Small‐signal stability analysis for the multi‐terminal VSC MVDC distribution network; a review. Issue 16 (7th December 2018)

• Record Type: Journal Article
• Authors: Simiyu, Patrobers; Xin, Ai; Bitew, Girmaw T.; Shahzad, Muhammad; Kunyu, Wang; Kamunyu, Peter M.
• Is Part Of: Journal of engineering. Volume 2019:Issue 16(2019)
• Page Start: 1068
• Page End: 1075
• Publication Date: 2018-12-07
• Subjects: power grids -- bifurcation -- stability -- eigenvalues and eigenfunctions -- power system stability -- power electronics -- distributed power generation -- fault location -- Lyapunov methods -- power distribution protection; small‐signal stability analysis -- multiterminal VSC MVDC distribution network -- stable operation -- terrestrial multiterminal -- medium voltage DC distribution network -- future universal DC grid -- power electronic based systems -- PEBS -- impedance‐based methods -- local stability analysis -- state‐space modelling‐eigenvalue analysis method -- global stability analysis -- Lyapunov linearisation method -- accurate small‐signal -- large‐signal stability study -- bifurcation analysis -- single small‐signal stability criterion -- suitable small‐signal stability approaches -- multiterminal MVDC distribution network -- low‐voltage DC systems -- high‐voltage DC systems; Engineering -- Periodicals; Engineering; Electronic journals; Periodicals; 620.005
• DOI: 10.1049/joe.2018.8842
• Languages: English
• ISSNs: 2051-3305

Abstract

Abstract : The stable operation and control of the proposed terrestrial multi‐terminal Voltage Source Converter (VSC) medium voltage DC (MVDC) distribution network is a remarkable motivation towards developing the future universal DC grid interconnecting the low voltage DC systems on one side and the high voltage DC systems on the other. The small‐signal stability analysis are important in designing these power electronic based systems (PEBS). In this study, small‐signal stability approaches for PEBS are reviewed with the aim of identifying suitable methods for the proposed MVDC distribution network. It is established that the impedance‐based methods are suitable for local stability analysis complementing very well with the state‐space modelling‐eigenvalue analysis method best for global stability analysis. The Lyapunov linearisation method offers simple, adaptable, and accurate small‐signal and large‐signal stability study. On the other hand, the bifurcation analysis is an emerging non‐linear approach with promising efficiency and precision. In conclusion, there is no single small‐signal stability criterion that encompass an acceptable level of accuracy, adaptability, and efficiency. Thus, the impedance‐based methods combined with state‐space modelling‐eigenvalue analysis, Lyapunov linearisation, and bifurcation theory can be suitable small‐signal stability approaches for the multi‐terminal MVDC distribution network.