Parallel Short-Circuits in three-level ANPC converters

Konferenz: PCIM Europe 2019 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
07.05.2019 - 09.05.2019 in Nürnberg, Deutschland

Tagungsband: PCIM Europe 2019

Seiten: 8Sprache: EnglischTyp: PDF

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Hammes, David; Werner, Robin; Eckel, Hans-Guenter (University of Rostock, IEF IEE LEA, Germany)
Krug, Dietmar (Siemens AG, PD LD AP PLM D, Germany)

The three-level Active-Neutral-Point-Clamped converter can suffer under novel short-circuit faults, the parallel ones. These scenarios consist of two concurrent circuits; the first one is comparable to typical single short-circuit failures with a lower stray inductance and the shorted module. The second circuit has two IGBTs and/or diodes, a freewheeling diode, the failed semiconductor, and higher parasitic inductance. These two paths interfere and change the well-known trajectories of normal short-circuits. The trends of the new parallel failures are investigated by measurements on a three-level converter equipped with 3.3 kV-IGBTs and diodes.