Open AccessFast compensation of DC bus voltage drops using modular multilevel converters
Author(s) -
Stark Christoph,
Danowski Dierk,
Marqués JoseLuis,
Hillermeier Claus
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8220
Subject(s) - converters , modular design , compensation (psychology) , voltage drop , grid , voltage , computer science , control theory (sociology) , millisecond , electrical engineering , current (fluid) , direct current , electronic engineering , engineering , control (management) , physics , mathematics , psychology , geometry , artificial intelligence , psychoanalysis , operating system , astronomy
For a DC grid using modular multi‐level converters (MMCs) fast control of the DC bus is an important requirement. A control design is presented where a sudden DC voltage drop is compensated without any influence on the AC side. Using a suitable pattern in the MMC internal circular currents, the DC current can be adjusted and the MMC can be brought to a new steady state with symmetrised arm energies within few milliseconds.