Browsing by Keyword "Multi-Terminal HVDC"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item Integral control of a Multi-Terminal HVDC-VSC transmission system(Institute of Electrical and Electronics Engineers Inc., 2017-05-30) Larrode, Marta Haro; Temez, Inigo Vidaurrazaga; Recio, Salvador Ceballos; Mugica, Maider Santos; Lopez, Pablo Eguia; Tecnalia Research & Innovation; SISTEMAS FOTOVOLTAICOS; POWER ELECTRONICS AND SYSTEM EQUIPMENT; POWER SYSTEMSThis paper proposes a control structure of a Multi-Terminal HVDC (MTDC) system employing Voltage Source Converters (VSC) technology. The study focuses on high-level control to keep DC voltage stable, mitigate oscillations due to the change in incoming power produced by contingencies in the AC grid and to provide the system with an adequate dynamic response [1]. Apart from this, controllers need to be validated in terms of HVAC grid compliance and for this purpose the UK National Grid Code will be used for verifying the fulfilment of frequency/voltage response and Low Voltage Ride-Through (LVRT). Thus, different tests will be performed considering the MTDC control objectives and the Grid Code compliance.Item Integration of offshore wind energy into an island grid by means of a Multi-Terminal VSC-HVDC network(Institute of Electrical and Electronics Engineers Inc., 2018-05-21) Haro-Larrode, Marta; Santos-Mugica, Maider; Etxegarai, Agurtzane; Eguia, Pablo; Tecnalia Research & Innovation; POWER SYSTEMSIn this paper, the connection of two offshore wind-farms to an island grid through a Multi-Terminal HVDC (MTDC) link is examined. The control strategy of the MTDC grid is validated against several adverse fault cases occurring at the island grid side. For this purpose an electrical grid model based on a medium size island is used to test the control structure of the MTDC link under faults such as voltage dips and frequency deviations. Simulation results are also presented thereby, pointing out interaction issues between control schemes of the MTDC and island grid. Thus, the participation of the MTDC network to increase the flexibility of the interconnected electrical system stands out in the present work.