Development of testing protocols for the measurement of pure and blended hydrogen in natural gas grids: An outlook from the THOTH2 project

Transporting or blending hydrogen (H2) into the existing gas infrastructure can be crucial in the European green transition. However, the regulation of this matter is still debated by interested stakeholders. The THOTH2 project aims to fill normative gaps by developing new protocols for assessing the limits and tolerances of state-of-the-art (SoA) instrumentation installed in natural gas (NG) transmission and distribution grids. This paper outlines the methodology used for selecting the devices and establishing the testing protocols for the various categories of instruments. These instruments are scheduled for experimental testing in the subsequent phase of the project.