Open AccessModelling of multi‐VSCs in DC voltage control timescale for small‐signal stability analysis
Author(s) -
Huang Yunhui,
Tang Aihong,
Xiong Binyu,
Huang Yong,
Tang Haiyan,
Li Yan
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0691
Subject(s) - control theory (sociology) , voltage source , grid , converters , voltage , stability (learning theory) , signal (programming language) , phase locked loop , computer science , small signal model , physics , control (management) , phase (matter) , mathematics , geometry , quantum mechanics , artificial intelligence , machine learning , programming language
This study investigates modelling of multi‐voltage source converters (VSCs) in DC voltage control timescale for small‐signal stability analysis. Multi‐VSCs stability in a DC voltage timescale is impacted due to the coupling among their control systems and grid dynamics. With considering control loops interactions and grid dynamics, multi‐VSCs’ small‐signal model is proposed for stability analysis. Control loops contain DC voltage control loop, terminal voltage control loop and phase‐locked loop. Furthermore, VSC control dynamics and grid dynamics are separated. Besides, eigenvalues analysis are conducted to analysis multi‐VSCs stability in DC voltage control timescale. Impacts of grid strength and control loops dynamics on the stability of multi‐VSCs are verified.