Large-scale connection of single-phase inverters for solar panels in low voltage networks
Single-phase connection of solar power to the low voltage electricity network will affect the grid performance in a number of ways. Impacts on voltage balance were studied in an earlier project. The calculation method and data from the previous project will be used as a base to study the impact of single-phase connected solar panels to overcurrents and overvoltages in low-voltage networks.
Measurements were carried out with two customers in Skellefteå over the summer of 2016 to assess existing voltage variations and additional measurements are possible. Stochastic models will be developed and applied to the two existing low voltage networks (in each network measurements will be available for at least one customer). In this project the same network will be used as in the previous project, with additional data where needed. The model will be used to quantify the benefits of a number of possible measures to reduce the risk of overvoltages. There will be a cooperation with a project on harmonics due to solar panels.
Funding: Energiforsk.
Collaboration: STRI.
Project participants: Martin Lundmark, Cecilia Karlsson, Math Bollen.
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