Netzanschluss von 50 Gigawatt Photovoltaik in der Schweiz: Diskussionspapier zu Lösungsansätzen für die Netzintegration = Grid connection of 50 gigawatts photovoltaic systems in Switzerland = Raccordement au réseau de 50 gigawatts de photovoltaïque en Suisse

Bucher, Christof; Joss, David (September 2023). Netzanschluss von 50 Gigawatt Photovoltaik in der Schweiz: Diskussionspapier zu Lösungsansätzen für die Netzintegration = Grid connection of 50 gigawatts photovoltaic systems in Switzerland = Raccordement au réseau de 50 gigawatts de photovoltaïque en Suisse Biel: Berner Fachhochschule, Technik und Informatik

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Switzerland’s Energy Strategy 2050 focuses, among other things, on the strong expansion of new renewable energies. The majority of this is to be photovoltaics (PV). The foreseen power of all PV plants (around 40-50 GW) exceeds the maximum vertical grid load of today (around 8-10 GW) by a factor of five. Against this background, it is obvious to anticipate grid bottlenecks despite the coming decentralised use of flexibility and to demand rapid grid expansion. It can be assumed that there will be an oversupply of solar power throughout Europe at the same time as production peaks from PV systems in Switzerland. 50 GW of PV are necessary for the energy transition, but the potentially resulting power peaks cannot be absorbed by the power grid and probably cannot be exported due to a lack of demand at times of solar power production surplus in other countries. These power peaks must therefore be absorbed or avoided in a decentralised manner (in the building, in the area, in the neighbourhood). Even if the distribution grid were expanded to absorb the expected power peaks, these power peaks could not be fed into the grid, or only at times of low or negative market prices. In the view of the authors, it is more expedient to invest in the decentralised handling of power peaks than in the expansion of the distribution grid. A large part of the presumably limited solar power that can be fed into the grid can be absorbed in intelligent, decentralised systems (heat pumps, storage, electric mobility). Corresponding products and solutions are available on the market and have been used in various projects for many years. However, in order for these systems to reliably relieve the electricity grids or enable PV expansion without additional excessive grid load, the following framework conditions must be adapted: • The absolute feed-in priority of solar energy must be discussed. There must be no right to feed power peaks into the grid that are not very relevant in terms of energy but are challenging and uneconomical for the overall system. • Grid operators and regulators must allow decentralised, flexible systems and motivate grid-friendly behaviour within the framework of an appropriate incentive system. The expansion of PV systems can be further accelerated in the process, because the most important measures for grid integration are already available today and can be implemented immediately. Various historically grown realities in today’s electricity supply system, such as the tariff structures, the nightly heating of hot water storage tanks or the control power concepts, are today taken as given and hardly questioned. So far, this has only hampered the expansion of new renewable energies in individual cases. However, these structures and habits are not suitable and too inflexible for the future, much larger addition of PV systems. This discussion paper identifies a number of possible solutions that would serve to integrate 50 GW of PV systems into the Swiss power grid.

Item Type:	Working Paper
Division/Institute:	School of Engineering and Computer Science > Institute for Energy and Mobility Research IEM School of Engineering and Computer Science > Institute for Energy and Mobility Research IEM > IEM / Photovoltaic systems School of Engineering and Computer Science
Name:	Bucher, Christof0000-0001-7092-0804 and Joss, David
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Publisher:	Berner Fachhochschule, Technik und Informatik
Language:	German
Submitter:	Christof Bucher
Date Deposited:	20 Sep 2023 09:25
Last Modified:	20 Sep 2023 09:25
Related URLs:	Organisation
Uncontrolled Keywords:	Photovoltaik, Netzanschluss, Energiewende, Solarstrom
ARBOR DOI:	10.24451/arbor.19728
URI:	https://arbor.bfh.ch/id/eprint/19728