Tapping Power from Overhead Guard Wire to Supply Telecommunication Site

Sometimes, high-voltage transmission lines passes from an area that there is impossible to build a distribution network, or building a substation is not cost-effective in that location. In this paper, a novel system is proposed that can be delivered the power via the overhead guard wire. The case study is a 400kV high-voltage transmission line with a Telecommunication site with low power consumption. In this proposed system, the electromagnetic induction of voltage of phase conductors on overhead guard wires is used to generate the power. In this case, one of the guard wires can be detached from the ground to use this induced voltage as a voltage source for feeding the loads. Since load voltage should remain relatively stable, an Inductance Variable Auto-Controle´e a` Entrefers (IVACE) regulator is used for this purpose. Different contingency conditions such as switching and short circuit are applied to evaluate the performance of the IVACE regulator. Simulations are carried out using Electromagnetic Transients Program (EMTP) software. Also, the impacts of the length of the detached overhead guard wires from the ground are investigated on the induced voltage. Moreover, the effect of the switching and short circuit on the output voltage is tested in the absence and presence of the regulator. The robustness and effectiveness of the proposed approach is verified through simulation study.