JP2000075922A - Plant operation state monitor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a human's misjudgement such as a misunderstanding and a mistake by storing and holding sequentially inputted process data for a specific time and comparing current process data and past process data with each other. SOLUTION: A process data input part 2 converts different kinds of input process data into a data format that a supervisor 11 can easily understand and writes the data as current process data 3a in a data buffer 3. The current process data 3a is inputted to a process data storage part 4 and written to a data storage part 5. The storage part 5 has storage capacity which is large enough to store the sequentially written current process data 3a for a specific time, e.g. one hour. A process data comparison part 8 compares the current process data 3a with past process data 5a which is the specific time before, and a coincidence/discrepancy or large/small comparison result 8a is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant operation state monitoring device for monitoring a plurality of types of process data sequentially output from various plants.

[0002]

2. Description of the Related Art In a plant operation state monitoring device for monitoring the operation state of various plants, for example, the number of rotations, speed, flow rate, opening, etc., indicating the operation state of the corresponding equipment attached to a large number of equipments incorporated in each plant. ON / OFF of the corresponding device
A large number of process data such as OFF state, normal / failure state, and voltage, current, power, water level, temperature, and humidity obtained by each measuring instrument are provided at the central monitoring center using various signal lines and communication lines. Are sequentially transmitted to the monitored plant operation state monitoring device.

The data format of the process data includes a digital data format indicating a physical quantity, an analog data format, and a binary data format such as an on / off state of a device.

[0004] In the plant operation state monitoring device, a predetermined arithmetic processing is performed on a plurality of types of process data sequentially input from the above-mentioned various plants to convert them into a unit or a physical quantity that can be easily understood by a monitor. Then, for example, the operation state of the plant is displayed and output on a large display panel or a CRT display device. Then, the observer displays the sign or CR
Monitor the operation status of the plant displayed on the T display device,
When an abnormality is found, countermeasures are taken against this abnormality.

[0005]

However, in such a plant operating state monitoring device, the display panel or C
The determination of whether the operating state of the plant displayed on the RT display device is normal or abnormal has been performed based on years of experience and intuition of the monitor.

As a result, there has been a problem that the probability of occurrence of an artificial judgment error due to a misunderstanding or a misunderstanding increases. In addition, when a plurality of observers alternately perform monitoring work, there is an individual difference in the criterion of abnormal or normal. In addition, since the judgment of normal / abnormal was made based on years of experience and intuition,
There is also a problem that a person unfamiliar with this monitoring work cannot carry out monitoring.

In order to eliminate such inconvenience, it has been proposed to refer to a past plant operating state in order to determine whether the current plant operating state is normal or abnormal. That is, the current plant operation state is displayed, and the plant operation state is recorded and held in, for example, a hard copy or a memo. Then, the current plant operation state is compared with the past plant operation state described in a hard copy or a memo collected in the past, and the normal / abnormal state is determined from the difference.

Therefore, there is a problem that the normal / abnormal state of the plant operation cannot be immediately determined. Furthermore, even in this method, it is not possible to eliminate occurrence of artificial judgment errors due to misunderstandings or misunderstandings.

Further, an enormous number of process data are displayed on a display panel or a CRT display device. These process data include those that are very important to the operation of the plant and those that are not so important, but for those who are unfamiliar with monitoring operations, they cannot distinguish at a glance their importance. Therefore, when important process data and less important process data show a tendency to contradict each other, there is a concern that an erroneous determination may be made.

The present invention has been made in view of such circumstances, and by storing process data sequentially input from each plant for a predetermined time, the present process data and the past process data can be easily obtained. To provide a plant operation status monitoring device that can minimize the occurrence of human error such as misunderstanding or misunderstanding, and can easily perform monitoring work even if you are unfamiliar with monitoring work. The purpose is to do.

