A series flywheel architecture for power levelling and mitigation of DC voltage transients in multi-terminal HVDC grids

Islam Azmy Gowaid, Ahmed Abbas Elserougi, Ayman Abdel-Khalik, Ahmed Mohamed Massoud, Shehab Ahmed

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

This study proposes a new architecture of flywheel energy storage system (FESS) which can be implemented at generating unit (GU) level (e.g. wind turbine) or scaled up for application in grid-side converter (GSC) stations of a multiterminal direct current (MTDC) system. The proposed architecture suppresses DC voltage leaps under grid faults, and performs power levelling duty at grid connection points. When implemented at GU level, the proposed FESS features a doubly-fed induction machine (DFIM) - the flywheel machine - where its six stator winding terminals are connected in series between the grid and the GSC. The flywheel converter is of partial power rating, and is connected to the DFIM rotor. When employed at an MTDC GSC station, several submodules are connected to build an FESS station. The study proposes the control concept and the general topology of the FESS station. The performance parameters of the system are tested under normal and abnormal operating conditions. Results and analyses indicate smooth dynamic operation, the economic advantage and the improved fault ride-through capability because of the proposed system.

Original languageEnglish
Pages (from-to)1951-1959
Number of pages9
JournalIET Generation, Transmission and Distribution
Volume8
Issue number12
DOIs
Publication statusPublished - 1 Dec 2014

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ASJC Scopus subject areas

  • Control and Systems Engineering
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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