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 |
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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 | |
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 |
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Country | United Kingdom |
City | Birmingham |
Period | 10/02/15 → 12/02/15 |
Internet address |
Keywords
- capability curves
- short circuit ratio (SCR)
- VSC-HVDC
- weak grids