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SuperGrid Institute investigates the performance of different environmentally friendly insulating gases

2019-01-18T12:17:40+01:00September 27th, 2018|All, Press release|

As part of PROMOTioN, Super Grid Institute (France) investigates the performance of different environmentally friendly insulating gases

PhD Etienne OUSS “Characterization of Partial Discharges and Defect Identification in High-Voltage Direct Current GIS”

2018-10-08T14:41:48+02:00September 25th, 2018|All, High Voltage Substation Equipment, Phd|

This thesis aimed to characterize partial discharges in DC gas-insulated substations, and to develop an automatic defect identification tool. The first step of this work was the development of a partial discharge measuring bench. The complete study has been performed in a GIS section, so that the results can be directly applied to industrial equipment.

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

2019-07-03T14:18:42+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.

Repetitive short-circuit measurement on SiC MOSFET

2018-09-07T16:41:28+02:00September 7th, 2018|Conference, Power Electronics & Converters|

Robustness study for the 1.7 kV SiC MOSFET is presented. After evaluation of the critical energy required for failure, devices were submitted to repetitive short-circuits conditions.

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

2019-02-15T17:16:32+01:00September 6th, 2018|Power Electronics & Converters, Publications|

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.

Models of AC and DC cable systems for technical and economic evaluation of offshore wind farm connection

2019-01-10T10:06:53+01:00September 3rd, 2018|High Voltage Substation Equipment, HVDC Cable Systems, Publications|

Accurate cable modeling is a recurrent issue for electric architecture evaluation and design, especially in specific contexts, like offshore wind farms. This paper proposes optimal analytical cable models for the technical and economic assessment of offshore wind generation systems.

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