Temperature Considerations for Online Health Monitoring of DC-Link Capacitors in Modular Multilevel Converters

QC 20220602Part of proceedings: ISBN 978-907581537-5
In this paper, the effect of temperature on online heath monitoring of dc capacitors in modular multilevel converters (MMCs) is studied. The submodule capacitance value is considered as the main indicator of health. Both self heating and ambient temperature are considered as sources of temperature variation. The study is conducted on a single phase MMC with full-bridge submodules. However, a similar analysis can be used for half-bridge MMCs and multiphase MMCs as well. The thermal behaviour of the capacitors is explained analytically and simulated using a simplified Cauer model. The effect of temperature on the estimated capacitance values is shown, and a method for reducing this effect is proposed. The results are verified using simulations in MATLAB/Simulink.

Nahalparvari, MehrdadKTH,Elkraftteknik(Swepub:kth)u1vh6d3p (författare)
Danielsson, ChristerHitachi ABB Power Grids, Master Ahls Gata 16, S-72212 Vasteras, Sweden (författare)
Nee, Hans-Peter,1963-KTH,Elkraftteknik(Swepub:kth)u1ycw7mc (författare)
KTHElkraftteknik (creator_code:org_t)

Ingår i:2021 23rd European Conference on Power Electronics and Applications, EPE 2021 ECCE Europe: Institute of Electrical and Electronics Engineers Inc.

Av författaren/redakt...: Asoodar, Mohsen; Nahalparvari, Me ...; Danielsson, Chri ...; Nee, Hans-Peter, ...

Om ämnet

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Elektroteknik oc ...; och Annan elektrotek ...

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.