Automation of water supply in the Tumen distribution network

Summary

In 2016 the system of automated control of the second-lift water pumping stations of the Metelevskii and Velizhanskii water intakes was put into industrial operation. For the first time the functions of maintaining the standard operating pressure and supply of the required water amount from the second-lift pumping stations to the municipal water distribution network were automated. Introducing the complex of controlling the operation of the second-lift pumping stations on the basis of the data on the pressure in the dictating points of the network in real time mode provided for qualitatively improving the operation efficiency of the distribution network. The introduction of the automated process control system in the water supply allowed reducing pressure fluctuation in the municipal distribution network. The result was the reduction of the failure rate. Automatic maintaining the operation mode of the municipal distribution network provided for eliminating the excess pressure at the pumping stations that were unavoidable in the manual control mode. According to the expert estimates the potential of pressure reduction in the collection pipelines of the second-lift pumping stations of the Metelevskii and Velizhanskii water intakes is 10–15%. The reduction of the energy consumption with the use of a variable speed drive will be equal to the pressure reduction.

Key words

water intake , pumping station , frequency-regulated electric drive , pressure monitoring , dictating points , water supply system optimization

Improving the system of the water distribution network
operation control in Tumen

Summary

Owing to large-scale housing construction in 2004–2008 the water consumption in Tumen significantly increased. The growing loading on the water facilities resulted in intermittent insufficient pressure level at the pumping stations in separate municipal districts. These irregularities actually «shattered» the water supply system; and in case of continuing water consumption pattern they could have caused complete water deficiency and water supply collapse because of the lack of the capacity reserve already in 2009. To handle the problem the upgrade projects were urgently updated – the parameters of the pumping units and their control algorithms were revised. The key role in calculations played the studies of Boris Semenovich Leznov, a famous research worker in the field of variable speed drives for pumping units. The system of water intake control was qualitatively modified. Pressure gauges were installed at ten critical control points in the distribution network that transmitted on-line data to the Central Control Service. Upgrading pumping stations and using reliable information on the distribution network operation provided for uninterrupted water supply of the entire city. Operator’s control of the emergency situations in the water distribution network was an additional advantage of pressure monitoring. In 2011 and 2012 variable speed drives were put into pilot operation at the second-stage pumping stations of the Tumen public water supply. As a result the stable operation of the pumping equipment and energy saving were ensured; throttling was abandoned. At present the control algorithms for complete automation of the municipal water supply are being designed.

Key words

pumping station , control points in the distribution network , water supply optimization , pressure monitoring