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Impact of HVDC interconnectors on the transient stability performance of power systems

Galand, Gil ; Nguyen, Duc Huy
(2022)

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Details

Supervisors
De Jaeger, Emmanuel
Faculty
Ecole polytechnique de Louvain
Degree label
Master [120] : ingénieur civil électricien, à finalité spécialisée
Master [120] : ingénieur civil électromécanicien, à finalité spécialisée: énergie
Abstract
In 2019, the first High-Voltage Direct Current HVDC link in Belgium was inaugurated : Nemolink. It connects the United Kingdom with the Belgian grid and can transport up to 1000MW of power. A year later, a second HVDC connection named ALEGrO was created with Germany, allowing to exchange up to 1000MW as well. Nowadays, a third HVDC connection is being studied to interlink Belgium and Denmark. Belgium is not an exception : multiple interconnections in HVDC are being developed all over the world. These direct current connections meet the growing need to interconnect the networks of different countries. Indeed, an interconnected network contributes to the sustainability and security of supply. In addition, the growing share of renewable energies contributes to the volatility of the electrical production, and interconnections between electrical networks allow to gain flexibility. During high peak of production, if the consumption is not sufficient to balance the network, the excess of electricity can be sent elsewhere. The same applies when electricity production is not sufficient to support the consumption. This flexibility in the transmission is therefore an important aspect of the production of renewable energies. These HVDC interconnections can play an important role in the future and their presence is growing. This work aims to study their impact on the transient stability of the power system. In conclusion, it has been established that reactive power support is feasible with the MMC and plays an important role during the three-phase fault to support the synchronous generator and to improve its transient stability.

Citations

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Galand, G., & Nguyen, D. H. (2022). Impact of HVDC interconnectors on the transient stability performance of power systems. https://dial-mem.test.bib.ucl.ac.be/handle/2078.2/32786