Abstract
This paper presents a voltage control for an offshore load fed by a Multi-Terminal VSC-HVDC transmission system (MT-HVDC). The studied system is composed by two GSCs (Grid Side Converters) and one OSC (Offshore Side Converter). The objective is to maintain the amplitude and frequency of the AC voltage constant at the offshore terminal with a minimum overshoot. A vector control strategy including a current control loop and a voltage control loop is proposed for the OSC and also LQG (Linear-Quadratic-Gaussian) compensator is employed to improve the voltage response of offshore load. The performance of this controller is validated using simulation in MATLAB/SIMULINK software for three operating conditions: normal operation, no-load and start-up of the offshore load. Simulation results illustrate that the AC voltage of load can be governed at its nominal value and MT-HVDC system linked to the offshore load with the proposed controller is able to provide a reliable dynamic operation and a desirable voltage quality during load variations.
| 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 | 9 |
| Volume | 2015 |
| Edition | CP654 |
| ISBN (Print) | 9781849199827 |
| DOIs | |
| Publication status | Published - 13 Jul 2015 |
| 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/Territory | United Kingdom |
| City | Birmingham |
| Period | 10/02/15 → 12/02/15 |
| Internet address |
Keywords
- multi-terminal VSC-HVDC transmission (MT-HVDC)
- offshore load
- vector control strategy
- voltage source converter (VSC)