Voltage Selection Methodology for Power Lines HVDC

Any electric power system should maintain an energy equilibrium at every moment. This is the case for existing AC systems and will be the case for future High Voltage Direct Current (HVDC) grids based online-commutated converters (LCC) substations. In this paper, a new proposal to define the voltage in the HVDC is proposed with an analysis of the input data, the challenges, and limitations regarding the level range of the DC Voltage for interconnections between countries with special power lines parameters, power converters substations and cost balance. The case study evaluates the Interconnection Colombia - Panamá, the power line has considered the aspects related to the corona phenomenon in HVDC transmission lines according to the cable selection, substation back-to-back, submarine cable and losses; with 400–500 kV for 1700 km for 280 MW per pole or the same voltage for 950 km for 1500 MW per pole.