  Hydrogen energy plays an important role in the transformation of low-carbon
energy, and electric hydrogen coupling will become a typical energy scenario.
Aiming at the operation flexibility of low-carbon electricity hydrogen coupling
system with high proportion of wind power and photovoltaic, this paper studies
the flexibility margin of electricity hydrogen coupling energy block based on
model predictive control (MPC). By analyzing the power exchange characteristics
of heterogeneous energy, the homogenization models of various heterogeneous
energy sources are established. According to the analysis of power system
flexibility margin, three dimensions of flexibility margin evaluation indexes
are defined from the dimension of system operation, and an electricity hydrogen
coupling energy block scheduling model is established. The model predictive
control algorithm is used to optimize the power balance operation of the
electro hydrogen coupling energy block, and the flexibility margin of the
energy block is quantitatively analyzed and calculated. Through the example
analysis, it is verified that the calculation method proposed in this paper can
not only realize the on-line power balance optimization of electric hydrogen
coupling energy block, but also effectively quantify the operation flexibility
margin of electric hydrogen coupling energy block.
