Variable-speed Pump Drives for the State Water Utility in Baden-Wuerttemberg
Challenge
 The
state water utility of Baden-Wuerttem- berg (LW) is one of the largest long distance
water supply utilities in Germany. More than three million people are supplied
with drink- ing water through a long distance network of pipes extending over
770 km. The ground water capture locations must be flexibly oper- ated to maintain
a high quality of the drinking water supply. This means that every water capture
location must be able to precisely supply the water quantity that is required
for the correct mixing ratio and therefore the optimum drinking water quality.
Solution
In order to be able to flexibly and efficiently manage its ground water capture
locations the water utility company uses variable-speed pump drives. Reliable
SINAMICS G150 drive converters that are simple to handle control the pump speed.
These drive converters are integrated into the central supervisory con- trol
system through existing SIMATIC S5 controls.
Advantages
- More precise closed-loop flow control and shorter response times than mechanical
control concepts
- Significantly less energy is required
- Operation that reduces stress on the mechanical equipment – operator-
friendly concept with a clear, transparent structure
- More space in the control room by using a more compact design
- The pump system is controlled via the central control room by seamlessly
integrating it into the existing automation environment
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