Test Specification 24.01

Interoperability validation and evaluation of the activation chain to satisfy a DSO flexibility request as a response to a voltage disturbance event at a specific grid node.

Test Specification Definition

ID	24.01
Reference to Test Case	Interoperability testing and validation in the activation chain of flexibility-related events in a local distribution network
Title of Test	Interoperability validation and evaluation of the activation chain to satisfy a DSO flexibility request as a response to a voltage disturbance event at a specific grid node.
Test Rationale	The aim is to investigate through the interoperability validation tests, the interaction and information exchange between the involved actors for a flexibility activation event. This event will be triggered by a local node voltage disturbance (functional disruption) and followed by a consequent flexibility request.
Specific Test System (graphical)
Target measures	In the system under test, the interoperability test will be in the simple “pass/fail” form. The time the system requires to restore the voltage back to the desirable deviation levels is evaluated, i.e., the time that the system takes to respond to the voltage support mechanism after a disturbance in the power grid. If this time = ∞ --> fail, else --> pass
Input and output parameters	Internal RTU time delay Reference Voltage Admitted Voltage Deviation Time required for Flex to activate Available flexibility capacity Maximum activation time for flexibility
Test Design	A simulation period of X minutes long, during which a functional disruption is introduced in the system. This disruption causes a voltage disturbance and results in a flexibility activation request to restore the system back to acceptable conditions. The connection and communication between all the involved actors in the activation chain is evaluated under an interoperability point of view.
Initial system state	Initially the system service is operating “as usual”. The grid loads are at their nominal values and the grid is functioning without disruptions. As far as the communication is concerned, we assume that the communication links between the various actors are 100% reliable.
Evolution of system state and test signals	The networked is continuously monitored by the SCADA. A voltage disruption (disturbance) is introduced at a specific node. The system (through the DSO) asks for flexibility so as to restore the voltage in a reasonable time period. The interconnection between the whole activation chain and all necessary actors is studied and assessed under an interoperability point of view.
Other parameters
Temporal resolution	To be determined
Source of uncertainty	Only a deterministic type of disruption event is introduced.
Suspension criteria / Stopping criteria	30 minutes or permanent loss of communication and/or grid connection