Hosting Capacity of a Low-Voltage Grid : Development of a Simplified Model to be used in future Solar Roadmaps

• Main Authors: Andersson, Jonas, Bernström, Vendela, Törnqvist, Joacim
• Format: Others
• Language: English
• Published: Uppsala universitet, Institutionen för teknikvetenskaper 2017
• Subjects: solar roadmap; hosting capacity; PV power; PV system; overvoltage; low-voltage grid; self-consumption; Energy Systems; Energisystem
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-325010

The purpose of this bachelor thesis is to assess whether it is possible to create a simplified model that estimates the hosting capacity of a low-voltage grid. The Simplified model is compared with a more elaborate model created by the Built Environment Energy Systems Group (BEESG) at Uppsala University. The Simplified model takes three easily obtainable variables into account. The model created by BEESG allows us to observe both the amount of photovoltaic (PV) power that is installed as well as the voltages in each bus in a grid. The hosting capacity is found by gradually increasing the amount of PV power installed in a low-voltage grid until overvoltage is reached. Simulations with BEESG’s model are done for a week in July when the PV generation has its peak and the load is generally low. The Simplified model is created using linear regression with the calculated values from the BEESG’s model as a reference. The report shows that the Simplified model will give an estimation of the low-voltage grid’s hosting capacity that is comparable to the value calculated with BEESG’s model. The results show that it is rarely the low-voltage grid that restricts the installation of PV facilities and that a high self-consumption is advantageous regarding to the grids hosting capacity.