Steam Net Control

Optimation has developed a completely new concept of steam net control, which means that all operating modes are handled in a uniform manner and can handle high load spikes.

The steam control system consists of a minimum number of regulators, one per steam net, which controls several valves through a distribution program. The valves are used in priority order where, for example, direct reduction does not open until the turbine is fully used. Since only one regulator and thus only one pressure setpoint are used per network, the pressure can be kept much evener than for several regulators separated by different setpoints.

The same control strategy is used regardless of operating conditions. Current operating cases as well as current status are shown in a general overview. The operator has good information about how the steam network control works in different operating situations.

The concept is flexible and can be adapted to the conditions that apply to each plant.

To compensate for variations in heat output, a steam or hot water accumulator can be used. It can even out variations from both production and consumption, at the same time. A well-utilized accumulator in connection with district heating networks or paper mills smooths the operation of boilers and turbines so that they can run at optimal working point for the best efficiency.

Optimation increases the value of an accumulator through model-based prediction, using statistical analysis of the current usage pattern. The accumulator can thus be used more efficiently than with manual production control, enabling fewer starts of peak systems and smoother operation of base production units.