Solar current for the grid © Siemens Stiftung 2018 CC BY-SA 4.0 international

Solar current for the grid

Image

Schematic diagram:
Direct current from photovoltaic plants must be converted into alternating current for feeding into the grid. The steps for adapting electric power from a private plant and from a solar power plant (“solar park") are compared here.

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Image (182.1 kByte)
2018-10-26
The diagram compares two possible ways of generating power for the grid by means of photovoltaics: decentralized use in private households and centralized use in a solar park. In both cases the electric current must be converted into alternating current for feeding into the public grid by using a power inverter. Thanks to modern high-power electronics is it also possible to carry out almost loss-free conversion into medium and high voltages for the 36- and 110-kV network in large solar parks as well.
Incidentally: A solar panel has a power output of 30 – 350 Wp (Watt-peak = output with optimum solar irradiation).
Illustration
Technology
Grade 7 to 9; Grade 10 to 13
Middle/high school; Vocational training
Chart; Ecology; Energy; Energy supply; Environment (general); Environmental protection; Power generation; Power plant; Renewable energy; Solar energy; Solar technology
Siemens Stiftung Media Portal
MediaHouse GmbH using material from: Russell Neches - http://www.flickr.com/photos/rneches/2541181118/, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=28001643 (Power inverter; license: CC BY-SA 2.0), edited by Siemens Stiftung
© Siemens Stiftung 2018
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