System and method for estimating a condensate water flow using cycle efficiency of steam turbine and heat absorption rate of boiler in power plant

摘要

The present invention is a power plant capable of estimating a discharge reference flow rate using steam turbine cycle efficiency and boiler tube heat absorption rate for a condenser that cools and condensates steam used in a steam turbine in a power plant by heat exchange with cooling water and returns it to water. It relates to a method and system for estimating the reference flow rate of condenser discharge. A power plant condenser discharge reference flow rate estimation system according to the present invention comprises: a feed water pump for supplying cooling water; A boiler that generates superheated steam by applying heat to the cooling water supplied from the feed water pump; A steam turbine rotating by receiving superheated steam generated from the boiler; A generator that generates electricity by using the rotational force of a steam turbine; A condenser for condensing the exhaust steam discharged from the outlet of the steam turbine and converting it into water; During the acceptance test and precision performance test, the boiler tube heat absorption rate and steam turbine cycle efficiency obtained by measuring the boiler and steam turbine with a flow meter with a certain level of precision or higher in a state where there is no leakage of the front and rear valves through system isolation are measured. A database each storing at least one piece of data; And a control device for estimating the reference flow rate at the outlet of the condenser using the boiler tube heat absorption rate and steam turbine cycle efficiency stored in the database with respect to the reference flow rate discharged from the outlet of the condenser.