JPH1069498A - Plant data collection and recording device - Google Patents

Abstract

(57) [Summary] [Problem] To efficiently record plant data as history data. SOLUTION: A process input processing means 3 for inputting plant data transmitted from a plant P, a current data storage means 5 for temporarily storing and processing the plant data, and a data collection temporary storage for storing the plant data in a sectional format in time unit. The storage file 7, a time-series data storage unit 9 that edits the data of the cross-sectional format in the data collection temporary storage file 7 into data of the time-series recording format, and stores the data, and several types of data edited by the time-series data storage unit 9. A time-series data storage file 11 for storing the time-series data of the recording cycle, an external storage device recording unit 13 for storing the time-series data in the time-series data storage file 11 in the external storage device EM, and an input / output device IO. The time-series data storage file 11 and the external storage device EM And a data search means 15 for searching the data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant data collecting and recording apparatus which efficiently records a large amount of plant data transmitted from a unit computer of a plant and can store the data for a long period of time.

[0002]

2. Description of the Related Art For example, in a power generation plant, a file is created by a plant data collection and recording device for each transmission cycle from a unit computer, and plant data for each instantaneous value is recorded and managed in the file.

[0003] Further, all plant data transmitted from the unit computer is not recorded by the plant data collection and recording device, but in order to reduce the data size to be recorded, certain types of plant data are included in the plant data. Recording was done only for. Such specific types of data include, for example, water treatment, wastewater treatment environment-related data, start / stop actual data, heat stress-related data at start / stop, turbine vibration, rotation speed, temperature data, Water quality data, auxiliary equipment monitoring data, and boiler fluid temperature data.

[0004] The plant data collection timing is as follows.
For turbine vibration and rotation speed, from ventilation to 3000 RPM, and for auxiliary equipment monitoring data, 15, 30, 5
0, 75 and 100% load 30 minutes after settling.

[0005]

The conventional plant data collecting and recording apparatus has the following problems. (1) In order to reduce the recording size of a large amount of plant data transmitted from the unit computer, if data is recorded only at a specific point, other points will not be recorded at all. When examining the secular change of the plant or the deterioration state of the plant using the recorded data of the above, detailed investigation cannot be performed.

(2) In a case where a specific point is searched in a time series such as from a certain point in the past to the present, if data is managed in a cross-section as in the related art, a recorded file is frequently referred to. Results in a reduced search speed.

(3) Since the collection cycle of the plant data is fixed, data having little change in value, such as contact system data and analog system constant data, has almost the same value when recorded in a one-minute period. Is recorded, resulting in a decrease in recording efficiency.

[0008] (4) Regarding the collection timing, a period of 30 seconds from stop of the plant to disconnection, from ignition to completion of start,
It is difficult to change the collection timing according to each event, such as 5 minutes from the start to ignition, 5 minutes from the start to ignition, and 1 hour from the start, so that detailed recording is not possible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made in consideration of the above circumstances, and provides a plant data collection system capable of efficiently recording plant data sent from a unit computer of a plant in accordance with the characteristics thereof so as to be capable of long-term storage. It is intended to provide a recording device.

[0010]

In order to achieve the above object, the present invention provides a plant data collecting and recording apparatus for collecting plant data indicating an operation state of a plant and recording the collected data as operation history data. A process input means for collecting plant data from the plant at a fixed cycle, and a current data storage means for storing plant data collected at a fixed cycle by the process input means in a data collection temporary storage file in a sectional format for each collection time. A time-series data storage unit that extracts plant data in a sectional format from a data collection temporary storage file, edits the data into time-series data with a plurality of types of recording periods for each data item, and saves each in a time-series data storage file; Time system of a predetermined recording cycle stored in a data storage file for a certain period An external storage device recording means for recording data in an external storage device, and a data search means for retrieving operation history data specified from a time-series data storage file or an external storage device based on a request from an operator. And

In the above configuration, the format for storing the history data of the plant is time-series from the cross-section based on the time, so that the time-series and data retrieval speed generally used for data analysis of a specific item is improved. I do. In addition, when converting plant data from cross-section to time series, high-speed data files, medium-speed data files, and low-speed data files can be classified and created by changing the recording cycle, so that historical data suitable for the application can be managed. In addition to this, it is possible to improve the retrieval speed of the history data and reduce the capacity of the magnetic disk to be stored.

