Hydroelectric energy

Coarse and fine sediment in the water catchment

In some countries, water power makes a very large contribution to the total electricity production. Hydroelectric power stations are supplied with water from kilometre-long tunnels or pipelines from lakes, reservoirs and rivers in the surrounding area. In order to extend the service life of the turbines as long as possible, sediment and debris carried by the water must not be allowed reach the turbine. The debris is separated from the water in a sedimentation basin by means of rakes and spillways. To realize automatic flushing out of the settled debris, a reliable underwater detection system is required.

Detection of settled debris with VEGAVIB 62

VEGAVIB 62 is ideal for solid matter detection under water and therefore a real alternative to radiation-based level detection. When the vibrating rod is covered with sediment under water, a switching command is issued. Through this the flushing process can be automated. Cyclic flushing can thus be eliminated, which contributes to optimal turbine exploitation. The vibrating rod is provided with a cover to protect it against abrasion and impact from rocks in the sediment.

Level measurement at the intake with VEGAPULS WL 61

The VEGAPULS WL 61 sensor measures how much water is in the catchment. Mounted over the inlet to the catchment, it measures the current level with high precision. An absolutely wear and thus maintenance-free operation is guaranteed through the non-contact measurement.