Primary and secondary power control of multiterminal HVDC grids

• Published in: 10th IET International Conference on AC and DC Power Transmission (ACDC 2012) p. P09
• Main Authors: Egea-Alvarez, A, Beerten, J, Van Hertem, D, Gomis-Bellmunt, O
• Format: Conference Proceeding
• Language: English
• Published: Stevenage, UK IET 2012; The Institution of Engineering & Technology
• Subjects: Control of electric power systems; d.c. transmission; Power and energy control; Power convertors and power supplies to apparatus; Voltage control; power reference change; HVDC power convertors; power flow control; primary control; load flow control; secondary control; operation points; grid side converter disconnection; tertiary control; multiterminal HVDC grids; power control; hierarchical control structure; voltage control
• ISBN: 1849197008; 9781849197007
• DOI: 10.1049/cp.2012.1989

The article introduces a hierarchical control structure for Multiterminal High Voltage Direct Current (M-HVDC) systems. The presented hierarchy is similar to the control structure of the classical AC systems divided in primary, secondary and tertiary control. The design and interaction between the secondary, or power control, and the primary controllers, or voltage control, are discussed. Furthermore, the operation characteristics and operation points are commented. Some scenarios have been simulated in order to test and verify the proposed method including a power reference change and a grid side converter disconnection. (6 pages)