Insulated ground wire capacitive currents for tower discharge warning lamp supplying

In order to supply warning discharge lamps installed atop towers, the insulation of ground wires in HV and EHV can be used. The paper describes a simplified yet efficient matrix procedure which allows both to compute the capacitive induced voltages and to determine the equivalent circuit supplying such non-linear loads. In addition, the waveform of the conduction currents and voltages and the average power on the lamps are determined by a fast analytical procedure. The analytical results have been compared with laboratory experimental results giving a really good agreement.