JPS60175115A - Device for monitoring efficiency of plant - Google Patents

Abstract

PURPOSE:To remove a main factor causing the reduction of efficiency previously and to attain highly efficient operation by forecasting the calculation of efficiency deviation and the analysis of factors. CONSTITUTION:A reference efficiency calculating device 4 and a highly efficient operation designating device 10 are added to a plant efficiency monitoring device. The plant efficiency and a forecasting value of reference efficiency after a fixed period are calculated from outputs of a data collecting device 1 or the like by a plane efficiency forecasting device 6, the efficiency deviation is calculated by an efficiency deviation calculating device 7 and the plant state value and the forecasting value of the reference value are calculated by a plant state value forecasting device 8. On the basis of these forecasting values, respective devices 7, 9, 10 output operating specifications or the like for optimum and an output device 3 makes the operator recognize the operating specifications, so that proper processing can be executed precedently.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a device for monitoring the operating efficiency of a plant operated by computer control.

[Prior art]

FIG. 1 is a block diagram showing the configuration of a conventional device, in which (11 is a data collection device, (21 is a plant efficiency calculation device), and (3) is an output device.

Various status signals from the plant, such as temperature, pressure, fuel amount, production amount, etc., are input to the data collection device (11), and are subjected to average value calculation, integrated value calculation, rate of change calculation, smoothing processing, etc. as necessary. , performs pre-calculation to perform efficiency calculation.The data on which this pre-calculation has been performed is input to the plant efficiency calculation device (2), and based on this data, the current point in time is determined from the relationship of input and output amounts. The efficiency of each part and the overall efficiency are calculated and printed or displayed by an output device.

Conventional plant efficiency monitoring equipment is configured as described above, so it is possible to know the efficiency at the current point in time, but it is difficult to determine whether the efficiency is a reasonable level that can be achieved under the current environmental conditions. I can't. In addition, when efficiency is low, it is difficult to determine the cause of the problem, making it difficult to take corrective action and delaying corrective measures. Furthermore, the deviation of future efficiency from the standard efficiency and the cause of that deviation cannot be predicted, and the point at which efficiency actually declines is 1.
The disadvantage was that it was not possible to know the cause.

[Summary of Yumei]

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and in this invention, the efficiency IT calculation device includes a plant efficiency calculation device that calculates the plant efficiency at the current point in time, and a plant efficiency calculation device that calculates the plant efficiency at the current point in time. A standard efficiency calculation device that calculates the standard efficiency that can be achieved by tJl, and a plant state quantity standard calculation device that calculates the standard amount that can be reached under the current environmental conditions of the main plant state quantities that are the main variables that determine plant efficiency. The system calculates the difference in efficiency from the current reference value from the output of these calculation devices, analyzes the causes of the deviation, provides guidance on eliminating the dominant causes of deviation, and further predicts future efficiency. The purpose of the present invention is to provide a plant efficiency monitoring device that can provide guidance to maintain optimum plant efficiency by performing the following steps.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

Figure 2 is a fruit of this invention 77+! This is a block diagram showing one example. The same reference numerals as in Figure 3.1 indicate the same or equivalent parts, and (
4 is a standard efficiency calculation device, (5) is a plant condition lid standard calculation device, (61 is a plant efficiency prediction device, (7) is an efficiency deviation 3↑ calculation device, :8) is a flant condition wax prediction device,
(9) is a deviation factor analysis device, and 110) is a sieve efficiency achievement indicator device.

The parts ill, +21, and +31 are the same as the parts with the same symbols in Figure 1! commit fraud. However, output device M
+31 may also output a sound threat number in the case of a broadcast output temple.

Standard efficiency = r Poetry 6 device (41 inputs the output of the data collection device 111 to calculate the standard efficiency that can be achieved under the current environmental conditions. For example, the current atmospheric temperature, atmospheric pressure, atmospheric temperature, seawater temperature, etc. The standard efficiency is calculated from the operating conditions such as the ambient conditions and the number of operating vehicles (these conditions are collectively referred to as the environmental conditions before this specification).

The plant state quantity standard calculation device (5) calculates reference values that can be reached under the current environmental conditions for main plant state quantities, such as main steam temperature and main steam humidity, which are the main variables that determine plant efficiency.

In the plant efficiency prediction device (6), the data collection device (1)
, plant efficiency calculation device (2), standard efficiency calculation device (4)
1 is input, and the predicted values of the plant efficiency and standard efficiency after a certain period of time are calculated from the past and current values of those values. The efficiency deviation meter p device (7) inputs the outputs of the plant efficiency calculation device (2), the standard efficiency calculation device (41, and the plant Tano J rate prediction device +61) and calculates the efficiency deviation at the present time and at the time after the above-mentioned certain period of time. .

Plant status prediction device (81 is data collection device (1)
and the plant state quantity standard calculation device (51) inputs the output of the actual plant state quantities and their reference values at the present time, and the predicted values of these values after the above-mentioned certain period of time, and calculates the past and present values of these variables. Calculate from.

