SunPowerCity — Innovative measures to increase the demand coverage with photovoltaics

Abstract

This paper presents measures to integrate a city district with a high share of building integrated photovoltaic systems into the electric grid. Achieving a 100% and higher total coverage of the city district's demand over a year imposes severe stress to the distribution grid supplying this area. The analysis of the coverage between photovoltaic (PV) generation and demand, based on real and synthetic profiles brings up the limiting factors of such a high share and density of photovoltaic generation. Different methods for improved integration — by increasing the direct use of the local generation — have been modeled and investigated. These are: the adaption of the generation profile, changing the shape of the demand due to the mixture of the usage of the building, and applying electrical storage. While the impacts of these different measures have been quantified, most flexibility has been introduced by the use of distributed energy storages.