Further, by enabling the type of process data to be compared and settable, it is possible to centrally monitor only process data that is important for plant operation, and to reduce the mental burden on the supervisor. The purpose is to provide.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a plant operation state monitoring device for monitoring a plurality of types of process data sequentially output from various plants. A process data storage means for storing process data in a time series for a predetermined time, and a process data stored in the process data storage means and a corresponding one of a plurality of process data of a plurality of types of process data which are sequentially output. Data comparison means for comparing with process data, and comparison result output means for outputting a comparison result of the data comparison means are provided.

In the plant operating state monitoring apparatus thus configured, a plurality of types of process data sequentially output from various plants are stored and retained in a time series for a predetermined time. Then, the current process data is compared with the process data before the predetermined time, and, for example, a result of comparison of match / mismatch and a comparison of large / small is output.

Therefore, the supervisor can easily determine whether the current process data is normal or abnormal based on the comparison result. In another aspect of the present invention, the plant operating state monitoring device of the above-described invention further includes a comparison condition setting means for setting a combination of a plurality of types of process data input from the outside as a comparison condition, A comparison condition storage unit for storing the comparison condition set by the setting unit is added. The data comparing means compares the type of process data indicated by the comparison condition stored in the comparison condition setting means.

In the plant operating state monitoring apparatus thus configured, all the process data output from various plants are not compared with the corresponding process data before a predetermined time, but are set by the comparison condition setting means. Only the process data of the given type are compared.

Therefore, by setting only the process data of a type important to the plant operation as the comparison condition, the supervisor can focus only on the comparison result of the process data of the type important to the plant operation. Because monitoring is enough, the burden on observers is reduced,
Human judgment errors in plant monitoring can be minimized.

In still another aspect of the present invention, the plant operation state monitoring apparatus according to each of the above aspects further includes an allowance for setting an allowable range of a change from a predetermined time to the present in each process data based on an external instruction. A range setting unit and a permissible range storage unit for storing the permissible range set by the permissible range setting unit are added. The data comparison means compares the current process data with the upper limit value and the lower limit value of each process data created a predetermined time before using the allowable range stored in the allowable range storage means. I have.

In the plant operating state monitoring apparatus configured as described above, when comparing each current process data with each process data before a predetermined time, an allowable range is provided for each process data.

Then, it is compared whether or not each of the current process data falls within a range composed of an upper limit value and a lower limit value created in consideration of an allowable range. Therefore, by setting an optimum allowable range for each type of each process data, more reliable monitoring of the plant operation state can be realized.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a block diagram showing a schematic drawing of a plant operating state monitoring apparatus according to a first embodiment of the present invention.

A plurality of types of process data sequentially output at a fixed period T of, for example, 1 second from various plants constituting the plant group 1 are input to a process data input unit 2 in the plant operation state monitoring apparatus. . The process data input unit 2 converts the input plurality of types of process data into a data format that can be easily understood by the monitor 11, and converts the process data into the data buffer 3 as the current process data 3 a.
Write to The data buffer 3 has a storage capacity capable of storing the inputted current process data 3a for one cycle T.

Therefore, the current process data 3a written in the data buffer 3 is read by the current process data reading section 6 as it is after a lapse of one second as the current process data 3a.

The current process data 3a output from the process data input unit 2 is written to the data buffer 3 and input to the process data storage unit 4. The process data storage unit 4 stores the input current process data 3a in a data storage unit 5 as a process data storage unit.
Write to The process storage unit 5 has a storage capacity capable of storing the current process data 3a sequentially written in the cycle T for, for example, one hour as a predetermined time. For example, when the fixed period T is one second, the memory has a storage capacity capable of storing 3,600 process data.

Specifically, for example, the data storage unit 5 is constituted by a FIFO memory having 3600 registers. Therefore, the current process data 3a written in the data storage unit 5 is stored for one hour (predetermined time).
Later, the past process data reading unit 7 reads the past process data 5s.

Note that the past process data reading unit 7
It is also possible to read out process data stored in the data storage unit 5 for an arbitrary elapsed period (storage period, comparison cycle). For example, it is also possible to read out the past process data 5a 30 minutes after the writing time. In addition, if necessary, the type of process data (data name)
Can also be specified for reading. This elapsed period (storage period, comparison cycle) is instructed by the next process data comparison unit 8.

