JP3113350B2 - System monitoring method and system monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system monitoring apparatus for monitoring a system such as a plant and diagnosing the system.

[0002]

2. Description of the Related Art Conventionally, for example, in a plant, a system monitoring apparatus individually monitors each plant state quantity. Here, the monitoring target is for the direct cause of the process such as temperature and pressure, and the monitoring is performed by the limit value for the analog amount and the monitoring of 1 or 0 for the digital amount.

[0003] The diagnosis is made by checking whether or not each plant state quantity falls within a predetermined abnormal range. When the plant state quantity falls within the abnormal range, the diagnosis is performed in accordance with the plant state quantity. , Alarm processing was individually performed.

[0004]

However, according to the above-mentioned prior art, it has not been possible to sufficiently carry out monitoring and alarming processes suitable for plant conditions. That is, for example, it is assumed that when the event A occurs in the plant, the plant must originally transition to the state B. However, in this case, according to the related art, it is impossible to monitor the occurrence of the event A and the plant state B.

That is, since it is only necessary to individually determine whether each state quantity of the plant is in an abnormal range, it is not possible to directly determine the normality of the state transition of the plant. .

Therefore, corresponding to each plant state quantity,
There has been a problem that only monitoring, diagnosis, and alarm processing can be performed individually, and it is difficult to determine the cause of the abnormality.

Accordingly, an object of the present invention is to provide a system monitoring device capable of directly determining the normality of a state transition of a plant.

[0008]

To achieve the above object,
The present invention is a system monitoring method for monitoring a system, in which a plurality of states of the system are stored in advance, and corresponding to the plurality of states of the stored system, of the elements constituting the system. When a given set of elements is specified and the corresponding system state occurs,
The normal state to be taken by the specified plurality of specified elements is stored, and when the system is monitored, the state of the system is monitored, and whether the stored system is in any one of the states is determined. It is characterized in that when any one of the states is determined, it is monitored whether or not a plurality of elements whose designations are stored corresponding to the system state are in a normal state to be stored. A system monitoring method is provided.

[0009] Further, the present invention provides,
A system monitoring device for monitoring a system, comprising: first storage means for storing a plurality of states of the system;
In response to each of the plurality of states of the system stored in the storage means, designation of a plurality of predetermined elements among the elements constituting the system, and when the state of the corresponding system occurs, the designated A second storage unit that stores a normal state to be taken by each of the plurality of predetermined elements; and a state of the system that monitors a state of the system, and any one of the plurality of states stored in the first storage unit. A first monitoring means for monitoring whether or not the state is in a state;
When any one of a plurality of states stored in the storage unit is set, each of the predetermined plurality of elements specified in the second storage unit corresponding to the system state And a second monitoring means for monitoring whether or not the stored normal state is to be taken.

In this system monitoring device,
Each state of the system stored in the first storage means is a combination of predetermined states of a plurality of elements among the elements constituting the system, and the first monitoring means
The state of each element constituting the system is monitored, and it is determined whether the state of each element matches any one of the combinations. Alternatively, it may be determined whether or not any state exists.

In addition, the apparatus further comprises display means, and the second monitoring means determines that the stored normal state does not include any of the predetermined plurality of corresponding elements as a result of the monitoring. In this case, it is preferable to display the name of the abnormal element and the current state of the element.

[0012] At least one of the normal states in the set stored in the second storage means may be a state in which the state quantity of the corresponding element is within a certain range. .

[0013] Further, a correction means for correcting the normal state stored in the second storage means from the history data of the system state may be provided.

Also, a man-machine interface unit including a display unit and an input unit which are the same as or different from the display unit is provided, and the system state stored in the first storage unit and the second state corresponding to the system state are stored. 2 is output to the display means in association with the designation of the plurality of predetermined elements stored in the storage means and the normal state to be taken by each of the plurality of predetermined elements when a corresponding system state occurs. means for, through said input means, on the display means and specified and the normal state of the system state and before Symbol predetermined plurality of elements are output, and the system state stored in the first storage unit Means for designating the plurality of predetermined elements to be stored in the second storage means in accordance with a system state, and for correcting contents of a normal state to be taken by each of the plurality of predetermined elements. Preferably to so that.

[0015] Further, the apparatus further comprises a display means which is the same as or different from the display means, wherein a normal state stored in the second storage means monitored by the second monitoring means and a current state of a corresponding element. It is preferable to output the information to the display means in association with the status.

