Safely landing water networks during power outages with energy storage

One of the main causes of water hammer in water networks is power outages. Water hammer is usually mitigated with surge tanks and by mechanically interfacing flywheels with pumps. We propose to use electrical energy storage to keep pumps operational through power outages. We formulate a safe landing problem, in which the pressures and flows are brought to zero without damaging the network and before the storage runs out of energy. We show results from a preliminary numerical study for a single pipe system.