Here, the current process data 3a output from the process data input unit 2 and written in the data buffer 3 at every predetermined period T such as one second is, for example, shown in FIG.
It is configured as shown in FIG.

That is, in the plant operation state monitoring apparatus of this embodiment, the above-mentioned plurality of types of process data sequentially output from various plants include DI data,
The data is classified into three types of data, ie, PV data and SUM data, and arranged.

Next, the structure of each data shown in FIG. 2 will be described. (1) DI Data The DI data is digital data of a 2-bit configuration as a binary data format such as an on / off state of a device and a normal / failure state among a plurality of types of process data described above. [1, 0, 1, 1,...] Indicate that the first device is on, the second device is off, and
Indicates that the th device is on. (2) PV data The PV data includes speed, flow rate, opening degree, voltage, current, water level, temperature,
Indicates that the data is originally analog data such as humidity rate.
The data of one measuring instrument is indicated by a numerical value of 3 to 5 digits. For example, [10242,2343, ...] indicates that the first measurement is the flow rate per second 10242 ² shows that the second measured value is the flow rate per second 2343 ^2. (3) SU data This SU data indicates that it is integrated data such as integrated power and integrated flow rate among the above-described plurality of types of process data. The data of one integrator is indicated by a four-digit numerical value. For example, [2067, 8745,...
The second integrated value is 2067, and the second integrated value is 8745.

The current process data reading section 6 sends the current process data 3a sequentially read from the data buffer 3 at one second intervals to the next process data comparing section 8. Similarly, the past process data reading unit 7 includes the data storage unit 5
For example, the past process data 5a of, for example, one hour before, which is sequentially read out at intervals of one second, is sent to the next process data comparing unit 8.

The process data comparing section 8 has a condition memory 9
Is connected. As shown in FIG. 4, the condition memory 9 stores a comparison cycle (a storage time in the data storage unit 5) that specifies how much the current process data 3a is compared with the previous process data 5a. ing.

The process data comparing section 8 instructs the past process data reading section 7 of the comparison cycle stored in the condition memory 9 and, as shown in FIG. The data 3a is compared with the past process data 5a to determine the presence / absence of a difference for each type of process data, and the determination result is sent to the next comparison result output unit 10 as a comparison result 8a. The sequentially input current process data 3a is also sent to the comparison result output unit 10 as it is.

As shown in FIG. 5, the comparison result output unit 10 outputs the comparison result 8a indicating the presence / absence of the difference and the current process data 3a on a display screen of the CRT display device 12, for example. Further, when the comparison result 8a indicates a difference, a warning is output to the monitor 11 by the speaker 13 or a message is output to the paper 14.

In the plant operating state monitoring apparatus of the first embodiment configured as described above, a plurality of types of process data sequentially output from various plants constituting the plant group 1 are compared as the current process data 3a as they are. At the same time, the data is stored in the data storage unit 5 in chronological order for a predetermined time, and is input to the process data comparison unit 8 as past process data 5a.

As a result, the process data comparison section 8 compares the current process data 3a with the past process data 5a of a predetermined time, such as one hour, for example. Then, for example, a match / mismatch or a large / small comparison result 9 is output.

Therefore, the plant operation monitor 11
Can easily determine whether the current process data is normal or abnormal based on the comparison result 8a. (Second Embodiment) FIG. 6 is a block diagram showing a schematic drawing of a plant operating state monitoring apparatus according to a second embodiment of the present invention. The same parts as those of the plant operation state monitoring device according to the first embodiment shown in FIG. Therefore, the detailed description of the overlapping part will be omitted.

