2026-04-17T05:40:26Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/1173462026-02-07T10:21:47Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Aragüés Peñalba, Mònica author Sau Bassols, Joan author Galceran Arellano, Samuel author Sumper, Andreas author Gomis Bellmunt, Oriol author 2018-10 This study focuses on the operation and control of HVDC multi-terminal systems that transmit the power being generated in offshore wind farms to the terrestrial AC grids. The aim of the paper is to propose and validate an algorithm to ensure optimal operation of HVDC-HVAC systems. This algorithm is implemented in a central controller that, knowing the electrical characteristics of the DC and AC systems, the power generation from the wind farms and the power demand, executes periodically an AC/DC Optimal Power Flow (OPF) and sends the appropriate voltage references to the grid side converter's control. The voltage control of the DC grid is distributed and based on droop law, implemented in grid side converters. The droop offset is modified periodically so as to adapt to the actual operating conditions and ensure optimal operation according to a specified objective function. Dynamic simulations show the system optimal operation in terms of loss minimization under wind speed changes, loss of communications and demand variation. These results are validated experimentally after implementing the control scheme in an HVDC scaled experimental platform. Dynamic simulations are also performed to show that the system can still be operated based on the proposed strategy even during contingencies implying the disconnection of a power system element (converter and DC cable). Postprint (author's final draft) Àrees temàtiques de la UPC::Energies Àrees temàtiques de la UPC::Energies::Energia eòlica Àrees temàtiques de la UPC::Energies::Energia eòlica::Parcs eòlics Àrees temàtiques de la UPC::Enginyeria elèctrica::Distribució d’energia elèctrica Wind power plants Electric power transmission Electric networks HVDC-HVAC OPF Distributed control Droop control Parcs eòlics Energia elèctrica--Transmissió Xarxes elèctriques Optimal operation of hybrid high voltage direct current and alternating current networks based on OPF combined with droop voltage control