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Control of the Parallel Operation of DR-HVDC and VSC-HVDC for Offshore Wind Power Transmission.

Authors :
Nami, Ashkan
Rodriguez-Amenedo, Jose Luis
Arnaltes, Santiago
Cardiel-Alvarez, Miguel Angel
Baraciarte, Roberto Alves
Source :
IEEE Transactions on Power Delivery; Jun2022, Vol. 37 Issue 3, p1682-1691, 10p
Publication Year :
2022

Abstract

This paper presents a control of the parallel operation of diode rectifier based high-voltage direct current (DR-HVDC) and voltage source converter based HVDC (VSC-HVDC) links. The two links are connected to offshore wind farms (OWFs). The VSC-HVDC controls the voltage and frequency of the offshore AC-grid needed for the OWFs start-up. The proposed grid forming control is based on controlling the OWFs voltage by controlling the active power balance at the VSC-HVDC AC-bus. When the OWFs inject more power than a certain active power reference established for the VSC-HVDC, the OWFs voltage increases and the DR-HVDC starts conducting. Then, the offshore voltage automatically accommodates the required value for transmitting the OWFs power through the DR-HVDC link while the system frequency is controlled by the VSC-HVDC through satisfying the reactive power balance. The power transmitted through the VSC-HVDC can be set by adjusting the corresponding power command while the DR-HVDC will automatically close the power balance. The main advantage of the proposed control system is that the VSC-HVDC can be sized just to support the system energization; while once the OWFs are in operation, the DR-HVDC will be loaded automatically. Simulation results verify the proposed control system. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
08858977
Volume :
37
Issue :
3
Database :
Complementary Index
Journal :
IEEE Transactions on Power Delivery
Publication Type :
Academic Journal
Accession number :
157073157
Full Text :
https://doi.org/10.1109/TPWRD.2021.3095529