Classification and analysis of impact on small-signal dynamics and stability from expansion of VSC-HVDC systems to multiterminal HVDC grids

• Published in: 13th IET International Conference on AC and DC Power Transmission (ACDC 2017) p. 50
• Main Authors: D'Arco, S, Beerten, J, Suul, J.A
• Format: Conference Proceeding
• Language: English
• Published: Stevenage, UK IET 2017; The Institution of Engineering & Technology
• Subjects: Converters; d.c. transmission; Dynamic stability; Eigenvalues; Factor analysis; Impact analysis; Power system control; Stability analysis; power system stability; VSC-HVDC system expansion; multiterminal HVDC grid; small-signal dynamics; point-to-point HVDC connection; three-terminal radial configuration; small-signal stability; power grids; high-voltage DC transmission system; participation factor analysis; HVDC power transmission
• ISBN: 9781785614217; 1785614215
• DOI: 10.1049/cp.2017.0050

This paper presents a structured approach for analysing the effect of HVDC transmission system expansion on the small signal dynamics. The methodology decomposes the expansion of the system into a sequence of steps and aims especially at identifying the eigenvalues associated with interactions between the initial system and an added converter terminal. The procedure is illustrated with an example of expanding a point-to-point HVDC connection to a three-terminal radial configuration. The modes highlighted as responsible for the interactions between the initial system and the added third terminal are compared to the interaction modes identified by participation factor analysis. The presented results demonstrate that these two approaches present an excellent correlation and reveal complementary information.