In the plant operation state monitoring apparatus of the second embodiment, the process data comparison pattern setting unit 1 operated by the manager 15 of the plant operation state monitoring apparatus
6 are provided. Further, in the condition memory 9, in addition to the comparison cycle (the storage period of the past process data 5a) 18a described in the first embodiment, a comparison condition 18b relating to the current process data 3a, and the process data comparison pattern setting unit A plurality of process data comparison patterns 17 set by 16 are stored.

Next, the process data comparison pattern 17 set by the process data comparison pattern setting section 16 will be described. As described above, the plant operation state monitoring device receives numerous types of process data from a large number of plants constituting the plant group 1 and outputs the current process data 3a to the CRT display device 12 at the comparison result output unit 10.
Are displayed and output together with the respective comparison results 8a on the display screen.

However, some of the process data displayed on the display screen of the CRT display device 12 include data that is very important for plant operation and data that is not so important.

Therefore, the manager 15 of the plant operation state monitoring device defines a plurality of process comparison patterns 17 that collect a plurality of relatively important process data and sets them using the process comparison pattern setting unit 16.

Each of the plurality of process comparison patterns 17 can be arbitrarily combined using various input process data. For example, one process comparison pattern 17 can be composed of only relatively important common process data of the same type in a plurality of plants constituting each plant group 1. Further, another process comparison pattern 17 is
It can be composed of a plurality of relatively important types of process data in a specific plant.

As described above, a plurality of process data comparison patterns 1 set by the manager 15 of the plant operation state monitoring apparatus using the process data comparison pattern setting unit 16 are set.
7 is written to the condition memory 9. The plurality of process data comparison patterns 17, comparison cycles 18 a and comparison conditions 18 b written in the condition memory 9 are sent to the process data comparison unit 8.

As shown in FIG. 7, the process data comparing section 8 compares the comparison cycle (storage time) read from the condition memory 9.
18a to the past process data reading unit 7 and the comparison condition 16b read from the condition memory 9 to the current process data reading unit 6. When the above preparation processing is completed, the process data comparing unit 8 Of the current process data 3a sequentially input at one-second intervals from the current process data reading unit 6 and the current process data 3a sequentially input at one-second intervals from the past process data reading unit 7, each read from the condition memory 9 Only the process data of the type specified by the process data comparison pattern 17 is extracted.

Then, the process data comparing section 8 calculates the current process data 3 in the extracted process data.
a is compared with the past process data 5a. Then, the process data comparing unit 8 collects the comparison result 8a for each process data comparison pattern 17 and sends it to the comparison result output unit 10.

The process data comparing section 8 also sends all the current process data 3a read from the current process data reading section 6 to the comparison result output section 10. The comparison result output unit 10 outputs the comparison result 8a indicating the presence / absence of a difference for each process data comparison pattern 17 shown in FIG. 8 and the current process data 3a, for example, to the CRT shown in FIG.
The display is output on the display screen of the display device 12. Further, when the comparison result 8a for each process data comparison pattern 17 indicates a difference, a warning is output to the monitor 11 by the speaker 13 or a message is output to the paper 14.

In the plant operating state monitoring apparatus according to the second embodiment configured as described above, the current process data 3a of all the process data output from the various plants constituting the plant group 1 is set to a predetermined time such as one hour. Instead of being compared with the previous corresponding past process data 5a, only the type of process data set in each process comparison pattern 17 set by the process data comparison pattern setting unit 16 is compared.

Therefore, the manager 15 of the plant operation state monitoring apparatus sets only the process data comparison pattern 17 composed of process data of a type important for plant operation in the condition memory 9, whereby the monitor 11 Therefore, only the comparison result 8a of the process data of an important type for the plant operation needs to be monitored mainly, so that the burden on the monitor 11 is reduced,
Human judgment errors in plant monitoring can be minimized.

In particular, as in the case of a wide area plant system such as a water supply system or a sewer system, a plurality of plants constituting the plant group 1 are arranged at remote locations from each other, and are arranged at an urban management center. When the operation state monitoring device remotely monitors plants in various places, as described above, the process data such as the outflow amount and the inflow amount common to each plant are collectively incorporated into one process data comparison pattern 17. With such a configuration, the monitor 11 can compare the operating states of the plants in various places at a glance.

