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