Further, the second storage means stores a plurality of states of the system stored in the first storage means,
A predetermined time information is stored correspondingly, and the second
The monitoring means is configured to, when the system is in one of a plurality of states stored in the first storage means, correspond to the state determined by the first monitoring means. The monitoring may be started after the lapse of the time indicated by the time information stored in the second storage means.

Further, the monitoring target system may be a plant system.

[0018]

According to the system monitoring method of the present invention, when the system is monitored, the status of the system is monitored, and it is determined whether any of the plurality of stored states of the system is present. , In any case,
By using this as an event, by monitoring whether or not the state of the predetermined plurality of elements storing the designation corresponding to the system state is in a normal state to be taken, whether or not a normal state transition has been performed Can be monitored directly.

Further, according to the system monitoring apparatus of the present invention, the first monitoring means monitors the status of the system, and any one of the plurality of statuses stored in the first storage means. The occurrence of an event is monitored by judging whether or not the event has occurred, and if an event has occurred, the status of each of the predetermined plurality of elements for which a designation has been stored corresponding to the system status as the event is stored. Monitors whether the system is in a normal state to be taken when the state of the system occurs, thereby determining whether a normal state transition has been performed.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a system monitoring apparatus according to the present invention will be described below with a monitoring target system as a plant.

First, FIG. 1 shows the overall configuration of a system monitoring apparatus according to this embodiment.

In the figure, reference numeral 1 denotes a plant to be monitored, and 4 denotes a computer for monitoring and controlling the plant. Reference numeral 7 denotes a central operation room which serves as a man-machine interface of the computer 4, and monitors and controls the entire plant. In addition, the central operation room 7
It includes a main control panel 8 and a monitoring panel. Reference numeral 3 denotes a network connecting the computer 4, the central control room 7, and the plant. The process input / output device 2, the input / output device 5, and the transmission device 6 perform input / output between the plant 1 and the network 3.

In the above configuration, in a system for monitoring a plant, it is necessary to take in each state quantity from the target plant 1 into the computer 4.

Therefore, the process input / output device 2 quantizes the analog quantity of the state quantity from the plant by an analog / digital converter (AD / C) and converts it into a digital quantity. On the other hand, the digital quantity (ON / OF
F) is taken into the process input / output device 2 as a digital quantity.

These digital quantities are processed by the computer 4 via the network 3. Further, as another import path, the plant state quantity may be taken into the process input / output device 3 and the digital quantity converted from the process input / output device 3 may be taken into the computer 4 from the transmission device 6 via the network 3. is there.

The computer 4 performs digit conversion, graphic processing, and the like so that a person can judge and understand various digitized plant state quantities, and sends them to the main control panel 8 of the central operation room 7.

The main control panel 8 obtains necessary plant state information from the various plant state information sent thereto by using an information selection input device such as a keyboard, a touch panel and a mouse.

On the other hand, with regard to the alarm monitoring of the plant, the computer 4 determines whether or not the plant state is in the alarm range. If the plant is in the alarm range, the alarm window 10 in the monitoring panel 9 of the central operating room 7 is used. Is turned on to call attention to the operator, and the name of the alarm process in the alarm area and its state quantity (current value) are displayed on the CRT of the main control panel 8.

Next, a monitoring mechanism configured on the computer 4 is shown in FIG.

As shown, the system monitoring information input device 2
1, a monitoring timing condition that defines the start of monitoring and a monitoring item when the monitoring timing condition is satisfied are displayed on the CRT via a network from the main control panel 8 of the central operating room 7 in a table format shown in FIG. Input is performed using a display device and an input device (man-machine interface unit).

The input system monitoring information (monitoring timing, monitoring item) is supplied to the system monitoring information analysis device 22 to convert the monitoring timing information into the system monitoring timing table 23.
The monitoring item is stored in the monitoring item table 24. Further, each table to be input is a plant operation table 27.
Can be stored in

On the other hand, from the plant 1, each plant state quantity is fetched by the plant input process 28, and the process data table 29 which can be freely referred to inside the computer.
Is stored in

The online monitoring mechanism 25 constantly monitors based on the monitoring timing information stored in the system monitoring timing table 23 and the plant state quantity in the process data table 29, and when a timing condition described later is satisfied. Monitors the monitoring items based on the information in the monitoring item table 24 and the process data table 29.

