Multi-Period Transmission Expansion Planning for Renewables-Rich Power Grid Enabling Transfer Capacity Enhancement of Hybrid AC/DC Interface

With the increasing integration of HVDC tie-lines, regional power systems in both energy-exporting area and energy-importing have been gradually evolving into “strong DC, weak AC” systems. In this paper, a multi-period transmission expansion planning optimization model is proposed for an grid with hybrid AC/DC interface. While existing literature has not considered dynamic security problem TEP, paper adopts conventional total transfer capacity (TTC) index to evaluate limit interface under different schemes. Multiple objectives are reduce investment cost while promoting consumption renewables by enhancing The non-dominated sorting genetic algorithm-II (NSGA-II) used compute optimal solution multi-objective problem. A case study on modified IEEE 39-bus system presented demonstrate effectiveness method.