In this thesis the relation between simulation and reality of water hammer problems in hydro power plants is analysed. Especially concerning so-called "oscillation bulges", which result in the simulation, although the surge tank would have to avoid them. So the main question is, if these "oscillation bulges" are a phemomenon of the simulation and the water hammer does not occure in this size in reality, or if these "oscillation bulges" appear in reality and how they result.
This analysis contains a short introduction into water hammer analysis with an added explanation of the impedance method. Afterwards modelling is specified. Simulation results of these model were used to project and build a test rig. Used components and specification of the plant are described in another chapter. On this test rig measurements for the comparison to the simulation were carried out. These measurement results were mapped to charts and opposed to the simulation results, which were addapted to the modified parameters of the test rig.