H2 injection impacts major gas parameters, including pipeline pressure drop, flowrate, velocity, and most importantly, composition, GCV and Wobbe index, therefore prior to H2 addition to the grid, the installation has to achieve that the resulting blend will satisfy gas parameters. The above will be controlled by a smart hydrogen injection and operation system, which will keep hydrogen percentages at certain levels, while also deblending solutions will be applied for consumers with special needs in fuel purity.