The 9th International Symposium on ADVANCED TOPICS IN ELECTRICAL ENGINEERING 2015

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Tuning Unstable Process of a Superheated Steam Boiler through On-Line Efficiency Modelling

This paper describes 2 mathematical models used to stabilize the behavior of the unstable loops of a superheated steam boiler operating on a constantly changing blast furnace gas fuel, and an on-line determination of the blast furnace gas calorific value. The superheated steam temperature loop, with dead times of 5-10 minutes, was modeled to obtain the shortest and most robust response time from the PID regulator. The overall efficiency of the system was computed on-line, and together with computing the losses on exhaust gases it allowed to determine the fuel calorific value, shortening the fuel change response and giving operator feedback.


Catalin Puiu    
Politechnical University of Bucharest


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