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Design considerations for the 2- phase cooling system of a 5 MW MVDC converter

Communications2021-08-11T16:57:57+02:00October 11th, 2018|Electronique de puissance & convertisseurs, Publications|

This presentation will provide an update on our current project: designing a cooler for a high power (5 MW) MVDC converter for offshore wind turbines applications. A number of constraints are imposed, mainly related to a limited volume, environmental, safety and health regulations, and of course cooling performance. Indeed, as we presented last year (ATW 2017), the silicon carbide power semiconductors used in this converter should operate at a junction temperature lower than 100 °C for better efficiency.

CIGRE Young Members organizing a visit at SuperGrid Institute

Communications2021-08-11T16:30:53+02:00October 8th, 2018|Evenement|

Once a year, CIGRE young members France, organizes industrial, onsite visits where academics, engineers and experts can share and discuss with scholars. This year, SuperGrid Institute has accepted to host this meeting on our premises on the 18th of October 2018.

Measurement and Analysis of SiC-MOSFET threshold voltage shift

Communications2021-08-11T17:37:46+02:00October 4th, 2018|Conference, Electronique de puissance & convertisseurs|

Gate-oxide technology weakness is a main reliability issue of Silicon Carbide MOSFET transistors. The threshold voltage shift is a critical phenomenon that addresses the reliability of industrial power applications. It is important to have a better understanding of the phenomena implied in the gate threshold voltage shift. In this context, HTGB test is proposed and the resulting gate oxide stress is studied and discussed in this paper.

SuperGrid Institute investigates the performance of different environmentally friendly insulating gases

Communications2021-08-11T17:23:40+02:00September 27th, 2018|Comuniqué de presse, Tout|

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

AC Grid Forming by Coordinated Control of Offshore Wind Farm connected to Diode Rectifier based HVDC Link-Review and Assessment of Solutions

Communications2024-10-09T10:38:31+02:00September 26th, 2018|Tout|

This paper reviews a few of the major control solutions for AC grid forming and operation of DR-HVDC based OWFs. Then these solutions are compared based on their approach in solving the major challenges involved.

AC Grid Forming by Coordinated Control of Offshore Wind Farm connected to Diode Rectifier based HVDC Link-Review and Assessment of Solutions

Communications2021-08-11T16:58:06+02:00September 26th, 2018|Architecture & systèmes du supergrid, Publications|

This paper reviews a few of the major control solutions for AC grid forming and operation of DR-HVDC based OWFs. Then these solutions are compared based on their approach in solving the major challenges involved.

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

Communications2021-08-11T17:42:53+02:00September 25th, 2018|Appareillage électrique haute tension, Phd, Tout|

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

Communications2024-10-09T10:36:21+02:00September 21st, 2018|Architecture & systèmes du supergrid, Publications|

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

Communications2021-08-11T17:37:53+02:00September 7th, 2018|Conference, Electronique de puissance & convertisseurs|

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.

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

Communications2024-10-09T10:42:23+02:00September 3rd, 2018|Tout|

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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