| Abstract |
This paper presents a two-step method for dimensioning and time-sequential operation of Wind-hydrogen (H2) plants
operating in power markets. Step 1 involves identification of grid constraints and marginal power losses through load
flow simulations. Step 2 involves solving a model for optimization of the component sizes (wind turbine, electrolyser, H2 storage, fuel cell) and the corresponding time-sequential operation of each component. Results are presented through a case study of a Norwegian island with good wind resources, a weak connection to the main transmission grid and a commuting ferry, constituting the H2 load. Main results show that if H2 consumers are willing to pay at least 0.31-0.34 ? per Nm3, the wind power penetration could be cost-effectively increased by 1.8-1.9 MW by including an average H2 load of 1.36 MW. The H2 plant is very dependent on power import and H2 storage capacity is only 1.5 - 2 days of average demand. The operational flexibility of the H2 plant opens for a more optimal power exchange with the grid. It is concluded
that H2 produced from wind power could be competitive with fossil fuels. H2 is however not cost-effective as electric
energy storage for wind power plants operating in power markets. |