According to a second aspect of the present invention, there is provided a plant data collecting and recording apparatus for collecting plant data indicating an operation state of a plant and recording the data as operation history data. A database, a maximum / minimum compressed value creating means for compressing the plant data of the predetermined period based on the maximum value and the minimum value of the plant data of the predetermined period in the plant database so as to fall within a predetermined reduced numerical range; A maximum / minimum compression database for storing data compressed by the maximum / minimum compression value creating means.

In the above configuration, for example, the maximum value and the minimum value are calculated from the plant database for one day, and the difference between the data before compression and the minimum value is divided by the difference between the maximum value and the minimum value. By multiplying the data by the maximum integer value that can be represented in the compression storage area, the data can be compressed to a specified bit width.

According to a third aspect of the present invention, there is provided a plant data collection and recording apparatus for collecting plant data indicating an operation state of a plant and recording the data as operation history data, wherein a process input means for inputting plant data from the plant at a constant cycle; A plant event judgment table for storing judgment conditions of a plant event, and an event state of the plant are judged based on the plant data from the process input means and the judgment conditions of the plant event in the plant event judgment table, and a recording cycle of the plant data is determined. It is characterized by comprising recording condition determining means for determining, and data recording means for recording plant data input by the process input means in the operation history database at the recording cycle determined by the recording condition determining means.

In the above configuration, data can be recorded at a recording cycle corresponding to a plant event.
Then, it becomes possible to record only the data necessary for the analysis of the plant, and it is possible to improve the efficiency of data recording.

According to a fourth aspect of the present invention, there is provided a plant data collecting and recording apparatus for collecting plant data indicating an operation state of a plant and recording the data as operation history data. The database and the plant data are extracted from the plant database in the order of collection, the first collected plant data and the second collected plant data are stored in the operation history database, and the third and subsequent collected plant data are already stored in the operation history database. When the value of the latest and next newest plant data among the stored plant data is substantially equal to the value extrapolated at the collection time, the collected plant data is overwritten with the latest plant data in the operation history database. Data thinning means and Characterized by comprising.

In the above configuration, for each plant data, if the current value is substantially equal to the value on the linear function obtained from the last saved value and the last saved value in the operation history database, data is recorded. Omitted. Since non-recorded plant data can be linearly interpolated from two data values before and after the data, efficient recording can be performed, and large-scale plant data can be stored for a long period of time.

According to a fifth aspect of the present invention, in the plant data collection and recording apparatus having the above-mentioned configuration, the data for calculating the allowable range of the data thinning based on the difference between the maximum value and the minimum value of the plant data for a predetermined period in the plant database. Comprising a thinning allowable range calculating means, wherein the data thinning means comprises:
For the collected plant data after the third time, the difference between the latest and the next newest plant data among the plant data already stored in the operation history database and the value extrapolated at the collection time is the data thinning allowable range. When the data is within the allowable range of the data thinning calculated by the calculating means, the collected plant data is overwritten on the latest plant data in the operation history database, and when the difference from the extrapolated value deviates from the allowable range of the data thinning, the operation history is obtained. It is stored in a database.

In the above configuration, a data thinning allowable range for thinning out data is calculated in accordance with the maximum change width of each plant data in a predetermined period, and the present value is calculated based on a linear function obtained from the previous saved value and the last two saved values. And if the difference is within the allowable range of data thinning, data recording is omitted.

According to a sixth aspect of the present invention, in the plant data collecting and recording apparatus having the above-mentioned structure, a data thinning rate storage database for storing a data thinning rate previously determined for each input point of plant data is provided, and the data thinning rate is allowed. The range calculation means multiplies the difference between the maximum value and the minimum value of each input point of the plant data for a predetermined period in the plant database by the data decimation rate of the corresponding input point in the data decimation rate storage database, and the plant of each input point. The data thinning allowable range is calculated for each data.

In the above configuration, a data thinning rate adapted to each plant data is set, and an allowable data thinning range is determined for each plant data from the maximum change width in a predetermined period and the data thinning rate corresponding thereto. Recording becomes possible.

