Performance Modeling of A Wind-Solar-Hydrogen Multi-Energy System for Economic Operation

In the past decades, the installation of wind and solar energy has rapidly increased. The electric grid has been ever increasingly penetrated with such intermittent renewable source, which inevitably increase the schedule difficulty and cause stability issues. To solve such problems and efficiently utilize the renewable energy, electrolyzer plants are integrated within the grid. In this work, we propose a performance modeling method to evaluate the economic operation of multi-energy system with a wind turbine, PV farm, and electrolyzer plants. The proposed model considers the uncertainty of the wind speed, solar irradiance, and electricity and hydrogen price variation. The estimated system revenue is compared with and without the electrolyzer plant at hourly electricity spot price and four-hour hydrogen spot price. Meanwhile, the estimated system revenues with summer and winter electricity price are evaluated separately. In the summer, the system operator can increase the revenue by participating the hydrogen market, whereas, during the winter, the electricity revenue is greater than the hydrogen revenue due to the expensive electricity price.