Architecture & systèmes du supergrid
“Pour réussir la transition énergétique, les réseaux électriques doivent avoir la capacité d’intégrer massivement des énergies renouvelables, via des composants en courant continu (DC). SuperGrid Institute met à disposition son expertise pour développer les technologies et les méthodes d’analyse associées afin de garantir le bon fonctionnement des réseaux AC et DC interconnectés.“
Jean-Baptiste HEYBERGER, Directeur du département Architecture & systèmes du supergrid
Les experts de SuperGrid Institute s’efforcent de relever les défis techniques auxquels sont confrontés les réseaux à courant continu. Nous développons des technologies pour contrôler et protéger la stabilité des réseaux HVDC et MVDC, qui doivent être beaucoup plus dynamiques que les réseaux en courant alternatif (AC).
La définition des exigences relatives aux composants clés des réseaux en courant continu (DC) ou des systèmes d’alimentation combinés AC/DC, ainsi que la conception et la simulation des performances techniques de ces systèmes sont au cœur de notre travail. Nous utilisons des simulations transitoires électromagnétiques en temps réel avec des modèles intégrés précis des systèmes de contrôle des convertisseurs de puissance pour démontrer comment un système se comportera lorsqu’une nouvelle technologie sera intégrée au réseau (par exemple une nouvelle stratégie de protection).
Nos projets de recherche incluent :
Publications récentes
Definition of Standard Tests for MVDC Solid State Transformer in PV application
Qualification tests derived from existing standards to meet the requirements of MVDC Solid State Transformer in PV applications.
Possibilities and requirements on operation of future MVDC networks
Possibilities and requirements on operation of future MVDC networks Abstract After high voltage direct current (HVDC) has gained momentum, the same challenges, as the shift to distributed architecture with high renewables integration, are now causing medium voltage direct current (MVDC) to arise for distribution system. Several pilot projects are emerging worldwide to shed to light the advantages of MVDC technology. These networks are typically deployed on a dedicated area with selected composition of loads and sources under limited power. They have a configuration of a so-called soft link, being connection between two medium voltage alternative current (MVAC) networks and having a couple of MVDC nodes with loads and generations. This paper focuses on different MVDC configurations for a representative suburban distribution grid. The goal is to find a technically and economically viable configuration (s) and evaluate the interest of DC technology. A technical economic assessment (TEA) is performed among three networks configurations (full AC, full DC and hybrid MVAC+LVDC) considering qualitative and quantitative key performance indicators (KPI) including converter design, control and protection [...]
Evaluation of the interference effects of HVDC fault on a buried pipeline
Evaluation of the interference effects of HVDC fault on a buried pipeline Abstract HVDC transmission systems have potential effects on buried pipelines in their vicinity. Thereby, significant interferences can arise when a fault occurs on an HVDC overhead line, depending on factors such as the distance between the line and the pipeline, the exposure length, the soil resistivity, and the line configuration. This paper investigates the effects of these parameters on the pipeline’s induced transient overvoltage. Under normal operating conditions, only small current variations occur in the poles, and their electromagnetic field effects are negligible. However, when a pole-to-ground fault occurs, a transient stage lasting a few milliseconds leads to a significant increase in the electromagnetic field. This paper presents a variety of simulation studies obtained using an electromagnetic transients software (EMTP). Simulations were conducted for different HVDC configurations, specifically symmetric monopolar and bipolar setups. The results show that the induced voltage is significantly higher in bipolar configuration, but in both cases, the effects are not negligible. Precautions must be taken to mitigate [...]
