ELECTROMAGNETIC FIELD DISTRIBUTION IN VICINITY OF POWER LINES ABOVE REAL EARTH
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2010, Vol 34, Issue 34
Abstract
A method for electromagnetic field components calculation in vicinity of power lines is presented. The electromagnetic field distribution of 2x110 kV power line, which is commonly used in Serbian electric power system, is analysed. For determination of power line conductors influence on electromagnetic field, the complex ground return plane approach is applied. In that approach a return current flow in homogeneous earth was modelled by a perfect conducting plane located at a complex depth below the earth surface. An integral equation for potential is formed also, taken into account influences of currents and line charges induced on the power line tower. Solving that equation, the induced line charges on the power line tower can be determined and electromagnetic field distribution calculated. All results will be presented graphically. Especially will be considered influences of different parameters values on induced charge distribution along the tower. The charges and currents induced in tower have more relevant influence on the electric field than on the magnetic field distribution. That influence is noticed in close vicinity of power line. That distance is about 1/10 of tower height. In other areas that influence can be neglected. Obtained results will be compared with finite element method results.
Authors and Affiliations
Mirjana PERIC, Slavoljub ALEKSIC
Keywords
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