Request for Information (RfI) on Digital connection of balancing service providers to the load frequency controller: IT-Dienste: Beratung, Software-Entwicklung, Internet und Hilfestellung

An important prerequisite for the secure operation of the transmission grid is the balance between electricity generation and consumption. When unforeseen oscillations occur, Swissgrid uses control energy and it commissions power plants to increase or decrease their production.

The volume of decentralised flexibility resources (electromobility, battery storage, heat pumps, etc.) in power system is increasing. This so-called demand side management is a useful addition to established flexibility resources such as hydropower plants and can be used to provide balancing energy.

Therefore, Swissgrid launches this Request for Information (RfI) to explore whether there are solutions to simplify the connection to Swissgrid's load frequency controller for BSPs. Currently, providers of secondary control energy need to have physical connection to the control system in order to receive the serial real-time activation signal implemented in common SCADA communication protocols. This physical connection fulfils strict requirements on the connection availability to Swissgrid load frequency controller. Swissgrid is now seeking solutions for making this control signal available digitally. Such a solution must fulfil at least the following requirements:

1.   Reception and provision of serial signals from Swissgrid;

2.  Conversion, provision and reception of these signals via a web service (e.g. REST API) for the BSPs;

3.  Non-functional requirements such as security, availability, and latency.

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