Impact of pole-to-pole DC voltage on energy requirement of FB YY-MMC
Paper in proceeding, 2023

The aim of this paper is to investigate the impact of pole-to-pole DC voltage on the energy requirements of a modular multilevel converter with full-bridge submodules (FB-MMC). With focus on energy-storage equipped FB-MMCs, the relation between the pole-to-pole voltage and the peak-to-peak energy variations in the MMC's arms is derived. Unlike MMC with half-bridge (HB) submodules (SM), in a FB-MMC the pole-to-pole DC voltage can be selected independently of the AC voltage; this allows for reduced energy requirements as well as lower number of FB SMs and capacitors for the same converter ratings. Furthermore, the impact of the converter's circulating current on the MMC's energy requirements is investigated. A guideline for the converter design is provided. Theoretical findings are validated via time-domain simulations.

grid-connected converter

high voltage power converters

energy requirement and losses estimation

submodule capacitor parameter design

Modular Multilevel Converters (MMC)

Author

Sohrab Mohtat

Chalmers, Electrical Engineering, Electric Power Engineering

Massimo Bongiorno

Chalmers, Electrical Engineering, Electric Power Engineering

Mebtu Bihonegn Beza

Chalmers, Electrical Engineering, Electric Power Engineering

Jan Svensson

Hitachi

2023 25th European Conference on Power Electronics and Applications, EPE 2023 ECCE Europe


9789075815412 (ISBN)

25th European Conference on Power Electronics and Applications, EPE 2023 ECCE Europe
Aalborg, Denmark,

Subject Categories

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.23919/EPE23ECCEEurope58414.2023.10264684

More information

Latest update

4/2/2024 9