A Power-to-Gas Integrated Microgrid Optimal Operation Strategy Based on Rolling Horizon

With the increasing penetration of renewable energy injection in the electric power grid, the impact of uncertainty and fluctuation in renewable energy generation on the grid performance cannot be ignored. Integrated energy networks with the Power-to-Gas (PtG) system have been used to maintain the stability of the system by means of the efficient conversion of different energy forms (electricity and gas) and massive energy storage. Meanwhile, microgrid which contains various kinds of energy sources becomes an important component of the energy network, equipped with advanced control and communication devices. This paper proposed a method for optimal operation of microgrid which contains the PtG system with rolling horizon strategy, applied the power and gas cooperative accommodation to solve the deviation between the forecast load and real load and reduced the overall microgrid operation cost in a corrective manner. Models of various components in a microgrid are introduced and a mixed integer linear program (MILP) mathematical optimization problem is formulated to describe the day-ahead operation problem. The rolling horizon strategy is adopted to reduce the impact of intermittence natural of the renewable energy sources and the benefits in cooperative accommodation of electric power and gas in a corrective manner is discussed as well.