Sizing of An Integrated Power Supply System With An Electrolyzer and A Hydrogen-Fueled Gas Turbine

This work aims at sizing a power supply system composed of a wind plant, an electrolysis plant, a compressor, a storage tank, and a hydrogen-fueled gas turbine power plant to deliver low-carbon electricity. This system offers the benefit to be a dispatchable power supply system, needed to deliver flexibility on the grid. For this Power-to-Power system, the sizing objective is to find the minimal functional sizes for all the components of the system, namely a wind plant, an electrolysis plant, a hydrogen compressor, a storage tank and a gas turbine. The sizing is done for the case of Germany in 2021. Two system plannings are considered: one in which demand is supplied solely by the gas turbine and the wind plant is dedicated to green hydrogen production, and a second one in which wind plant produces hydrogen and supplies demand while gas turbine completes balance. We also evaluate the capital and operational costs of the system, as well as its water usage and land footprint. Sizing results computed show that using an integrated approach in which planning is done to exploit the synergies between the wind plant and the gas turbine not only generates gains in costs, space and water usage, but also avoids over-sizing the system.