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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS)
Almurib, Haider A.F.
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Control & Systems Engineering Electrical & Electronics Engineering

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Modular multilevel converter (MMC) based STATCOM with vector control and virtual impedance voltage compensations Lawan, Abdurrahman Umar; Almurib, Haider A.F.; Khor, Jeen G.
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 10, No 4: December 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (659.696 KB) | DOI: 10.11591/ijpeds.v10.i4.pp1833-1851

Abstract

This paper presents modular multilevel converter (MMC) with circulating current control which provides an improved balanced capacitors voltages. The control is achieved by employing compensation techniques in the external and internal controls of the MMC based static compensator (STATCOM). Performance variations arise during STATCOM non-ideal operation with grid externally and during capacitors voltage transients due to charging and discharging within the MMC that result in the emergence of a voltage disturbance. The proportional integral (PI) controller is usually employed in the external and internal controls for a fast response and reactive current control. In this paper, the performance of the PI controller is improved using voltage compensation in the external control and virtual impedance in the capacitor voltage control within a five-level MMC. The proposed control minimizes the variations in the STATCOM operations with the grid and within the MMC to provide an enhanced overall system response.
Co-Authors Khor, Jeen G. Lawan, Abdurrahman Umar