JPH05303600A - Plant operation device - Google Patents

Abstract

PURPOSE:To provide the plant operation device which performs process control operation at proper timing without depending upon the sensation of an operator. CONSTITUTION:This plant operation device is provided with a target value input means 21 for inputting a process target value to be adjusted, a target value storage means 22 for storing the inputted target value, a required period of time calculating means 26 which calculates the required period of time till attainment to be target value from current value of a process, the flow rate of the process, and the target value, a lamp lighting control means 27 which judges operation timing for changing the operation state of process equipment 25 from the required period of till the target value I and transmits an operation guide lamp lighting signal, an operation guide lamp 28 which is lighted with the operation guide lamp lighting signal, display means 30-33 which display the target value, current value process flow rate, and the required period of time till the target value and an equipment operation means 29 with which an operation request signal is manually transmitted to the process equipment 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant operating device used for adjusting work of various processes in plants such as power plants and chemical plants.

[0002]

2. Description of the Related Art In recent years, monitoring operations in plants tend to be centralized in a central control room, and main work relating to plant operation can be performed on a control panel in the central control room. In the work on the control panel, the most burdensome work for the operator is the adjustment operation of various processes, and most of them are the flow rate adjustment of the pipe by the opening / closing operation of the valve.

FIG. 4 shows a process in which the water from the water source 1 can be transferred to the tank 3 by opening the valve 2. The operator reads the detection value of the sensor 4 installed in the tank 3 from the meter 7 installed in the control panel 5, and operates the valve 2 by the operation device 6 installed in the control panel 5 to adjust the water level in the tank 3. Set the target water level.

The work flow of the operator at that time is shown in FIG. As shown in this figure, the first step 11 of the work
Then, the margin for reaching the target water level is judged from the indicated value of the meter 7, the valve 2 is fully opened, and the water is continuously transferred to the tank 3 at the maximum flow rate. In the next step 12, when the indicated value of the meter 7 approaches the target water level, the valve 2 is set to an intermediate opening degree to reduce the flow rate. Then, in step 13, when the indicated value further approaches the target water level, the valve 2 is opened slightly and the water transfer to the tank 3 is continued at a small flow rate until the target water level is reached. Then, when the target water level is finally reached, the valve 2 is fully closed in step 14 to complete the work.

[0005]

As described above, in order to balance the process or transfer the fluid for a certain purpose, the operator manipulates the opening degree of the valve or the rotation speed of the pump to process the process. Adjust the condition.

[0006] However, the difficulty in such an adjusting operation is that it is difficult to predict how long it will take to reach a target process state as a result of the operation, that is, a device state after the operation. It is in. Since such time-based judgment conventionally depends on the sense of the operator, there is a clear difference in the time required to complete the operation depending on the timing at which the operation is executed.

FIG. 6 shows the relationship between the valve opening and the tank water level when the operation shown in FIG. 5 is performed in the process shown in FIG. In this figure, the results of operating at different timings are shown as a case a and a case b, and the operation timing from the valve fully open state (step 11) to the intermediate opening (step 12) shown in FIG. 5 is shown. T1
The operation timing from the intermediate opening (step 12) to the slight opening (step 13) is set to T2a for case a and T2b for the case b, and the operation timing from the slight opening (step 13) to the full closing (step 14) is completed. Is T3a for case a and T3b for case b. As shown in this graph, in case a, compared with case b, the operation timing from intermediate opening to fine opening is earlier by the time difference TT1, and therefore the transfer time in fine opening is longer,
As a result, a time difference of TT2 occurs at the operation end time.

The present invention has been made in consideration of the above circumstances, and provides a plant operating device which enables an operator to perform an operation at an appropriate timing by providing information necessary for the operator to measure the operation timing. The purpose is to

[0009]

In order to achieve the above object, the present invention provides a target value for inputting a target value of a plant process value in a plant operating device for operating a process equipment in order to adjust the plant process value. Input means,
A target value storage means for storing the target value input by this target value input means, and the current value of the plant process value and the flow rate of the process whose flow rate is controlled by the process equipment are respectively input from the process value sensor and the flow rate sensor, Required time calculation means for inputting the target value of the process value from the target value storage means, calculating the time required to reach the target value from these input data, and the required value up to the target value calculated by this required time calculation means From the time, determine the operation timing to change the operating state of the process equipment,
The lamp lighting control means for transmitting an operation guide lamp lighting signal at the determined operation timing, the operation guide lamp for lighting by the operation guide lamp lighting signal transmitted from the lamp lighting control means, and the target value storage means are stored. Display means that displays the target value of the process value, the current value of the process value from the process value sensor, the process flow rate from the flow rate sensor, and the required time to the target value calculated by the required time calculation means, and manually on the process equipment. A device operating means for transmitting an operation request signal is provided.

