Objective Within the project, three improvements were carried out. Utilising the intake channel as solid weir reduces the fluctuations of operational water level.Executing the horizontal Kaplan bulb turbine with the brass body reduces the sound level considerably.Realising the implementation of a converter operated asynchronous generator allows overload and access speed for power generation.The implementation of a solid weir reduces the regulation demand of the gates of the barrage considerably. Only 5 cm above the upstream water level, a contouring line of the solid weir is positioned.Solid weir is able to flush the surplus water to the down stream stilling basin. The upstream area is no more effected by fluctuations any more.Utilising brass material for the turbine reduces the sound emission.Sound level measurements under operation proved, that less than the requested sound level (35 dBA) is available at the closest building.The innovation proves that the erection of power stations within residential areas is feasible.Most exciting innovations was the converter operated generator.The generator design for 660 V output produces current with 50 Hz at a speed of 650 UPM.Main criteria for choosing the converter was the idea to feed the electrical net with 50 Hz without changing to power station design. Physical and operational basic data of turbines have been well known.The converter application allows to charge the flow at low load and overload output.Overload charge is possible, because surplus opening of turbine can flush more water while increasing the speed.Aberrations of the speed are possible, due to the connection of the generator with a converter unit.The surplus output, due to overflow and minimised flow condition comes for the Rottenburg power station up to 8%.In December 1990, the barrage was ready for lifting the head.Due to winter season and necessary adjustments of steelworks, the initial start up was delayed. On 26th of March 1991, the turbine runner rotated for a first time.Between start up and the official opening ceremony on 30th of August 1991, test runs, last details of programming and the basic test routines were carried out.The responsible team of STADTWERKE ROTTENBURG and DR. HUTAREW & PARTNER decided to finish all tests for double regulated operation and the electronic equipments in advance. For this reason, the converter test took place end of year 1992.Production came up to 1,5 GWh in the first months of operation, though water flow was poor. In springtime 1992, the results of the turbine have been ckecked to get the 1:1 information on flow, head and output. The additional specific test equipment was added in follow.Initial start up of the converter unit took place in February 1992. The test runs for 50 Hz converteroperated power generator as well as free speed tests have since then been carried on. Programme(s) ENG-ENALT 2C - Programme (EEC) of demonstration projects relating to the exploitation of alternative energy sources and to energy saving and the substitution of hydrocarbons, 1983-1985 Topic(s) Data not available Call for proposal Data not available Funding Scheme DEM - Demonstration contracts Coordinator STADTWERKE ROTTENBURG EU contribution No data Address SIEBENLINDENSTRASSE 19 7407 ROTTENBURG Germany See on map Total cost No data
