Open AccessFault discrimination and protection coordination for a bipolar full‐bridge MMC‐HVDC scheme
Author(s) -
Wenig Simon,
Goertz Max,
Heinisch Mike,
Suriyah Michael,
Leibfried Thomas
Publication year - 2018
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.0227
Subject(s) - modular design , converters , fault (geology) , computer science , scheme (mathematics) , transmission (telecommunications) , realization (probability) , electronic engineering , transmission system , differential (mechanical device) , power (physics) , bridge (graph theory) , high voltage direct current , software , voltage , engineering , direct current , electrical engineering , telecommunications , mathematics , mathematical analysis , medicine , seismology , geology , aerospace engineering , operating system , quantum mechanics , programming language , statistics , physics
Fault discrimination and protection design for bipolar high‐voltage direct current transmission solutions based on modular multilevel converters (MMC‐HVDC) links are of significant importance for a reliable and resilient power transmission. If full‐bridge submodules are utilised, fault‐dependent handling concepts considering the location of an event are enabled. This study presents a comprehensive approach to differentiate and deal with internal converter and dc side faults. While a multitude of measurements inside and at the clamps of each converter is usually only used for simple threshold‐based hardware‐related protection, additional differential and derivative criteria may further improve selectivity. However, this requires careful configuration to avoid improper reactions. To highlight the coordinated manner of the proposed concept, various faults are analysed and selected examples are explicitly investigated and visualised using the PSCAD EMTDC software.