TY - JFULL AU - Juan P. Novoa and Mario A. Rios PY - 2017/1/ TI - Conversion of HVAC Lines into HVDC in Transmission Expansion Planning T2 - International Journal of Energy and Power Engineering SP - 1189 EP - 1196 VL - 11 SN - 1307-6892 UR - https://publications.waset.org/pdf/10008249 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 132, 2017 N2 - This paper presents a transmission planning methodology that considers the conversion of HVAC transmission lines to HVDC as an alternative of expansion of power systems, as a consequence of restrictions for the construction of new lines. The transmission expansion planning problem formulates an optimization problem that minimizes the total cost that includes the investment cost to convert lines from HVAC to HVDC and possible required reinforcements of the power system prior to the conversion. The costs analysis assesses the impact of the conversion on the reliability because transmission lines are out of service during the conversion work. The presented methodology is applied to a test system considering a planning a horizon of 10 years. ER -