Links

The Bundesnetzagentur's electricity market information platform "SMARD". An up-to-date and in-depth overview of what is happening on the German electricity market. Articles offering background information explain important electricity market terms and relationships.
https://www.smard.de/blueprint/servlet/page/bnetza-en/5790

Current electricity production in Germany: very nice representation for renewables per day / week / month / year – a service by Fraunhofer ISE
https://www.energy-charts.de/power.htm

Map with all major power plants in Germany and characteristics – a service by Fraunhofer ISE
https://www.energy-charts.de/osm.htm

Renewable energies and energy efficiency in your neighbourhood.
https://www.repowermap.org/index.php?ln=en

Electricity Map: CO₂ emissions of the current electricity production of a country in real time (with the type of power plants used) for Germany and Europe, pleasantly animated in color in a map
https://www.electricitymap.org/?lang=en&wind=true&solar=false&page=map

Information on the main electricity-trading platform named European Energy Exchange AG (EEX), in particular power plant deployment, current trading prices and trading options:
https://www.eex-transparency.com/

Agora Energiewende: Information on electricity generation and electricity consumption: Individually configurable (prices, power plant types, import / export, time and date range):
https://www.agora-energiewende.de/de/themen/-agothem-/Produkt/produkt/76/Agorameter/

Current electricity production of photovoltaics in Germany, with the option to retrieve particularly bad and good days (link cannot be found directly on the homepage of SMA):
https://www.sma.de/en/company/pv-electricity-produced-in-germany.html

Actual grid frequency: In principle, there is electricity shortage, if the grid frequency falls below 50 Hz, and there is power surplus if the frequency exceeds 50 Hz. This can be used to control load management measures: apply additional loads during overfrequency, reduce consumption during underfrequency.
http://www.netzfrequenzmessung.de/index.htm

The interactive EnergyMap Map: Nice, but unfortunately not maintained any more since 2015): http://www.energymap.info/map.html

International grid data:

open-power-system-data.org/data-sources

Europe:

ENTSO-E: https://transparency.entsoe.eu/

Sweden: https://www.svk.se/en/national-grid/the-control-room/

UK: http://www.gridwatch.templar.co.uk/

France 1: http://www.gridwatch.templar.co.uk/france/

Spain: https://demanda.ree.es/movil/seleccionar-sistema

Asia:

Russia: http://br.so-ups.ru/Public/MainPageData/BR/PowerGeneration.aspx

India (Delhi): http://www.delhisldc.org/Redirect.aspx?Loc=0804