Small-signal stability analysis for the multi-terminal VSC MVDC distribution network; a review

The Journal of Engineering

Muhammad Shahzad¹  Girmaw T. Bitew¹  Peter M. Kamunyu¹  Ai Xin¹  Patrobers Simiyu¹  Wang Kunyu¹ 

[1] North China Electric Power University, State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources;

关键词: 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;   

DOI  :  10.1049/joe.2018.8842

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown