  We introduce a tool for simulation and optimization of gas pipeline networks
coupled to power grids by gas-to-power plants. The model under consideration
consists of the isentropic Euler equations to describe the gas flow coupled to
the AC powerflow equations. A compressor station is installed to control the
gas pressure such that certain bounds are satisfied. A numerical case study is
presented that showcases effects of fast changes in power demand on gas
pipelines and necessary operator actions.