The deviation factor analysis device (9) inputs the outputs of the efficiency deviation calculation device (7) and the plant state quantity prediction device +81, and calculates the deviation at the present moment and at the time after the above-mentioned fixed time for each plant state quantity that affects plant efficiency. Based on the degree of influence on the plant efficiency, the primary cause of the plant efficiency deviation at the present time and at the time after the above-mentioned certain period of time is calculated.

High-efficiency operation instruction device (lO) is a deviation cost analysis device jrlH
(The output of the above data is manually generated, analyzes the first to seven second-order factors of efficiency deviation, and outputs the causes of the second-order factors and operational instructions for optimizing them.

The output device (3) outputs an efficiency deviation calculation device (7), a deviation factor analysis device (9), and a high efficiency operation instruction device (suitable for making the operator recognize the output of itυ) in the form of a signal.

As a result of the above, high efficiency f is achieved not only now but also in the future.
Appropriate measures can be taken to prevent the injury from occurring in advance. In addition, it is possible to avoid unreasonable 1st turn notes on plant equipment, so plant 1
It is possible to achieve longer lifespans and safer and more stable plant operation.

In addition, in the above-mentioned example, instructions to the operator were outputted through the high-efficiency operation instruction device (1) (output device (3)), but the control signal was directly sent from the high-efficiency operation instruction device 11Ul to the control computer. Optimal control can be performed by inputting all the inputs.

Further, the output device (31) can output a warning to call the operator's attention when the current and future deviations exceed a threshold value.

〔Effect of the invention〕

As described above, the present invention is configured to predict and perform the efficiency deviation meter 17 and device analysis, so that the efficiency deviation at the monitoring time and future time and its main factor are calculated, and the efficiency decrease is detected. By eliminating the main factors that cause problems in advance, you can always achieve highly efficient operation, save fuel in your plant, and
Stable production volume, output, etc. can be achieved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a conventional device, and FIG. 2 is a block diagram showing an embodiment of the present invention. (1)...Data collection device, (21...Plant efficiency meter/j4- device, (31...Output device, +41...
・Standard efficiency calculation device, (5th...Plant state quantity standard calculation device, 16)...Plant efficiency prediction device, (
7) Efficiency deviation calculation device: 81 Plant state quantity prediction device, (9) Deviation factor analysis device, 11O
)... Highly efficient operation instruction device. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent: Masuo Oiwa Plant procedural amendment (spontaneous) Mr. Commissioner of the Japan Patent Office 1, Indication of case: Japanese Patent Application No. 1983-031198 2,
Name of the invention Plant efficiency monitoring device 3, Relationship with the amended person case Patent applicant address 2-2-3 Marunouchi, 113-ku, Chiyo, Tokyo Name (ω1) Mitsubishi Electric Corporation Representative Hitoshi Katayama Department 4. Agent 5, subject of amendment (1) Detailed explanation of the invention before the specification (1) Page 3 of the specification, lines 8 to 9, ``Average calculation integrated value calculation rate of change "Calculation smoothing processing, etc." has been corrected to "average value instrument, integrated value calculation, rate of change calculation, smoothing processing, etc." (2) In the second line of page 5 of the same book, the phrase "efficiency monitoring" is corrected to "efficiency monitoring."(that's all)

Claims (1)

[Claims] A data collection device that inputs various status signals from a plant controlled by a computer, performs necessary processing, and outputs them, and calculates the current efficiency of the plant by inputting the output of this data collection device. A plant efficiency calculation device that inputs the output of the above data collection device to calculate the standard efficiency that the plant can reach under the current environmental conditions, a standard efficiency calculation device that inputs the output of the above data collection device to calculate the standard efficiency Plant state 111 standard measurement that calculates the reference area that can be reached under the current environmental conditions of the main plant state quantity that is the main variable to be determined. inputting the output of the data collection device, the output of the plant efficiency calculation device, and the output of the standard efficiency calculation device to calculate a predicted value of the output after a certain period of time of the plant efficiency gt field device and the standard efficiency calculation device. Input the plant efficiency prediction device to be calculated, the output of this plant efficiency prediction device, the output of the plant efficiency calculation device, and the output of the standard efficiency calculation device to calculate the deviation from the standard efficiency of the efficiency at the current time and after the certain period of time. Efficiency deviation calculation device that calculates
A plant state quantity prediction device that manually calculates the predicted amount of the main plant quantity after the certain period of time by manually using the output of the data collection device and the output of the plant state quantity standard calculation device, the output of this plant state quantity prediction device and a deviation analysis device that inputs the output of the efficiency deviation calculation device and determines the cause of the efficiency deviation.The output of this deviation factor analysis device is manually used to generate a command signal for high efficiency operation. The operation instruction device, the output of this efficiency interlock instruction device, the tabata of the efficiency deviation d1 calculation device, and the deviation analysis device 〆t
A plant efficiency monitoring device equipped with an output device that displays or prints the output of the system and outputs it as an audio signal.