CONTROL OF ENERGY AND POWER SYSTEMS

Publisher Summary This chapter discusses the ways to manage energy and power systems in power plants. The usual method used for making real power available is the primary control, in which the affected steam power plants are run throttled. In the case of a sudden frequency drop, the turbine valves are opened and, thus, steam is stored out of the turbine. In the case of constant pressure operations, an increase of the fuel flow is brought about only by this gradual pressure drop, causing delayed increase in steam generation from the boiler entrance. If there is a switching off of the LP feed heater on the steam side, a practically undelayed increase of generator power PQ is brought about. Meanwhile, if there is a switching off on the water side, the inertia of the LP feed heater takes effect, whereby its time constants increase reciprocally to the falling off of the extraction flows.