If an item different from the normal operation state is detected as a monitored item, a message is output to the monitored item output device 26.

The message is sent from the monitoring item output device 26 to the monitoring panel of the central operating room 7 (see FIG. 1) via the network 3 and displayed.

FIG. 3 shows the system monitoring timing table 23, monitoring item table 24, and online monitoring mechanism 25.
And details of the process data table 29 (see FIG. 2).

As shown, the system monitoring timing table 23 includes a PID indicating the address of the plant state quantity stored in the process data table 29, and a determination direction <
>, Set values and timing conditions.
Each row 301, 302, 303 defines one condition.

The online monitoring mechanism (5 in FIG. 2) fetches the value of the corresponding plant state quantity from the process data table 29 based on the PID of the system monitoring timing table 23 and stores it in the current monitoring timing value table 31. I do.

Next, <> of the system monitoring timing table 23, set value conditions and monitoring timing present value table 3
The comparison result with 1 is stored in the judgment value table 33, but <
> If the setting value condition is not specified, the current value is stored as it is in the judgment value table.

The conditions 301, 302, and 303 in the judgment value table 33 and the system monitoring timing table 3 are used.
Is compared only with the condition that matches (=
0), the following correspondingly provided monitoring item table 4
Monitoring. Lines 401, 402, and 403 are monitoring items provided corresponding to the timing conditions 301, 302, and 303, respectively.

As described above, the monitoring items set correspondingly are monitored only when the timing condition is satisfied. Therefore, even if many monitoring items are set, necessary computer processing can be reduced.

When there are a plurality of matching timing conditions (timing establishment items), monitoring of a plurality of monitoring items corresponding thereto is performed.

Monitoring of monitoring items is performed as follows.

First, the PID of the system monitoring item table 24
Process data table 2 using
29 stores the plant state quantity in the monitoring item current value table 32.

Then, the judgment is made according to the set value condition stored in the monitoring item table 29, and the result is stored in the judgment value table 34.

For example, since the current plant state quantity of the PID term A1 is 1231 and the judgment value is> 100 (100 or more), the condition is satisfied, and the result is 1.

Next, each condition judgment value of the monitoring item table 24 is compared with the judgment value table 34, and a mismatch is output as an abnormal item.

In the case of FIG. 3, A5 is a mismatch item.

The timing conditions 301, 302, 3
If a plurality of 03 are satisfied, abnormal monitoring items may be duplicated. After monitoring all monitoring conditions in the monitoring item table, suppress the duplicated items and put them in one and output them. To

In the case of FIG. 3, since the timings of the conditions 1 and 2 are satisfied, A5 in the monitoring item table is detected twice, but A5 is output as one abnormality. Next, as an example, a circulating water pump (CW
The specific operation will be described using the operation monitoring of P) as an example.

In FIG. 4, CWP 43 is provided with a valve 4 for circulating water.
And pressurized and discharged from the valve 45. To operate the CWP 43, power is supplied from the power supply 41 via the power switch 42.

However, in this state, since the heat is generated by the winding resistance r, the resistance loss I2r due to the motor current 41, and the power loss of the eddy current loss, the CWP 43 is heated,
Eventually burns out.

Therefore, a cooling motor 48 is installed,
The cooling water is exhausted by the heat exchanger 46 via the valve 47.

In order to operate the cooling motor 48, the power supply 49 needs to operate.

In order to monitor such an operation state, it is assumed that the following plant state quantities are taken into a computer via a process input / output device.

A1: CWP current A2: CWP inlet flow rate A3: CWP winding temperature A4: CWP outlet flow rate A5: CWP cooling motor running D1: CWP power on D2: CWP inlet valve open D3: CWP outlet valve open D4: Cooling Water inlet valve open The following parameters can be set and processed by the computer.

T1: During CWP test C1: CWP leakage amount (A4-A2) FIG. 5 is a diagram in which the information for monitoring the operation of the plant shown in FIG. 4 is developed in the plant operation table 27 (see FIG. 2). is there.

In the illustrated example, the table number is PMT03 and the table name is circulating water pump operation monitoring. For the monitoring timing set in the system monitoring table 23, the state D1 of the power switch is used for determining the CWP operation, and the condition of T1 during the CWP test is set so that the monitoring is not performed during the CWP test. .

