Patent ID: 6681155
Filing Date: 2004-01-20
Classification: G05B,H02J,Y02E,Y04S

Abstract:
An optimizing control method, for use in a power plant including a plurality of parallel-operated generating elements supplying electricity and steam, to control the generating elements by using an optimum load distribution while satisfying a balance between demand and supply of the electricity and the steam, said method comprising the steps of:estimating parameters of characteristics and state of the generating elements, which cannot be directly measured, among parameters of the generating elements needed for calculation of the optimum load distribution for each of the generating elements, based on a physical model of each of the generating elements and an input process state quantity; and controlling each of the generating elements by determining an optimum load distribution for the each of the generating elements while using the estimated parameters of the each of the generating elements, to minimize a total cost of the power plant, wherein the physical model includes steam enthalpies of steam inlet and steam outlet.