September 2018 - SuperGrid Institute

Analysis of the Lower Limit of Allowable Energy in Modular Multilevel Converters

Communications2019-07-03T14:18:42+02:00September 21st, 2018|Publications, Supergrid Architecture & Systems|

In this paper, a thorough analysis of the converter arm behavior is presented, which gives an analytic expression of the lower limit of the energy as a function of the converter operating point and the connected grid conditions. The relation between the lower energy limit and the operating power is analyzed by using the practical MMC specifications of an HVDC application. An experimental test of a small-scale MMC mock-up demonstrates the validity of the theoretical analysis.

Advanced Electrical characterisation of high voltage 4H-SiC PiN diodes

This paper reports the design, the processing, the static characterisation, the switching behaviour and the high current stress test of 10 kV aimed 4H-SiC bipolar diodes. The actual breakdown voltage of the selected devices is between 7 kV and 8 kV. The switching characterisations show a good behaviour with a t rr of only 90 ns. No degradation was observed after the application of 10 000 high current pulses during the stress tests.