Test Specification 13.01

Verification of large scale existing hydrogen storage for power system support

Test Specification Definition

ID	13.01
Reference to Test Case	TC13
Title of Test	Verification of large scale existing hydrogen storage for power system support
Test Rationale	The aim of the test is to verify the cost benefits and sustainability of large scale existing hydrogen storages for supporting and providing services to power systems.
Specific Test System (graphical)	The system uses in particular an existing empty storage for hydrogen such as an empty natural gas storage or salt mine.
Target measures	The test is successfully passed if the hydrogen storage can meaningfully support the power system balancing and via this remain profitable and sustainable.
Input and output parameters	Point of common coupling measurements setpoints for control of the hydrogen storage Reaction time of storage Profit
Test Design	This test needs to run in non-real-time for several years or seasons depending on the reaction time.
Initial system state	Networks operating on nominal power, temperature and pressure Storages are empty
Evolution of system state and test signals	The storages are filled based on the overproduced renewable generation Based on price signals the storages react and balance the power system
Other parameters	-
Temporal resolution	Dynamic, variable step size (seconds?)
Source of uncertainty	-
Suspension criteria / Stopping criteria	Critical violation of network operation constraints Networks becoming unstable