Since these items are digital quantities,
<>, Set value not set. The monitoring timing 5
Items 1 to 10 in the first row of 1 indicate the timing condition numbers, and each timing condition corresponds to the AN of the corresponding vertical item.
It is determined by taking D.

That is, for example, the first condition timing indicates that the CWP power is turned on (during the CWP operation) and that the test is not being performed.

Further, 1 to 1 in the first row of the monitoring item 52
The item of 0 indicates the monitoring item number. For example, the monitoring item No. 1 corresponding to the timing condition 1 has a CWP current of 100 A or more, a CWP winding temperature of 80 ° C. or less,
And the CWP cooling water inlet valve is open and the CWP
Indicates that the cooling motor is running.

In this example, in the timing condition 2, the time delay from the establishment of the timing condition to the start of monitoring of the monitoring item is defined as 60 seconds. This is the valve D
2. When it takes time to open and close D3, unnecessary warning is suppressed. This delay time is set to the delay 41 in the table.

In the present embodiment, as described above, it is possible to input and define from the CRT screen in the form of the table shown in FIG. Also, the plant operation table 2
The table stored in 7 is displayed on the CRT on the main control panel 8 according to the instruction of the main control panel 8 of the central control room 7 as necessary. Further, correction is made on the display screen. In this case, it is possible to directly move the cursor for input so that the correction item can be promptly moved, and also possible to move the cursor by touch.

In accordance with an instruction from the main control panel 8 (see FIG. 1) of the central control room 7, this table and the current plant status in the process data table 29 (see FIG. 2) are appropriately selected. The values of the quantities are associated with each other and displayed on the main control panel 8.

As described above, in the table shown in FIG.
The monitoring timing 51 is expanded to the system monitoring table 23, and the monitoring item 52 is expanded to the monitoring item table 24 to perform actual monitoring. Here, the flow of this monitoring processing is shown in FIG. 6 taking as an example a case where the power source 9 of the cooling motor has failed / recovered during the CWP operation.

If the power supply of the cooling motor fails within 60 seconds after the CWP is activated (step 61), the timing condition 1 and the timing condition 2 (CWP power-on and CWP test is not performed) in the plant monitoring table are satisfied. However, at this stage, only the monitoring item 1 is monitored because a delay of 60 seconds of the start condition of the monitoring item corresponding to the timing condition 2 has not elapsed. Since the power supply for the CWP cooling motor has failed, A5 becomes 0 during the operation of the CWP cooling motor.
A, and a message is output (step 62).
Next, when the CWP operation is continued as it is (Step 6)
3) Eventually, the temperature of CWP increases.

Also, since 60 seconds have elapsed since the CWP was activated,
The monitoring items 1 and 2 are monitored, and the abnormal items are A5 during the operation of the CWP cooling motor and the CWP winding temperature of 780 ° C., but are reduced to one and a message is output (step 6).
4).

Next, when the power supply of the cooling motor is restored (step 65), the message of A5 is deleted during the operation of the CWP cooling motor (step 66). (Step 6
7).

As described above, since the system monitoring apparatus according to the present embodiment is configured, the following effects can be obtained.

1. Since monitoring timing conditions and monitoring items can be easily defined from a CRT display screen as a table, an operator having know-how on the plant can directly construct the monitoring timing conditions and monitoring items.

2. When monitoring, only the monitoring items for which the timing conditions are satisfied are monitored, so that the computer load is small.

3. Unlike the alarm detection based on the limit value, the detection accuracy is high because the abnormal point is detected from the related information.
Further, it is possible to detect abnormalities in digital values such as opening and closing of a valve and ON / OFF of a power supply.

4. For a single monitoring item, related abnormal items are collectively output as a message, so that quick response is possible.

[0074]

As described above, according to the present invention, it is possible to provide a system monitoring apparatus capable of directly determining the normality of the state transition of a system such as a plant.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a system monitoring device according to one embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a monitoring mechanism in the system monitoring device.

FIG. 3 is an explanatory diagram showing the concept of each table and processing used in the monitoring mechanism.

FIG. 4 is a block diagram illustrating an example of a monitoring target plant.

FIG. 5 is an explanatory diagram showing a table for inputting and displaying monitoring timing information and monitoring item information.