[0010]

In the above structure, the target value of the plant process value to be adjusted is input by the target value input means and stored in the target value storage means. The target value of the process value stored in the target value storage means is displayed on the target value display section of the display means. The current value of the plant process value to be adjusted is detected by the process value sensor and displayed on the current value display section of the display means. The flow rate of the process whose flow rate is controlled by the process equipment is also detected by the flow rate sensor and displayed on the flow rate display unit of the display means. The required time calculation means inputs the current value of the process value to be adjusted and the flow rate of the process from each sensor, and based on these values and the target value of the process value stored by the target value storage means, the process value is calculated. Calculates the time required to reach the target value and passes it to the lamp lighting control means. further,
The required time to the target value calculated by the required time calculation means is displayed on the required time display section of the display means. The lamp lighting control means determines the operation timing for changing the operation state of the process equipment by comparing the required time up to the target value notified from the required time calculation means with a preset reference time, and based on the determination result. Send the operation guide lamp lighting signal to turn on the operation guide lamp. By operating the device operating means, an operation request signal is transmitted to the process device to be operated.

Therefore, the operator can know the proper timing of the process adjustment operation from the required time to the target value displayed on the required time display section and the lighting of the operation guide lamp.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. INDUSTRIAL APPLICABILITY The plant operation device of the present invention is suitably used for process adjustment work in various power plants and chemical plants. An embodiment of the plant operating device is shown in FIG. In FIG. 1, 21 is a target value input unit for inputting target value data A1 of a plant process to be adjusted, and 22 is a target value storage unit for storing the target value data A1 input by the target value input unit 21. Reference numeral 23 is a process value sensor that detects the current value A2 of the process to be adjusted, 24 is a flow rate sensor that detects the process flow rate A3, and 25 is a process device that controls the process flow rate A3. 26 is the target value A1 of the process stored in the target value storage unit 22.
And a process value sensor 23 and a flow rate sensor, respectively, which are detection values A2 and A3, and calculates a required time A4 until the process value reaches a target value. The lamp lighting control unit 27 inputs the required time A4 up to the target value calculated by the required time calculation unit 26, determines the operation timing for changing the operating state of the process equipment 25, and issues the operation guide lamp lighting signal A5. Is. Reference numeral 28 is an operation guide lamp that is turned on by the operation guide lamp lighting signal A5 sent from the lamp lighting control unit 27, and 29 is an equipment operating unit that manually sends the operation request signal A6 to the process equipment 25. 30, 31,
Reference numerals 32 and 33 respectively indicate a target value display section for displaying the target value A1, a current value display section for displaying the current value A2 of the process value,
A required time display section that displays the required time A4 up to the target value,
It is a flow rate display unit that displays the flow rate A3 of the process. Further, 34 is a target value input unit 21, a target value display unit 30, a current value display unit 31, a required time display unit 32, and a flow rate display unit 3.
3 is a data input / display unit, and 35 is an operation unit including an operation guide lamp 28 and a device operation unit 29.

FIG. 2 shows an example of the data input / display section 34 and the operation section 35 on the control panel. Figure 1
The target value input unit 21, the target value display unit 30, the present value display unit 31, the required time display unit 32, and the process flow rate display unit 33 shown in FIG. 2 are incorporated in the data input / display unit 34 on the control panel of FIG. The operation guide lamp 28 and the device operation unit 29 shown in FIG. 1 are incorporated in the operation unit 35 on the control panel of FIG. The target value input unit 21 of the data input / display unit 34 includes, for example, a keyboard 41 for inputting numerical values, and the target value display unit 30, the current value display unit 31, the required time display unit 32, and the process flow rate display unit 33 are each digital. It is realized as an indicator. For example, an LED or a liquid crystal display is used for these digital indicators. Operation part 3
The operation guide lamp 28 of No. 5 is an increase lamp 42,
It is realized as the reduction lamp 43, and the device operation unit 29 corresponds to the operation tool 44 of FIG. 2.

Next, the operation of the plant operating device having the above structure will be described. The target value input unit 21 is composed of a numerical value input keyboard 41 as shown in FIG. 2, for example, and the operator inputs a target value to be set from the keyboard 41 and presses a setting button 45 to set the target value data A1.
Is stored in the target value storage unit 22.

The target value data A1 stored in the target value storage unit 22 is digitally displayed on the target value display unit 30 as shown in FIG.

In the required time calculation unit 26, when the target value A1 is set in the target value storage unit 22, the target value A1 and the current value A2 of the process detected by the process value sensor 23 and the flow rate sensor 24 and the process Time A from the flow rate A3 to the process value reaches the target value
Calculate 4. Required time A4 is, for example, target value: L1 current value: L2 flow rate per second: T tank liquid area: D change per second: ΔL = T / D required time to target value: S (second) = (L1-L2)
It can be obtained from / ΔL.

The required time A4 calculated by the required time calculation unit 26 in this manner is digitally displayed on the required time display unit 32. Similarly, on the display section of the control panel, the current value of the process and the flow rate of the process detected by the process value sensor 23 and the flow rate sensor 24 are digitally displayed on the current value display section 31 and the flow rate display section 33, respectively.

