Modelling a Lignite Power Plant in Modelica to Evaluate the Effects of Dynamic Operation and Offering Grid Services
Moritz Hübel, A. Berndt, Sebastian Meinke, Marcel Richter, P. Mutschler, Egon P. Hassel, HARALD W. WEBER, Michael Sander, Jonas Funkquist · Linköping electronic conference proceedings · 2014
Oering services to stabilize the electrical grid is nowadays one of the major tasks of fossil power plants and also of signicant economical relevance.However the eects on the power plants regarding the additional wear of components is uncertain.Usually the eects regarding control reserves, especially primary control occur with high frequencies and small amplitudes, which makes investigations based on measurement data impossible since the eects are masked by the noise of normal operation.In order to investigate this issue, a detailed model of a lignite power plant has been used, which was developed in Modelica for simulating and comparing scenarios with and without oering primary control reserves.The model comprises the entire water-steam cycle including turbines, preheaters and pumps, as well as a very detailed boiler model including the air supply, coal mills, a combustion chamber, heating surfaces and piping.Furthermore the power plants control system has been implemented in a very precise way.In addition the study involves an investigation on the input signals (grid frequency) and a calculation of lifetime consumption for specic components to evaluate the eects.