Open AccessDC current bus distributed power system and its stability analysis
Author(s) -
Wei Yuqi,
Luo Quanming,
Chen Si,
Huang Jian,
Zhou Luowei
Publication year - 2019
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2018.5533
Subject(s) - converters , transient (computer programming) , electrical impedance , stability (learning theory) , power (physics) , electric power system , small signal model , electronic engineering , voltage , control theory (sociology) , signal (programming language) , computer science , engineering , electrical engineering , physics , control (management) , quantum mechanics , machine learning , artificial intelligence , programming language , operating system
DC distributed power systems (DPSs) have attained much attention because of its characteristics of high efficiency, high power density and flexible configuration. However, when converters are interconnected in a system, adverse interactions may occur due to the converter sensitivity to the external impedance, these interactions may degrade converters transient performance or cause stability issues. Currently, research mainly focuses on DPS with a DC voltage bus, including stability analysis and approaches to improve system stability. This study is to establish stability criteria for DPS with a DC current bus. Firstly, basic current type DC/DC converters and their small signal models are introduced. Then, the current bus DPS is derived, discussed, and the stability criteria are obtained by using two‐port small signal model. The proposed criteria are verified by comparing the results of theoretical calculations and simulations. Finally, an experimental prototype is built to validate the theoretical analysis and simulation.