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Patent Searching and Data


Title:
COOPERATIVE CONTROL SYSTEM FOR ABNORMAL CONDITION
Document Type and Number:
Japanese Patent JPH11258390
Kind Code:
A
Abstract:

To make it possible to continue a stable operation by controlling a system to compensate the difference between the suction flow rate in an arbitrary feed water pump and a flow rate request signal with the flow rate of another normal waster feed pump.

In case of abnormal condition when the flow rate of a turbine drive feed water pump 1 decreases, the levels of a feed water flow rate signal 16 and a reactor water level signal 18 decrease and a water level correction signal 411 and a water level control signal 406 increase. Accordingly, a water level correction control signal 412 and a feed water flow rate request signal 414 increase. Then, a signal 526 for correcting the flow rate of a feed water pump 2 increases rapidly and the flow rate of the pump 2 increases to compensate the decrease in the flow rate of the feed water pump 1. Moreover, the control rod compensation and control device 600 in an automatic output regulator 200 conducts a PID calculation of a signal 530 for requesting the compensation of the flow rate of the feed water to increase a signal 601 for requesting the compensation of the reactor output. Subsequently, a control rod drive device 20 inserts control rods 21 to suppress lowering in the water level of a reactor caused by the decrease in a water level signal 402 for the feed water pump 1 in responces to a signal 414 for requesting the flow rate of a feed water pump.


Inventors:
SAKUMA HITOSHI
Application Number:
JP6645098A
Publication Date:
September 24, 1999
Filing Date:
March 17, 1998
Export Citation:
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Assignee:
HITACHI LTD
HITACHI ENG CO LTD
International Classes:
G21D3/04; (IPC1-7): G21D3/04
Attorney, Agent or Firm:
Ogawa Katsuo