Design and Test of the Control System of a Nuclear/Fossil District Heating Plant by Means of Dynamic Simulation

摘要

The paper is concerned with a composite heat plant, including a nuclear part and a fossile one. Two models are given. The fist model describes, the sole nuclear plant, with a point core model; U-type primary heat exchanger; primary pumps, intermediate loop and output exchanger. It contains about 100 equations. The second one includes a simplified model of the nuclear plant; a model of the fossile fuel heat plant and of the coupling exchanger; and a simple description of the users' network. Both models are valid from 5% to 100% of the nominal power, and programmed by means of the CEA simulation language NEPTUNIX. Conrol design is carried out in two stages; each of them corresponding to the use of one of the precedingly defined models. In a first stage, the control system of the nuclear plant is designed. In a second stage, the dispaching of heat demand between nuclear plant and fossile fuel plant is defined from technical criteria; and its automatic programming is designed on the second model. These studies were applied to the project THERMOS, a composite district heating power plant studied on this moment in CEA. (Atomindex citation 11:536050)