According to a seventh aspect of the present invention, there is provided a plant data collection and recording device for collecting plant data indicating an operation state of a plant and recording the data as operation history data, wherein a process input means for inputting plant data from the plant at a constant cycle; The data recording means for recording the plant data input by the process input means in the operation history database, and the plant data received this time by the process input means are used for the latest and next newest plant recorded in the operation history database. A plant data thinning means for deleting the latest plant data from the operation history database when the value is substantially equal to the value extrapolated at the current reception time from the data is provided.

According to an eighth aspect of the present invention, in the plant data collecting and recording apparatus having the above-mentioned configuration, the thinning allowable range determination rate storing database for storing the thinning allowable range determining rate for storing the plant data at each input point and the operation history database. Estimated value calculating means for calculating an estimated value of plant data expected to be transmitted next from the plant based on the latest and next newest plant data; and the latest and next The thinning allowable range is calculated based on the new plant data and the thinning allowable range determination rate of the corresponding input point in the thinning allowable range determination rate storage database, and the estimated value calculated by the estimated value calculating means and the corresponding current time are calculated. When the difference from the received value is within the allowable range for thinning, the latest plant data Characterized in that a thinning determination unit for requesting the plant data thinning means to remove.

In the above configuration, an estimated value to be transmitted next is calculated from past plant data transmitted from each unit computer of the plant. When it is determined that the estimated value is substantially equal to the actually transmitted value, the latest plant data in the past is deleted from the operation history database, and the plant data transmitted this time is used as is in the operation history database. Recording. When it is not determined that the estimated value and the actual value are substantially equal, the plant data transmitted this time is recorded without deleting the past plant data. The plant data that is not recorded can be linearly interpolated from the stored data values before and after the plant data, so that efficient recording can be performed.

According to a ninth aspect of the present invention, there is provided a plant data collection and recording apparatus for collecting plant data indicating an operation state of a plant and recording the data as operation history data, wherein a process input means for inputting plant data from the plant at regular intervals; Contact database that stores the contact data of the plant data, and extracts the contact data from the plant data input by the process input means, and compares it with the latest contact data stored in the contact database and only when it changes Contact data collection and recording means for recording the contact data collected this time in a contact database. In the above configuration, the contact data collection and recording unit reads the plant data transmitted from the unit computer of the plant at a constant period and collected by the process input unit, and extracts the value of the contact data point. Further, the data value previously registered in the contact database is compared with the data value transmitted this time, and if the values are different, the transmission time and the value are registered in the contact database.
Further, the values are compared, and if they are the same, the registration in the contact database is not performed, and the next reception data is waited.

[0026]

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

FIG. 1 shows a first embodiment of a plant data collecting and recording apparatus according to the present invention. A plant data collecting and recording apparatus 1 shown in FIG. A process input processing means 3 for inputting, a current data storage means 5 for temporarily storing plant data, a data collection temporary storage file 7 for storing plant data in a sectional format in time units, and a data collection temporary storage file 7 in the data collection temporary storage file 7. A time-series data storage unit 9 for editing and storing the data in the section format into data in the time-series recording format, a time-series data storage file 11 for storing the time-series data edited by the time-series data storage unit 9, External storage for recording the time series data in the series data storage file 11 in the external storage device EM And location recording means 13, input-output device IO
Time-series data storage file 1 by a search request via
1 and a data search means 15 for searching data in the external storage device EM.

As shown in FIG. 2, the data collection temporary storage file 7 stores n items of plant data S1 periodically collected by the process input processing means 3, for example, for one day, in the order of the collection time in the data of the section recording format. Store in format.

As shown in FIG. 3, the time-series data storage file 11 stores, for each data item, data of a predetermined recording cycle / period, for example, high-speed data of one minute cycle / one month, and ten minutes cycle / three months of data. Medium-speed data, low-speed data for one hour period / one year are stored in a time-series recording format, and the data type and recording period / period necessary for data search are stored.

Next, the operation of this embodiment will be described with reference to FIGS.
It will be described based on. The plant data from the plant P is read at regular intervals by the process input processing means 3 and stored in the data collection temporary storage file 7 by the current data storage means 5.

