Hosting capacity of medium voltage grids for new production and new consumption

There is an increasing number of new connections and requests to connect large photovoltaic plants, large vehicle charging plants, and large battery plants to the medium-voltage grid. In addition, the amount of solar power, vehicle charging, and batteries connected to the low-voltage grid is expected to soon reach levels where it affects the medium-voltage grid.

In this project, methods for hosting capacity calculations will be developed and applied for connecting new production and consumption directly to the medium-voltage grid. What will be considered are limitations in the medium-voltage grid itself and the need to keep a margin for future connections to the underlying low-voltage grid.

There are several phenomena that limit the amount of production or consumption that can be connected to the medium-voltage grid. This project will mainly focus on over- and undervoltage in the low and medium voltage network, overloads in the medium voltage network, and detection and disconnection of earth faults in the medium voltage network.

Funding: Skellefteå kraft

Project participants: Taís Tavares de Oliveira, Math Bollen