Internal Balance during Low-Voltage-Ride-Through of the Modular Multilevel Converter STATCOM

Georgios Tsolaridis, Epameinondas Kontos, Sanjay K. Chaudhary, Pavol Bauer and Remus Teodorescu
Additional contact information
Georgios Tsolaridis: Department of Energy Technology, Aalborg University, 9220 Aalborg East, Denmark
Epameinondas Kontos: Department of Electrical Sustainable Energy, Delft University of Technology, 2628 CD Delft, The Netherlands
Sanjay K. Chaudhary: Department of Energy Technology, Aalborg University, 9220 Aalborg East, Denmark
Pavol Bauer: Department of Electrical Sustainable Energy, Delft University of Technology, 2628 CD Delft, The Netherlands
Remus Teodorescu: Department of Energy Technology, Aalborg University, 9220 Aalborg East, Denmark

Energies, 2017, vol. 10, issue 7, 1-18

Abstract: Grid faults are common in power systems and can have a severe impact on the operation of the converters in the system. In this paper, the operation of a Modular Multilevel Converter (MMC)-based Static Synchronous Compensators (STATCOM) is investigated during grid faults. The study focuses on the challenging internal control of the converter to allow the independent control of the energy levels of each arm, with the goal to maintain internal balancing of the MMC during contingencies. Extensive experimental results highlight the need for a sophisticated internal control. Moreover, the experimental analysis verifies that, by using the proposed control structure, the MMC can effectively ride through a fault on the AC side without tripping, while injecting the necessary positive and negative sequence reactive current levels according to the most recent grid codes.

Keywords: arm energy balance; circulating current controller; grid asymmetries; low-voltage ride-through; modular multilevel converter; STATCOM (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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