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→Chapter 5 Energy Generation / Powerplants
=Chapter 4 Energy Suppliers / Retailers=
[[File:TAF.png|thumb|Tarif-Anwendungsfälle (TAF)]]
The market role "Lieferant" (retailer or supplier) is the consumers contracting party for energy delivery. This party is not necessarily the same organization or company acting in the role of grid or smart meter operator. Nevertheless it has vital interest to influence the behaviour of energy deliver to the customer via the smart meter. For this purpose the retailer is using the role of "external market participant" in the WAN connected to the smart meter gateway. The messages from the retailer can be authenticated by the smart meter gateway using the PKI and do include meter readouts (UTILMD MSCONS 13017), status information and changes in tarriffs.
=====Tarif Anwendungsfälle (TAF)=====
=Chapter 5 Energy Generation / Powerplants=
Actual powerplants do not have a direct technical relation to smartmeters in Germany. They function as an indication on who and how much is to charge for their operation of course. Power plants are connected to Redispatch 2.0 and are under the control of the grid controllers of course. They schedule their activities by load prrofiles, derived from historic data. This is then overlyd with "day-ahed" planning and immediate reaction to redispatch measures. They function by their ablity to react on sudden demmand changes. This leads to a hirarchy of systems and fuels:
* gas operated (can be quickly activated an shut down, recation time <30 Mins)
* coal and biogas operated (can be scheduled to react in about 4-5 hrs)
* nuclear operated (can be scheduled to react in about 4-5 hrs, not existing in Germany anymore (2024))
* wind and solar power (basically uncontrolled, can be disconnected in thess than a second)
Redispatch will force all of them to disconnect from the grid within very short timespans. Addin them for stabilizing reasons has to schedulaed according to their natural time to react. As electricity from solar and wind energy generators are given priority but in the same moment do expose the grid to an extensive volatilities, other means for stabilizing the grid need to be either based on gas operated sources or planned ahead. All of this includes extensive weather monitoring and forcasting to maintain grid (frequency) stability while still allowing wind and solar generated eletriciy to be used with their inevitable volatile nature.
=Chapter 6 Energy Import /Export in the EU and Worldwide=