The time-series data storage means 9 extracts the plant data stored in a sectional format when viewed on a time basis from the data collection temporary storage file 7 and converts it into a time-series recording format. Save to 11. At this time, time-series data in the time-series recording format is created at the same cycle as the collection cycle of the section recording format, for example, one minute, and stored in the time-series data storage file 11 as the high-speed data file 11a. Further, the medium-speed data file 11b having a slightly longer data cycle depending on the intended use, for example, a 10-minute recording cycle
Alternatively, for example, a low-speed data file 11c having a one-hour recording cycle is created.

FIG. 4 shows the flow of processing of the time-series data storage means 9. First, n-item current plant data stored in a sectional format is extracted from the data collection temporary storage file 7 (step 100). Is set in the buffer corresponding to each item (step 10).
1). Next, it is determined whether or not all the data has been set in each buffer (step 102). If the buffer is full, the data is stored in the high-speed data file 11a in a time-series format (step 103). Further, it is determined whether or not the current collection time of the plant data is the storage timing of the medium-speed data file 11b (step 104), and if so, the same data is stored in the medium-speed data file 11b in a time-series format. (Step 10
5). At the same time, it is determined whether it is time to save the low-speed data file 11c (step 106), and if so, the data is saved in the low-speed data file 11c in a time-series format (step 10).
7). At the same time as storing the data in the data file 11, the buffer is cleared and the input buffer is switched (step 108).

The relationship between the data recording periods of the high-speed data file 11a, the medium-speed data file 11b, and the low-speed data file 11c is as follows. It is like.

In the time-series data storage file 11, high-speed data, medium-speed data, and low-speed data created by the time-series data storage means 9 are spooled for a certain period. The amount of spool storage is determined by the capacity of the magnetic disk and the purpose of data retrieval. In particular, low-speed data has a smaller data amount than high-speed data, so long-term data can be stored on the magnetic disk. For example, spool data is stored for one month for high-speed data, three months for medium-speed data, and one year for low-speed data.

The external storage device recording means 13 records the specified data spooled in the time-series data storage file 11 in the external storage device EM during a specified period or when the specified number of data is spooled.

In the data search means 15, the input / output device IO
For a plant data search request instructed on data items, sampling cycles, and periods, first, it is determined whether or not target data exists on the magnetic disk of the time-series data storage file 11, and if it exists, a magnetic disk with a high access speed is determined. The data is extracted from an external storage device EM such as an optical disk having a relatively low access speed if it does not exist.

As is clear from the above description, according to the present embodiment, the plant data is changed from the sectional format to the time-sequential format, so that frequent data retrieval when long-term data is retrieved is reduced. The speed can be increased.

In the time series format, the spool period is determined for each type of high speed data / medium speed data / low speed data for each type, and the spool period is determined for each purpose. And the search speed can be increased. Furthermore, there is no need to spool high-speed data on a magnetic disk for a long period of time for the purpose of speeding up long-term data retrieval, and the amount of magnetic disk used can be reduced.

FIG. 5 shows a second embodiment of the plant data collecting and recording apparatus according to the present invention. A plant database 21 for storing plant data collected from a plant at a constant period for a predetermined period, and a plant database 2
A maximum / minimum value calculating unit 23 for obtaining a maximum value and a minimum value from the data stored in No. 1; a maximum / minimum compressed value creating unit 25 for compressing data based on the maximum / minimum value of the data; It comprises a maximum / minimum compressed data base 27 for storing data, and a maximum / minimum compressed data storage means 29 for storing the data compressed by the maximum / minimum compressed value creating means 25 in the maximum / minimum compressed data base 27.

The plant database 21 stores plant data of each input point for a predetermined period (for example, one day) transmitted from the unit computer of the plant together with header information. The plant database 21 shown in FIG. 6 stores plant data t1 to tn of n input points.

The maximum / minimum value calculating means 23 extracts the maximum value and the minimum value from the n pieces of pre-compression data in the plant database 21.

The maximum / minimum compressed value creating means 25 calculates the compressed value of each data based on the maximum and minimum values obtained by the maximum / minimum value calculating means 23.

As shown in FIG. 7, the maximum / minimum compression database 27 stores the maximum value and the minimum value together with the header information, and stores compressed n data.

Next, the operation of the present embodiment will be described with reference to FIGS. When there is a request for compression processing, the maximum / minimum value calculating means 23 reads n pieces of plant data t1 to tn from the plant database 21 for each input point (step 200), and sets the maximum value among the n pieces of data. The value MAX and the minimum value MIN are extracted (step 20).
1).

