Open AccessAnalysis of stable operation region of the hybrid AC/DC distribution systems
Author(s) -
Wu Ming,
Li Rui,
Yang Linze,
Gu Hanwen,
Wang Yueqi,
Jiao Zaibin
Publication year - 2020
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2019.1279
Subject(s) - controllability , converters , control theory (sociology) , grid , computer science , stability (learning theory) , power (physics) , electronic engineering , voltage , engineering , mathematics , electrical engineering , control (management) , physics , geometry , quantum mechanics , artificial intelligence , machine learning
Hybrid alternating current (AC)/direct current (DC) distribution is a promising technology emerging for future power systems owing to its advantages, such as high controllability and compatibility. The stability of grid‐connected converters is essential for the operation of an AC/DC distribution system. This study analyses the stable operation requirements of converters under different control modes based on the short‐circuit ratio (SCR). Then, a method to calculate the critical SCR (CSCR) of a specified converter is proposed. Based on the CSCR of each converter, the stability criterion to judge the stability of multi‐terminal DC (MTDC) distribution networks is proposed. To verify the accuracy and effectiveness of the proposed method and criterion, detailed electromagnetic simulations using PSCAD are conducted. The simulations indicate that the analysis results obtained using the proposed method and criterion are accurate, and the presented stable operation requirements of the converters can help to enhance the controllability of hybrid AC/DC distribution systems.