Hierarchical control implementation for meshed AC/multi-terminal DC grids with offshore windfarms integration

Akhter, F. and Bukhari, S. S. H. and Mangi, F. H. and Macpherson, D. E. and Harrison, G. P. and Bukhsh, W. and Ro, J. S. (2019) Hierarchical control implementation for meshed AC/multi-terminal DC grids with offshore windfarms integration. IEEE Access. ISSN 2169-3536

[img]
Preview
Text (Akhter-etal-IEEE-Access-2019-Hierarchical-control-implementation-for-meshed-AC-multi-terminal-DC-grids)
Akhter_etal_IEEE_Access_2019_Hierarchical_control_implementation_for_meshed_AC_multi_terminal_DC_grids.pdf
Final Published Version

Download (735kB)| Preview

    Abstract

    Although the integration of meshed multi-terminal direct current (MTDC) grids with the existing AC grid has some added economic advantages, significant challenges are encountered in such systems. One of the major challenges is ensuring secure and optimal operation of the combined AC/MTDC grid considering the stability requirements of AC and DC grids at different operating conditions. This paper presents the implementation of hierarchical control for the combined AC/MTDC grid. The hierarchical control is based on the well-established three-layered control of the AC power system, comprising primary, secondary, and tertiary controls. A set of appropriate control methods are proposed for the primary, secondary, and tertiary control layers to accomplish the identified requirements for secure and optimal operation of the combined AC/MTDC grid.