(Third Embodiment) FIG. 9 is a block diagram showing a schematic drawing of a plant operating state monitoring apparatus according to a third embodiment of the present invention. The same parts as those of the plant operation state monitoring device according to the second embodiment shown in FIG. 6 are denoted by the same reference numerals. Therefore, the detailed description of the overlapping part will be omitted.

In the plant operation state monitoring device of the third embodiment, a process data condition setting section 19 operated by a manager 15 of the plant operation state monitoring device is provided. Further, in the condition memory 9, the comparison cycle (the storage period of the past process data 5a) 18a and the current process data 3 described in the first and second embodiments are stored.
a in addition to the comparison condition 18b and the plurality of process data comparison patterns 17,
A plurality of allowable ranges 20 set in 9 are stored.

The administrator 15 of the plant operating state monitoring device
Sets a plurality of process data comparison patterns 17 to the process data condition setting unit 19 as in the case of the plant operation state monitoring device of the second embodiment,
For each process data comparison pattern 17, an allowable range of change from one hour before (predetermined time) to the current time in each process data included in the corresponding process data comparison pattern 17 is individually set.

Note that this allowable range is represented by an actual value or a ratio (percent). In other words, the types of each process data output from each plant are various, and regardless of the binarized data, even if the physical data is controlled to a constant value, it will change slightly if verified in detail. I have. The permissible range of the change differs for each process data. Therefore, in the process data condition setting section 19, the permissible range can be set for each process data.

The process data condition setting section 19 writes the plurality of process data comparison patterns 17 set by the administrator 15 and the plurality of allowable ranges 20 corresponding thereto in the condition memory 9. The plurality of process data comparison patterns 17, the plurality of allowable ranges 20, the comparison cycle 18a, and the comparison condition 18b written in the condition memory 9 are stored in the process data comparison unit 8.
Sent to

As shown in FIG. 10, the process data comparison unit 8 instructs the comparison process (storage time) 18a read from the condition memory 9 to the past process data reading unit 7 and reads the comparison cycle (storage time) from the condition memory 9. The comparison condition 18b is instructed to the current process data reading unit 6.

When the above preparation processing is completed, the process data comparing section 8 sets the current process data 3 sequentially inputted from the current process data reading section 6 at one second intervals.
a and the current process data 3a sequentially input at one-second intervals from the past process data reading unit 7 to extract only the process data of the type specified by each process data comparison pattern 17 read from the condition memory 9.

Then, the process data comparison unit 8 compares the extracted past process data with the condition memory 9.
The upper limit value and the lower limit value of the corresponding process data are calculated using the allowable range corresponding to the relevant process data read from.

The current process data 3a and the past process data 5a in the extracted process data
By comparing the upper limit value and the lower limit value calculated using the above, if the current process data is within the allowable range formed by the upper limit value and the lower limit value, it is determined that there is no difference, and the current process data is determined by the upper limit value. If the value falls outside the allowable range formed by the lower limit and the lower limit, it is determined that there is a difference. Process data comparison unit 8
Collects the comparison result 8a for each process data comparison pattern 17 and sends it to the comparison result output unit 10.

The process data comparing section 8 also sends out all the current process data 3a read from the current process data reading section 6 to the comparison result output section 10. The comparison result output unit 10 displays the comparison result 8a indicating the presence / absence of a difference for each process data comparison pattern 17 shown in the condition memory 9 and the current process data 3a on the CRT display device 12 shown in FIG. Output to the screen. Further, a comparison result 8 for each process data comparison pattern 17
If “a” indicates a difference, a warning is output to the monitor 11 by the speaker 13 or a message is output to the paper 14.

In the plant operation state monitoring apparatus of the third embodiment configured as described above, all the current process data 3a output from the various plants constituting the plant group 1 are stored in the corresponding past process data before a predetermined time. 5
Instead of being compared with a, only the type of process data set in each process data comparison pattern 17 is compared. Therefore, the same effects as those of the above-described plant operation state monitoring device of the second embodiment can be obtained.

