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Design and Development of Modular Multilevel Converter for Solid State Transformer Application

Lookup NU author(s): Nasiru Kadandani, Dr Mohamed Dahidah, Dr Salaheddine Ethni



This is the final published version of an article that has been published in its final definitive form by Faculty of Engineering, Bayero University, 2021.

For re-use rights please refer to the publisher's terms and conditions.


Unlike conventional line frequency transformer (LFT), solid state transformer (SST) is a power electronic device con-sisting of one or more converters that are based on semiconductor switches. However, the two-level and three-level voltage source converters (VSCs) used in SST lack scalability to higher voltage levels. This paper proposes a modular multilevel converter (MMC) based SST which allows the output voltage level to be varied without complexing the circuit. The proposed MMC based SST including the control method was validated in a detailed model of MMC with 20 SMs per arm in MATLAB® using Simulink® and PLECS® toolboxes. Experimental results are also presented on a scaled down laboratory prototype which validate the effectiveness of the proposed model. Simulation and experi-mental results show that multilevel voltage waveform can be conceived by adding more cells to the arms, thus allowing scalability to higher voltage and power levels.

Publication metadata

Author(s): Kadandani NB, Dahidah MSA, Ethni S

Publication type: Article

Publication status: Published

Journal: Bayero Journal of Engineering and Technology

Year: 2021

Volume: 16

Issue: 1

Pages: 31-41

Print publication date: 01/02/2021

Online publication date: 30/12/2020

Acceptance date: 15/11/2020

Date deposited: 04/02/2021

ISSN (print): 2449-0539

Publisher: Faculty of Engineering, Bayero University