241 PROFINET Actuators
241 AUMA electric actuators have been installed as part of a retrofit at Stockholm’s largest combined heat and power plant, Kraftvärmeverk 1. The modern actuators with PROFINET communications now ensure the smooth generation of electricity and heat from renewable fuels.
The combined heat and power plant was originally built in 1976 for fossil fuels. To continue working reliably in the future, the plant operated by Stockholm Exergi, the Swedish capital’s energy supplier, had to be modernized.
20 More Years
A large-scale retrofit project was initiated that will extend the service life of the plant by a further 20 years and help to meet Stockholm’s growing demand for heating and electricity during the cold winter months. The boiler was converted so that it can be operated with renewable fuels such as bio-oil.
Within the scope of this project, AUMA received the order to automate 241 valves. AUMA’s broad portfolio offered the perfect electric actuation solution for each application: SA and SQ actuators with AC 01.2 actuator controls, sometimes combined with GST and GS gearboxes or LE linear units, as well as SAR and SARV modulating actuators for more stringent control requirements. AUMA service experts dismantled the old devices on site and installed and commissioned the new devices.
Total Control
The actuators are used to control all the processes in the combined heat and power plant, from the fuel supply, feed water and steam systems to flue gas cleaning and feeding into the district heating network. Using AUMA actuators with integral PROFINET communications brought major advantages: high reliability thanks to integrated redundancy, easy and flexible integration, and advanced diagnostic options. Overall, the AUMA actuators help to improve the efficiency, reliability and safety of the CHP plant and reduce operating costs.