PURPOSE: To enable the operating condition of each equipment to be accurately monitored even in such an operating condition as requiring an output change by making a comparison between a predicted output signal value calculated through the application of an equipment input signal to a transfer function and an actual measurement value, and making judgement about the occurrence of an error according to the result of the comparison.
CONSTITUTION: For example, a raked tube position signal 3 and an MG set generator speed signal 5 are continuously read from a plant at a constant period through an A/D converter 7. The predicted value of the MG set generator speed is computed from the read signal 3' in a prediction arithmetic device 9 on the basis of a predictive model prepared with a predictive model preparation device 8. Thereafter, an error judgement device 10 compares a deviation between the predicted value of the MG set generator speed and an actual measurement value 5', with the predetermined value, thereby making judgement as to whether equipment 1 under monitoring is normal or not. Namely, when the deviation exceeds the predetermined value, the device 10 judges that the equipment 1 is abnormal and an alarm is outputted from an alarm unit 11. According to the aforesaid construction, the operating condition of equipment can be efficiently monitored, even in the condition where the output level of equipment frequently fluctuates as in the case of a load follow-up operation, and an operator's monitoring work can be alleviated.
KANEMOTO SHIGERU
EHATA SHIGEO
