Abstract
In this work, a method to compute the radio interference (RI) lateral profiles generated by corona discharge in high voltage direct current (HVDC) transmission lines is presented. The method is based on a transmission line model that considers the skin effect, through the concept of complex penetration depth, in the conductors and in the ground plane. The attenuation constants are determined from the line parameters and the bipolar system is decoupled by using modal decomposition theory. As application cases, ±500 and ±600 kV bipolar transmission lines were analyzed. Afterwards, parametric sweeps of five variables that affect the RI levels are presented. Both the RI and the maximum electric field were calculated as a function of sub-conductor radius, bundle spacing, and the number of sub-conductors in the bundle. Additionally, the RI levels were also calculated as a function of the soil resistivity, and the RIV (radio interference voltage) frequency. Following this, vector optimization was applied to minimize the RI levels produced by the HVDC lines and differences between the designs with nominal and optimal values are discussed.
Highlights
High voltage direct current (HVDC) transmission systems are being studied and developed in several countries around the world
In Mexico and Turkey, the future installation of HVDC transmission lines is planned because of the advantages this kind of technology presents over HVAC transmission lines, mostly in energy transmission over long distances [1]
Vector optimization is applied in order to minimize the Radio interference (RI) levels produced by each of the two HVDC lines described in the previous section
Summary
High voltage direct current (HVDC) transmission systems are being studied and developed in several countries around the world. Madehave on test lines, empirical predictinggroups, the RI levels bipolar lines in have been These kinds of formulas are defined for fair weather conditions, and they depend on the developed by different researching groups, some of which are described in [5,9,10]. The empirical formulas mentioned gradient, conductor diameter, and the distance between the conductor and the measuring point Both above are onlymethods definedpresented for horizontal of bipolar lines. They do not consider the the analytical in [5]configurations and the empirical formulas mentioned above are only defined soil resistivity configurations which is a variable that affects.
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