Uncertainty is a major issue facing electric utilities in planning and decision making. Modeling uncertainty can be based on two general approaches. The first is a probabilistic approach where probability distributions for all of the uncertainties are assumed. The second approach is called "Unknown but Bounded" in which upper and lower limits on the uncertainties are assumed without probability distributions. Interval mathematics provides a tool for the practical implementation and extension of the unknown but bounded concept. The calculation of HVDC transmission lines fields is used as an example to illustrate the use of interval mathematics. Ground-level electric field values are calculated using the traditional single point numbers as well as interval numbers. Various geometries for monopolar and bipolar dc lines are considered. The values from the two methods are compared to prove the validity of interval analysis to, practically, model uncertainties associated with HVDC transmission lines field analysis. Procedures devised to reduce the width of the resulting interval bounds either through rearranging the governing expressions or through derivation of interval probability are discussed.

show abstract

Numerical assessment of ionized fields under HVDC lines

Cited by 3 publications

References 6 publications

An Integrated Approach for Probabilistic Assessment of Ionized Fields of HVDC Lines

An Integrated Approach for Probabilistic Assessment of Ionized Fields of HVDC Lines

Bibliography of HVDC 2004-2005 IEEE working group report

Application of Interval Methods to Uncertainty Analysis of HVDC Transmission Lines Fields

Contact Info

Product

Resources

About