Lego modelling of the power station electrical auxiliaries for a real-time training simulator

The paper reports on the development of a model of the electrical auxiliaries of a typical Italian fossil-fired power station. The model is developed as part of a real-time training simulator of the ENEL operators´ School at Piacenza (Italy), in order to reproduce transients with time constants of the order of a few seconds or longer, such as voltage variations at the system buses, load changes, operator manoeuvres, and intervention of the protective systems. For the same simulator, an additional task-model has been developed to reproduce the re-start of the power station after a complete or partial loss of the transmission system. Each model works within the LegoCad environment, a powerful software system developed at the Research and Development Department of the Italian Electricity board (CRA-ENEL) to fulfil its own needs of power plant simulation for mechanical and control system design as well as for operator training