Capability curves of a VSC-HVDC connected to a weak AC grid considering stability and power limits

Agustí Egea-Alvarez; Carl Barker; Fainan Hassan; Oriol Gomis-Bellmunt

doi:10.1049/cp.2015.0091

Capability curves of a VSC-HVDC connected to a weak AC grid considering stability and power limits

Agustí Egea-Alvarez, Carl Barker, Fainan Hassan, Oriol Gomis-Bellmunt

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

10 Citations (Scopus)

Abstract

The connection point of a VSC-HVDC for the transmission of RES electricity, can be located far from the large generation plants, leading to a weak grid connection. This paper analyses the limitations on the power flow transfer through a VSCHVDC system connected to a weak grid. First, the impact of the angle and voltage stability limits and the VSC rating are examined. Then, the power transfer capability curves of a VSC connected to a weak grid of an SCR of 1.1 pu by means of an L-interface are calculated. Finally, the impact of providing additional reactive power (Q) support is investigated through utilising a capacitor at the connection point. It has been shown that an additional Q-support of 0.2 pu can maintain the transfer of full power without the need for oversizing the VSC.

Original language	English
Title of host publication	AC and DC Power Transmission, 11th IET International Conference on
Publisher	Institution of Engineering and Technology
Number of pages	5
Volume	2015
Edition	CP654
ISBN (Print)	9781849199827
DOIs	https://doi.org/10.1049/cp.2015.0091
Publication status	Published - 13 Jul 2015
Externally published	Yes
Event	11th IET International Conference on AC and DC Power Transmission - Birmingham, United Kingdom Duration: 10 Feb 2015 → 12 Feb 2015 http://conferences.theiet.org/acdc/index.cfm

Conference

Conference	11th IET International Conference on AC and DC Power Transmission
Country	United Kingdom
City	Birmingham
Period	10/02/15 → 12/02/15
Internet address	http://conferences.theiet.org/acdc/index.cfm

Keywords

capability curves
short circuit ratio (SCR)
VSC-HVDC
weak grids

Access to Document

10.1049/cp.2015.0091

Link to publication in Scopus

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Cite this

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abstract = "The connection point of a VSC-HVDC for the transmission of RES electricity, can be located far from the large generation plants, leading to a weak grid connection. This paper analyses the limitations on the power flow transfer through a VSCHVDC system connected to a weak grid. First, the impact of the angle and voltage stability limits and the VSC rating are examined. Then, the power transfer capability curves of a VSC connected to a weak grid of an SCR of 1.1 pu by means of an L-interface are calculated. Finally, the impact of providing additional reactive power (Q) support is investigated through utilising a capacitor at the connection point. It has been shown that an additional Q-support of 0.2 pu can maintain the transfer of full power without the need for oversizing the VSC.",

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Egea-Alvarez, A, Barker, C, Hassan, F & Gomis-Bellmunt, O 2015, Capability curves of a VSC-HVDC connected to a weak AC grid considering stability and power limits. in AC and DC Power Transmission, 11th IET International Conference on. CP654 edn, vol. 2015, Institution of Engineering and Technology, 11th IET International Conference on AC and DC Power Transmission, Birmingham, United Kingdom, 10/02/15. https://doi.org/10.1049/cp.2015.0091

Capability curves of a VSC-HVDC connected to a weak AC grid considering stability and power limits. / Egea-Alvarez, Agustí; Barker, Carl; Hassan, Fainan; Gomis-Bellmunt, Oriol.

AC and DC Power Transmission, 11th IET International Conference on. Vol. 2015 CP654. ed. Institution of Engineering and Technology, 2015.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

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