Novel control approach for a hybrid grid-forming HVDC offshore transmission system

Shangen Tian; David Campos-Gaona; Vinícius A. Lacerda; Raymundo E. Torres-Olguin; Olimpo Anaya-Lara

doi:10.3390/en13071681

Novel control approach for a hybrid grid-forming HVDC offshore transmission system

Shangen Tian^*, David Campos-Gaona, Vinícius A. Lacerda, Raymundo E. Torres-Olguin, Olimpo Anaya-Lara

^*Corresponding author for this work

Electronic And Electrical Engineering

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

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Abstract

This article describes a hybrid topology of high-voltage direct current (HVDC) for offshore wind farms using a series connection of a voltage source converter (VSC) and six-pulse diode rectifier (6P-DR). In this topology, the offshore side VSC (OF-VSC) acts as a grid-forming converter to maintain the PCC (point of common coupling) voltage of offshore wind farms (WF) and frequency. In addition, the OF-VSC functions as an active power filter to suppress the 5th, 7th, 11th, and 13th order harmonic current components produced by the 6P-DR, making it almost sinusoidal. Due to the 6P-DR being used in the hybrid converter, this new configuration reduces the total cost of the converters and losses, while preserving the power flow to the onshore gird. Compared to the fully-rated converter and hybrid converter based on a 12-pulse diode rectifier, the power loss and cost are reduced, and in addition, the proposed hybrid converter does not require a phase shift transformer nor a high number of diodes. A 200MWin an HVDC transmission system using the hybrid configuration was simulated in PSCAD. The results show that the system operated correctly and the harmonic components were filtered.

Original language	English
Article number	1681
Number of pages	14
Journal	Energies
Volume	13
Issue number	7
DOIs	https://doi.org/10.3390/en13071681
Publication status	Published - 3 Apr 2020

Funding

Funding: This work was funded in part by the São Paulo Research Foundation (FAPESP), (grant number 2018/10667-6).

Keywords

active power filter
hybrid HVDC converter topology
offshore wind energy
synchronous reference frame

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10.3390/en13071681Licence: CC BY 4.0

Tian-etal-Energies-2020-Novel-control-approach-for-a-hybrid-grid-forming-HVDCFinal published version, 2.73 MBLicence: CC BY 4.0

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title = "Novel control approach for a hybrid grid-forming HVDC offshore transmission system",

abstract = "This article describes a hybrid topology of high-voltage direct current (HVDC) for offshore wind farms using a series connection of a voltage source converter (VSC) and six-pulse diode rectifier (6P-DR). In this topology, the offshore side VSC (OF-VSC) acts as a grid-forming converter to maintain the PCC (point of common coupling) voltage of offshore wind farms (WF) and frequency. In addition, the OF-VSC functions as an active power filter to suppress the 5th, 7th, 11th, and 13th order harmonic current components produced by the 6P-DR, making it almost sinusoidal. Due to the 6P-DR being used in the hybrid converter, this new configuration reduces the total cost of the converters and losses, while preserving the power flow to the onshore gird. Compared to the fully-rated converter and hybrid converter based on a 12-pulse diode rectifier, the power loss and cost are reduced, and in addition, the proposed hybrid converter does not require a phase shift transformer nor a high number of diodes. A 200MWin an HVDC transmission system using the hybrid configuration was simulated in PSCAD. The results show that the system operated correctly and the harmonic components were filtered.",

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AU - Anaya-Lara, Olimpo

PY - 2020/4/3

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AB - This article describes a hybrid topology of high-voltage direct current (HVDC) for offshore wind farms using a series connection of a voltage source converter (VSC) and six-pulse diode rectifier (6P-DR). In this topology, the offshore side VSC (OF-VSC) acts as a grid-forming converter to maintain the PCC (point of common coupling) voltage of offshore wind farms (WF) and frequency. In addition, the OF-VSC functions as an active power filter to suppress the 5th, 7th, 11th, and 13th order harmonic current components produced by the 6P-DR, making it almost sinusoidal. Due to the 6P-DR being used in the hybrid converter, this new configuration reduces the total cost of the converters and losses, while preserving the power flow to the onshore gird. Compared to the fully-rated converter and hybrid converter based on a 12-pulse diode rectifier, the power loss and cost are reduced, and in addition, the proposed hybrid converter does not require a phase shift transformer nor a high number of diodes. A 200MWin an HVDC transmission system using the hybrid configuration was simulated in PSCAD. The results show that the system operated correctly and the harmonic components were filtered.

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Novel control approach for a hybrid grid-forming HVDC offshore transmission system

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