Open AccessFeasibility of fast restoration of power systems by micro‐grids
Author(s) -
Zhao Zhiqi,
Ooi BoonTeck
Publication year - 2018
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2017.0323
Subject(s) - electric power transmission , overvoltage , grid , steam turbine , power (physics) , turbine , transmission (telecommunications) , computer science , transmission line , electrical engineering , line (geometry) , power grid , automotive engineering , engineering , mechanical engineering , voltage , physics , geometry , mathematics , quantum mechanics
This study shows that with fast and flexible power electronic converter interfaces, micro‐grids can quickly re‐energise blacked‐out transmission lines without overvoltage. After the transmission lines are re‐energised, micro‐grids can speed up (i) the reconnections of generators and loads; (ii) the re‐synchronisation of severed transmission line sections back to the original grid. Micro‐grids have active power to energise auxiliary motors of large thermal plants in black start. Faster restoration is limited by steam‐turbine plants because they cannot be speeded up beyond thermodynamic constraints.