CONTROL SYSTEM OF WATER FED TO DRUM STEAM GENERATOR Russian patent published in 2011 - IPC F22D5/26 

FIELD: power industry.

SUBSTANCE: system includes feed water flow control valve controlled with three-pulse stabilising regulator to which feed water flow sensor, steam flow sensor and drum water level sensor also connected to correcting regulator, are connected. Sensor of position of intermittent blowdown valve forms weakening signal through differentiator on stabilising regulator. Load sensor of power unit provides through two non-linear elements connected to the first and the second parametric inputs of stabilising regulator the dynamic operating accuracy of the system in control mode, and static accuracy is provided by means of the third parametric input to which feed water flow sensor is connected by means of the third non-linear element and steam flow sensor by means of the fourth non-linear element through adder.

EFFECT: improving dynamic operating accuracy during intermittent blowdown, as well as improving static operating accuracy and stabilising dynamic accuracy in control modes of steam generator operation by means of parametric adaptation of stabilising regulator, which allows the steam generator to participate in power control of power unit at more qualitative level.

1 dwg