Here, if MAX is an invalid value (for example, a very large value such as 999999), if the plant data is compressed based on the invalid value according to a data compression calculation formula described later, the compressed data is always When the compressed data is decompressed, all the decompressed data becomes the minimum value.

In order to avoid this, it is checked whether or not MAX is appropriate by the following equation (step 20).
2).

(T-MIN) / (MAX-MIN) <1/2 ^b where t is MIN, among plant data t1 to tn.
An arbitrary data value excluding MAX, b is a compressed data size (bit) per data.

If this condition is met, M
It is determined that AX is invalid, and a correction process for setting MAX to 0 is performed (step 203), and the maximum value and the minimum value are calculated again (step 200).

Next, using the determined MAX and MIN,
The maximum / minimum compressed value creating means 25 calculates the compressed data ti '(step 204). That is, the data value ti
MAX and M of the difference between (i = 1, 2,..., N) and MIN
The product of the ratio to the difference in IN and the maximum integer value that can be handled within the compressed data size (b bits) is the compressed data t
i ′ and have a positive integer value.

Here, since ti-MIN≤MAX-MIN, the compressed data ti 'always falls within the compressed data size. This can be expressed by the following equation.

[0050]

[Number 2] ti '= (ti -MIN) / (MAX-MIN) * 2 b , however, ti is any pre-compression plant data, data size a bit, b is compressed data size (bits), b <a. Further, 2 ^b is the largest integer value that can be handled on the data size b bits, (ti -MI
N) / (MAX-MIN) <1, so that ti '≦ 2
becomes ^b .

The compressed data ti 'is obtained in accordance with the above-mentioned data compression calculation formula [Equation 2].
′ Is a decompression formula derived from the above data compression calculation formula if necessary

## EQU3 ## By using ti = ti '* (MAX-MIN) / ^2b + MIN, the data can be decompressed to ti of the data size before compression.

The maximum value MAX and the minimum value MIN calculated by the maximum value / minimum value calculating means 23 and the compressed data ti '(i = 1, 1) generated by the maximum / minimum compressed value generating means 25
2,..., N) are stored in the maximum / minimum compressed database 27 by the maximum / minimum compressed data storage means 29 (step 205).

As is apparent from the above description, according to the present embodiment, the ratio of the difference between the data value and the minimum value to the difference between the maximum value and the minimum value for plant data at a certain input point during a predetermined period. By using the product of the maximum integer value that can be handled within the compressed data size as the compressed data, the plant data within a predetermined period can always be held within the compressed data size, and the capacity required for recording is reduced. Can be.

FIG. 9 shows a third embodiment of the plant data collecting and recording apparatus according to the present invention, in which a process input processing means 3 for inputting plant data transmitted from a unit computer of a plant P, A plant event judgment table 31 for storing the judgment conditions of the above, a recording condition judgment means 33 for judging an event state of a plant which becomes a recording condition based on the plant event judgment table 31 for the plant data inputted by the process input processing means 3, A data recording unit 35 for recording the plant data input by the process input processing unit 3 under the recording conditions determined by the recording condition determining unit 33; and a power generation operation history for storing plant data having different recording periods according to the event state of the plant. Database 37 and input / output device I
O.

The plant event judgment table 31 includes:
Conditional expressions for determining the event state (load stabilization, disconnection, ignition, etc.) of the plant as shown in FIG. 10 are stored, and these conditional expressions are registered and changed via the input / output device IO.

The recording condition determination means 33 determines from the plant data input by the process input processing means 3 what kind of event the plant is in based on the plant event determination table 31, The recording cycle of the plant data is determined from the correspondence table between the data and the recording cycle.

The data recording means 35 stores the plant data input to the process input processing means 3 in the power generation operation history database 37 at the recording cycle determined by the recording condition determining means 33.

Next, the operation of the present embodiment will be described with reference to FIGS.
This will be described with reference to FIG.

First, the plant data transmitted from the unit computer of the plant P is input to the process input processing means 3.
(Step 300). Next, the recording condition determining means 33 determines the event state of the plant which is the recording condition of the plant data input from the plant P based on the contents of the plant event determination table 31 registered by the input / output device IO ( Step 301).

