scope:

This Technical Report deals with limiting controls in fossil-fired steam power stations. In their task and effect, limiting controls lie between the actual operating controls and the protective devices. Operating controls have the task of controlling the power generation process in such a way that the generated output always corresponds to the predetermined set point, and the individual subprocesses are thus carried out in accordance with economic and environmental criteria. Protective devices have the task of protecting human beings, the environment and the plant as well as its components against damage, principally by means of shut-down. Limiting controls are used to support the operating controls, and hence enable continued operation - possibly under restricted conditions - in the event of transient processes, for example, during start-up and shut-down, and in the event of anomalous operating states.