TNEP of meshed HVDC grids: 'AC', 'DC' and convex formulations. Issue 24 (19th November 2019)

• Record Type: Journal Article
• Authors: Dave, Jay; Ergun, Hakan; An, Ting; Lu, Jingjing; Van Hertem, Dirk
• Is Part Of: IET generation, transmission & distribution. Volume 13:Issue 24(2019)
• Page Start: 5523
• Page End: 5532
• Publication Date: 2019-11-19
• Subjects: power grids -- HVDC power convertors -- power transmission planning -- HVDC power transmission -- convex programming; meshed HVDC grids -- convex formulations -- increased utilisation -- high‐voltage direct current -- power systems -- traditional ac grid -- transmission network expansion planning problem -- multiple HVDC links -- nonlinear formulation -- TNEP problem -- dc grids -- linear approximation -- second‐order cone convex relaxation -- presented formulations; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2019.0383
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : With the increased utilisation of high‐voltage direct current (HVDC) links in power systems, it is necessary to upgrade the traditional ac grid focused transmission network expansion planning (TNEP) problem to accommodate multiple HVDC links and even HVDC grids. This study proposes a non‐linear formulation for the TNEP problem of dc grids and derives two relaxations of the problem: the linear approximation, the second‐order cone convex relaxation as a branch flow model. The presented formulations allow both monopolar and bipolar configurations, and this as point‐to‐point connections and HVDC grids as expansion candidates. The three formulations are examined on various test cases and compared for their accuracy and computational speed.