If the result of this determination is that the event state of the plant is between the start of shutdown and the disconnection or between the start of ignition and the completion of startup (step 302), the recording cycle of the plant data is set to 30 seconds, and the process input processing means 3. The plant data input at regular intervals into 3
It is recorded in the power generation operation history database 37 at a cycle of 30 seconds (step 303).

If the event state of the plant is between the disconnection and the completion of the stop, or between the start of the start and the ignition (step 304), the recording cycle of the plant data is set to 5 minutes and the process input processing means 3 The plant data is recorded in the power generation operation history database 37 by the data recording means 35 every five minutes (step 305).

If the event state of the plant is in a stable load state (step 306), the recording period of the plant data is set to one hour, and the plant data from the process input processing means 3 is collected by the data recording means 35 in one-hour intervals. Recorded in the power generation operation history database 37 (step 30)
7).

When the plant state is not any of the above-mentioned event states, the recording period of the plant data is set to one minute, and the plant data from the process input processing means 3 is generated by the data recording means 35 at the one-minute period. It is recorded in the history database 37 (step 308).

As is clear from the above description, according to the present embodiment, the recording cycle can be changed depending on the various event states of the plant, so that the plant data transmitted at a constant cycle is recorded as it is. Compared to the case where unnecessary data is not recorded, the recording efficiency is considerably improved because unnecessary data is not recorded, and recording can be performed at a period much shorter than the normal recording period when starting and stopping the plant. Therefore, more accurate plant analysis can be performed.

FIG. 12 shows a fourth embodiment of the plant data collecting and recording apparatus according to the present invention. The plant database 21 stores, for example, one day's worth of plant data collected from a plant at a constant period for a predetermined period. A maximum / minimum value calculating means 41 for calculating the maximum value and the minimum value of the daily data; a maximum / minimum value storage database 43 for storing the maximum and minimum values of the daily data; A data thinning rate storage database 45 for storing the rate,
A data-thinning-permissible-range calculating unit 47 that obtains a data-thinning allowable range using the data-thinning-out ratio in the data-thinning-rate storage database 45, and thins out one-day data in the plant database 21 based on the calculated data-thinning-out allowable range. And a power generation operation history database 51 for storing the data extracted and thinned out by the data thinning means 49. After the data thinning means 49 stores the data in the power generation operation history database 51, the plant database 21 Database deleting means 53 for deleting the data for one day which has become the processing target in the database
Consists of

The plant database 21 stores analog data transmitted from the unit computer of the plant.

When one day's data is stored in the plant database 21, the maximum value / minimum value calculating means 41 extracts the maximum value and the minimum value of each input point from the data and stores the maximum value / minimum value. It is stored in the database 43.

The data thinning rate storage database 45 stores data thinning rates previously determined for each input point.

The data-thinning-permissible-range calculating means 47 is set in the maximum / minimum values of each input point stored in the maximum / minimum value storage database 43 and the data-thinning rate storage database 45. The data thinning allowable range of each input point is calculated from the data thinning rate of the corresponding input point. For example, the allowable range of data thinning RANGE is calculated from the difference between the maximum value MAX and the minimum value MIN of the day and the data thinning rate t (%) of the input point corresponding to the following formula.

## EQU4 ## RANGE = (MAX-MIN) /2.0*t/100

The data thinning means 49 reads the first and second data from the plant database 21 in the order of the time of the plant data for one day, and stores them in the power generation operation history database 51 together with the relative times 0 and 1.

Next, the third data is read, and the difference Δx (current difference) from the second (relative time = 1) data value stored in the power generation operation history database 51 and the second data value and the first ( The difference Δx from the data value of (relative time = 0). (Previous difference) is calculated, and the present difference Δx is the previous difference Δx.
Is smaller than the value obtained by adding the data thinning allowable range RANGE to the data, and the current difference Δx is the previous difference Δx. When the data is larger than the value obtained by subtracting the data thinning allowable range RANGE from the data, the third data is determined to be within the data thinning allowable range, and the data is replaced with the second data in the power generation operation history database 51. With relative time = 2. The current difference Δx is the previous difference Δx. Is larger than the sum of the data and the allowable range RANGE
x. If the value is smaller than the subtraction value of the data thinning allowable range RANGE, it is determined that the third data has deviated from the data thinning allowable range, and the second data is stored in the power generation operation history database 51 without erasing.

