Analytical Derivation of the DC-Side Input Admittance of the Direct-Voltage Controlled Modular Multilevel Converter
Journal article, 2017

The input admittance of a converter, connected to other dynamic subsystems, is a useful tool to investigate whether poorly damped oscillations or even unstable conditions might occur at certain frequencies. This is of interest in applications employing the modular multilevel converter (MMC), where the internal dynamics of the converter and the increased number of control loops greatly affect the MMC’s dynamic behaviour, compared to other types of converters. In this paper, the dc-side input admittance of the direct-voltage controlled MMC is derived analytically and verified via small-signal perturbation in a detailed nonlinear time-domain simulation model. The MMC’s input admittance is parametrically studied and compared to the dc-side input admittance of an equivalent two-level converter.

HVDC POWER CONVERTERS

HVDC POWER TRANSMISSION

DC-AC POWER CONVERTORS

STABILITY

FREQUENCY-DOMAIN ANALYSIS

MODELLING

Author

Georgios Stamatiou

Chalmers, Energy and Environment, Electric Power Engineering

Mebtu Bihonegn Beza

Chalmers, Energy and Environment, Electric Power Engineering

Massimo Bongiorno

Chalmers, Energy and Environment, Electric Power Engineering

Lennart Harnefors

Royal Institute of Technology (KTH)

ABB Corporate Research Center

IET Generation, Transmission and Distribution

1751-8687 (ISSN) 1751-8695 (eISSN)

Vol. 11 16 4018-4030

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1049/iet-gtd.2017.0278

More information

Latest update

2/26/2018