The lamp lighting control unit 27 inputs the required time A4 up to the target value calculated by the required time calculation unit 26. When the required time A4 is longer than a predetermined time, the target value is reached. If there is a sufficient time margin up to, the signal for instructing the increase of the flow rate, and the signal for instructing the decrease of the flow rate when the required time A4 becomes less than the predetermined time are respectively set as the operation guide lamp lighting signal A5. send.

In the operation guide lamp 28, the operation guide lamp lighting signal A5 transmitted from the lamp lighting control unit 27.
Is a signal instructing to increase the flow rate, the increase lamp 42 is turned on, and if it is a signal instructing to decrease the flow rate, the decrease lamp 4
3 lights up. These lamps indicate the operating direction of the operating device 44, and indicate that the operating device 44 is operated in the lamp lighting direction.

In the equipment operating section 29, when the operator operates the operating tool 44, the process equipment 25 is requested to operate, for example, "open" or "close" for a valve, or "increase" the rotational speed for a pump. An operation request such as "reduction" is transmitted as an operation request signal A6.

FIG. 3 is a flow chart showing an example of the flow of the process adjusting work when the plant operating device of the above embodiment is used. As shown in this figure, first, the target value data A1 of the process is input from the target value input section A2 (step 51). The operator confirms the lighting state of the operation guide lamp 28 (steps 52 and 53),
If the increase lamp 42 is lit, the operation instrument 44 is used to increase the flow rate (step 54). If the reduction lamp 43 is on, the operation instrument 44 is used to perform the flow rate reduction operation (step 55). Operation guide lamp 2
If none of 8 is turned on, the process equipment 25 is maintained in that state. This operation of confirming the lighting state of the operation guide lamp 28 (steps 52 and 53) and the flow rate changing operation (steps 54 and 55) are repeated, and it is finally determined that the current value A2 of the process has reached the target value data A1. At this point (step 56), the work is terminated.

The above-mentioned work flow shows a basic flow when the plant operating device of the present invention is used. For example, in order to finish the work in the shortest time, it is displayed in the required time display section 32. It is sufficient to constantly maintain the state of the process equipment 25 in the state immediately before the decrease lamp 43 is turned on while monitoring the required time A4.

As described above, according to the above embodiment, by inputting the target value data A1 from the target value input section 21, the required time A4 up to the target process value is displayed on the required time display section 32, Further, the operation guide lamp 28 announces the timing of the operation. Therefore, the operator can obtain the information necessary for measuring the operation timing in the process adjusting operation, and can perform the process adjusting operation at an appropriate operation timing.

[0024]

As described above, according to the present invention,
The operator can know the timing of the process adjustment operation from the lighting of the operation guide lamp and the time required to reach the target value displayed on the display means, and the process operation equipment is always operated at the optimum timing without depending on the operator's sense. Can be operated to satisfactorily adjust the process value.

[Brief description of drawings]

FIG. 1 is a block diagram showing a plant operating device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating data input on a control panel in the embodiment of FIG.
It is a figure which illustrates a display part and an operation part.

FIG. 3 is a flow chart showing an example of the flow of process adjustment work according to an embodiment of the present invention.

FIG. 4 is a diagram illustrating a configuration example of a process.

FIG. 5 is a flowchart showing an example of the flow of a conventional process adjustment work.

6 is a graph showing the results when the process adjustment work of FIG. 5 is performed on the process of FIG.

[Explanation of symbols]

 21 ... Target value input unit 22 ... Target value storage unit 23 ... Process value sensor 24 ... Flow rate sensor 25 ... Process equipment 26 ... Required time calculation unit 27 ... Lamp lighting control 28 .. Operation guide lamp 29 ..... Equipment operation 30 ........ Target value display 31 .... Current value display 32 ..... Required time display 33 ..... Flow rate display 34 .. Data input / display unit 35 …… Operating unit 41 ………… Numerical input keyboard 42 ………… Increase lamp 43 ………… Decrease lamp 44 ………… Operating device 45 ………… Set button

Claims (1)

[Claims] 1. A plant operating device for operating process equipment for adjusting a plant process value, comprising: a target value input means for inputting a target value of the plant process value; and a target value input by the target value input means. And a target value storage means for storing the current value of the plant process value and the flow rate of the process whose flow rate is controlled by the process equipment are input from the process value sensor and the flow rate sensor, respectively, and the process value from the target value storage means The required time calculating means for inputting a target value and calculating the required time to reach the target value from these input data, and the operation time of the process equipment from the required time to the target value calculated by the required time calculating means Judge the operation timing to change the state, and operate the operation guide lamp at the determined operation timing. A lamp lighting control means for transmitting a signal, the operation guide lamps and the target value of the stored process value to the target value storage means for lighting the operation guide lamp lighting signal sent from the lamp lighting control unit,
Display means for displaying the current value of the process value from the process value sensor, the process flow rate from the flow rate sensor, and the required time to the target value calculated by the required time calculating means, and an operation request to the process equipment manually A plant operating device comprising: a device operating means for transmitting a signal.