Further, in the plant operation state monitoring apparatus of the third embodiment, when comparing the current process data 3a with the past process data 5a, the current process data 3a is set in an allowable range with respect to the past process data 5a. 20 are compared with each other to determine whether they fall within a range formed by an upper limit value and a lower limit value.

Therefore, by setting the optimum allowable range for each process data of each process data comparison pattern 17, more reliable monitoring of the plant operation state can be realized.

[0061]

As described above, in the plant operating state monitoring apparatus of the present invention, the process data sequentially input from each plant is stored and held for a predetermined time, and the present process data and the past process data are stored. Are compared. Therefore, it is possible to minimize the occurrence of an artificial judgment error such as a misunderstanding or a misunderstanding by the observer, and even if the person is unfamiliar with the monitoring operation, the monitoring operation can be easily performed.

Further, the type of process data to be compared can be set, and an allowable range for comparing the current process data with the past process data is set. Therefore, only process data important for plant operation can be centrally monitored, the mental burden on the supervisor can be reduced, and the monitoring accuracy can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a plant operating state monitoring device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing current process data temporarily stored in a data buffer of the plant operation state monitoring device.

FIG. 3 is a diagram showing past process data stored in a data storage unit of the plant operation state monitoring device.

FIG. 4 is a diagram for explaining a comparison operation of a process data comparison unit in the plant operation state monitoring device.

FIG. 5 is a diagram for explaining an operation of outputting a comparison result of a comparison result output unit in the plant operation state monitoring device.

FIG. 6 is a block diagram showing a schematic configuration of a plant operation state monitoring device according to a second embodiment of the present invention.

FIG. 7 is a diagram for explaining a comparison operation of a process data comparison unit in the plant operation state monitoring device.

FIG. 8 is a diagram showing a comparison result of a process data comparison unit in the plant operation state monitoring device.

FIG. 9 is a block diagram showing a schematic configuration of a plant operation state monitoring device according to a third embodiment of the present invention.

FIG. 10 is a diagram for explaining a comparison operation of a process data comparison unit in the plant operation state monitoring device.

[Description of Signs] 1 ... plant group 2 ... process data input unit 3 ... data buffer 3a ... current professional wrestling data 4 ... process data storage unit 5 ... data storage unit 5a ... past process data 6 ... present process data read unit 7 ... past Process data read unit 8 Process data comparison unit 8a Comparison result 9 Condition memory 10 Comparison result output unit 11 Monitor 15 Manager 16 Process data comparison pattern setting unit 17 Process data comparison pattern 19 Process data Condition setting part 20: allowable range

Claims (3)

[Claims] 1. A plant operation state monitoring device for monitoring a plurality of types of process data sequentially output from various plants, wherein the plurality of types of sequentially output process data is stored in a time series for a predetermined time. Means for comparing each process data in the plurality of types of process data which are sequentially output and each corresponding process data stored a predetermined time ago in the process data storage means; A plant operation state monitoring device comprising: a comparison result output unit that outputs a comparison result of the comparison unit. 2. A comparison condition setting means for setting a combination of a plurality of types of process data input from the outside as a comparison condition, and a comparison condition storage means for storing the comparison condition set by the comparison condition setting means. The plant operation state monitoring device according to claim 1, wherein the data comparison unit compares the type of process data indicated by the comparison condition stored in the comparison condition setting unit. 3. An allowable range setting means for setting an allowable range of a change from the time before the predetermined time to the present time in each of the process data based on an external instruction, and an allowable range set by the allowable range setting means. An allowable range storage unit, wherein the data comparison unit is configured to use the current process data and the allowable range stored in the allowable range storage unit, and to set an upper limit value of each process data before the predetermined time. The plant operation state monitoring device according to claim 1, wherein the plant operation state monitoring device compares the value with a lower limit value.