FIG. 6 is an explanatory diagram showing a flow of monitoring and alarm processing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plant 2 Process input / output device 3 Network 4 Computer 5 Input / output device 6 Transmission device 7 Central operation room 8 Main control panel 9 Monitoring panel 23 System monitoring timing table 24 Monitoring item table 29 Process data table Table 31 Monitoring timing present value table 32 Monitoring item present value table

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyoshi Hanabuchi 1-3-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company (72) Inventor Ikuo Ogoshi 1-3-3 Uchisaiwaicho, Chiyoda-ku, Tokyo TEPCO (72) Inventor Tomio Onuma 1-3-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company (56) References JP-A-61-221998 (JP, A) JP-A-3-259716 (JP) , A) (58) Fields studied (Int. Cl. ⁷ , DB name) G01D 21/00 G05B 23/02 302

Claims (10)

(57) [Claims] 1. A system monitoring method for monitoring a system, comprising: storing a plurality of states of the system in advance; and respectively corresponding to the plurality of states of the stored system.
Designating a plurality of predetermined elements among the elements constituting the system, and storing a normal state to be taken by the specified plurality of specified elements when a state of the corresponding system occurs. Sometimes, the status of the system is monitored, and whether the stored system is in any one of a plurality of statuses is monitored. A system monitoring method for monitoring whether or not a plurality of elements whose designations are stored are in the stored normal state to be taken. 2. A system monitoring device for monitoring a system, comprising: first storage means for storing a plurality of states of the system; and a plurality of states of the system stored in the first storage means. And storing a plurality of specified elements among the elements constituting the system and a normal state to be taken by each of the specified plurality of specified elements when a corresponding system state occurs. A second storage unit, and a first monitoring unit that monitors a state of the system and determines whether any of the plurality of states stored in the first storage unit is present. And when the system is in one of a plurality of states stored in the first storage means, the system is designated in the second storage means in accordance with the system state. Predetermined duplication A second monitoring means for monitoring whether each of the number elements is in a stored normal state to be taken. 3. The system monitoring apparatus according to claim 2, wherein each state of the system stored in said first storage means is a predetermined state of one or more of the elements constituting the system. A combination of states, wherein the first monitoring unit monitors the state of each element constituting the system, and determines whether the state of each element matches any of the combinations by determining A system monitoring device for determining whether any of a plurality of states stored in a first storage means is present. 4. The system monitoring apparatus according to claim 2, further comprising display means, wherein the second monitoring means responds to the stored normal state to be taken as a result of the monitoring. A system monitoring apparatus, wherein when it is determined that any of the plurality of predetermined elements does not exist, a name of an element that is not in a normal state and a current state of the element are displayed. 5. The system monitoring device according to claim 2, wherein at least one of the normal states stored in said second storage means has a constant state quantity of a corresponding element. A system monitoring device, wherein the system monitoring device is in a state of being within a range. 6. The system monitoring apparatus according to claim 2, further comprising a correction unit configured to correct a normal state stored in the second storage unit from system state history data. Characteristic system monitoring device. 7. The system monitoring apparatus according to claim 2, further comprising a man-machine interface unit including a display unit and an input unit, wherein the system is stored in the first storage unit. A state, a designation of the plurality of predetermined elements stored in the second storage means corresponding to a system state, and a normal to be taken by each of the plurality of predetermined elements when a corresponding system state occurs and a state, and means for outputting to said display means in association, through said input means, on the display means and specified and the normal state of the system state and before Symbol predetermined plurality of elements is outputted, the A system state to be stored in the first storage means, a designation of the plurality of predetermined elements to be stored in the second storage means corresponding to the system state, and a normal state to be taken by each of the plurality of predetermined elements Within A system monitoring device comprising means for correcting the contents. 8. The system monitoring apparatus according to claim 2, further comprising a display means, wherein said system monitoring apparatus is stored in said second storage means monitored by said second monitoring means. A system monitoring apparatus, wherein a normal state is associated with a current state of an element corresponding to the normal state and output to the display means. 9. The system monitoring device according to claim 2,3, 4,5, 6,7 or 8, wherein said second storage means includes a plurality of systems of the system which are stored in said first storage means. For each of the states, a predetermined time information is stored, and the second monitoring unit is configured such that the system includes a plurality of states stored in the first storage unit.
In any case, the monitoring is started after a lapse of time indicated by the time information stored in the second storage means in accordance with the state determined by the first monitoring means. A system monitoring device characterized by the above-mentioned. 10. The system according to claim 2, wherein said monitored system is a plant system.
10. The system monitoring device according to 7, 8, or 9.