Impact of large scale photovoltaic generation on voltage stability in distribution networks

This paper investigates the impact of integrating large scale photovoltaic power on voltage stability in radial distribution networks. Detailed modeling of the photovoltaic systems is presented. The study is based on bifurcation diagrams of photovoltaic generation, load flow analysis, short circuits, photovoltaic farm disconnections and loading conditions. Maximum penetration levels of solar photovoltaic generation are examined using bifurcation diagrams. The study considers is a utility 53 buses radial distribution network. Several aspects are presented and discussed. RÉSUMÉ. L’évolution des réseaux électriques est marquée par des variations continues de leur topologie. En particulier l’intégration des sources renouvelables de plus en plus importantes a soumis ces réseaux à de nouvelles contraintes d’exploitation. A titre d’exemple, les systèmes photovoltaïques (PV) posent de nouveaux problèmes de stabilité aussi bien statique que dynamique, qui ne cessent d’évoluer avec l’accroissement des puissances installées. En effet, l’intégration de ces fermes photovoltaïques influe sur les caractéristiques électriques de fonctionnement du réseau en régime statique, et présente aussi un impact sur son comportement dynamique. Cet article porte sur l’impact d’une intégration massive de l’énergie photovoltaïque sur la stabilité statique et dynamique du réseau de distribution tunisien. Pour cela nous avons mené une étude statique basée sur les diagrammes de bifurcation de tension. Ensuite nous avons entamé le régime transitoire dans un tel système en cas de base et en cas de pénétration photovoltaïque maximale.

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