| 摘要 |
Apparatus and method of monitoring the performance of a steam power plant, wherein the monitoring is made through a calculation of the performance from detected data representing the states of operation of various parts of the plant, such as feedwater flow rate, steam pressure, steam temperature and the level of the load imposed on the plant. The method has a function for judging the fluctuation of the load and a function for judging the duration of steady state of the load. When the rate of fluctuation of the load is below a predetermined reference and this state of load lasts over a predetermined time length, it is judged that the data detected during this time length are valid as the data for monitoring of the performance and the performance is calculated from these data to permit the monitoring. The apparatus comprises a first comparator for comparing the rate of fluctuation of the load detected by the detector for detecting the load with a predetermined reference value, a second comparator for comparing the detection duration or time length of the detection obtained from the detector for detecting the load with a predetermined reference value, and judging means adapted to permit the detected data to be delivered to the plant performance calculation means for the calculation of the heat rate of the plant, in accordance with the outputs from the first and the second comparators, when the rate of fluctuation of the load is below the level of the reference value and this state of the load lasts over a predetermined time length.
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