Steam turbine power plant

Abstract

Disclosed is a steam turbine power plant adapted to start operating very efficiently by highly accurate look-ahead control of a plurality of its startup constraints. The power plant includes a fundamental startup constraint prediction devicethat calculates from a control input variable of the controllera prediction period about a fundamental startup constraint which is short in response time, a reference control input variables calculating devicethat calculates such a reference control input variable of the controlleras the value predicted and calculated by the fundamental startup constraint prediction devicewill not exceed a limit value, other startup constraint prediction deviceseach calculating a corresponding prediction period of data about desired one of other startup constraints from the prediction period of reference control input variables data, other control input variable calculating deviceseach calculating corresponding other control input variables of the controllerfrom the value predicted and calculated by the other startup constraint prediction device, and a control signal output deviceorthat outputs a command value to the controllerin accordance with a value selected from the reference control input variable and the other control input variable.