Next, for the fourth data, when the third data is stored in the power generation operation history database 51 without overwriting, the difference between the fourth data value and the third data value is calculated this time. The difference Δx, the difference between the third data and the second data is the previous difference Δx. It is determined whether the fourth data is to be added and stored in the power generation operation history database 51 as it is or overwritten with the third data by the same determination as described above.

When the third data is overwritten on the second data in the power generation operation history database 51, the difference between the fourth data value and the third data value is represented by the current difference Δx and the third data value. The difference between the data value and the first data value is the previous difference Δx. The current difference Δx is the previous difference Δx. 1/2 of
Is greater than the value obtained by adding the allowable range RANGE to the data, or the previous difference Δx. Data thinning tolerance RA from 1/2 of
If the value is smaller than the value obtained by subtracting NGE, the fourth data is stored in the power generation operation history database 51.

For the i-th data, the difference between the value of the data stored in the power generation operation history database 51 and the latest data is represented by the current difference Δx, and the value of the value between the latest data and the next new data is calculated. The difference is the previous difference Δx. Assuming that the relative time of the latest data is T0 and the relative time of the next new data is T1, the difference Δx this time is as follows.

## EQU5 ## Δx. / (T0−T1) −RANGE <Δx <Δx.
When it is in the range of / (T0-T1) + RANGE, the i-th data is set to the latest data in the power generation operation history database 51 and the relative time is set to (i-1).
And the next (i + 1) -th data is extracted from the plant database 21.

The database deleting means 53 deletes one day's plant data in the plant database 21 after the data thinning processing by the data thinning means 49 is completed.

Next, the operation of the present embodiment will be described with reference to FIGS. The plant data collection and recording device 1 receives plant data transmitted from a unit computer of the plant by means (not shown) and stores it in the plant database 21. At this time, it is determined whether or not the plant data stored in the plant database 21 is on a daily basis (step 400). The smallest value is calculated by the maximum / minimum value calculating means 41 and stored in the maximum / minimum value storage database 43 (step 401).

Next, the data thinning allowable range calculating means 4
7 extracts the maximum value and the minimum value of the plant data for one day from the maximum value / minimum value storage database 43, calculates the difference between them (step 402), and performs the data thinning set in the data thinning rate storage database 45. The data thinning allowable range is calculated using the rate data (step 40).
3).

The data thinning means 49 fetches data from the plant database 21 (step 404), and determines whether or not there are two or more plant data items per day in the power generation operation history database 51 (step 4).
05) When there are not two or more, or even if there are two or more recorded data, it is determined whether or not the difference between the extracted data and the value extrapolated from the latest and the next newly recorded data is within the allowable range of data thinning. When it is determined (step 406) that the data deviates from the allowable range of data thinning, the data is stored in the power generation operation history database 51 (step 40).
7). If the stored data is not the last data of the day, the next data is taken out from the plant database 21 (step 404). Is deleted (step 408), and an end process is performed.

On the other hand, if the difference between the data extracted in step 406 and the value extrapolated from the latest and next newest recorded data is within the allowable range of data thinning, the extracted data is stored in the power generation operation history database 51. The latest data is overwritten (step 409), and if not the last data of the day, the next data is stored in the plant database 2
1 (step 404).

As is clear from the above description, according to the present embodiment, for example, a large amount of plant data transmitted from the control unit computer in a one-minute cycle is used to calculate the difference between the maximum value and the minimum value in one day. By performing thinning based on the data thinning allowable range obtained by using the data thinning rate, the data recording size can be minimized, and data can be recorded for a long period of time.

As for the thinned data, two data before and after the thinning are obtained, an l-order expression is calculated from the data at the two points, and linear interpolation can be performed from the linear expression. .

In the present embodiment, the thinning process is performed for each day of data. However, the present invention is not limited to this. An arbitrary period is set, and the data is thinned for each period. Is also good.

FIG. 14 shows a fifth embodiment of the plant data collecting / recording apparatus according to the present invention, in which a process input processing means 3 for inputting plant data transmitted from a unit computer of a plant, and a process data processing device 3 for inputting plant data. The power generation operation history database 61 to be stored, the estimated value calculation means 63 for calculating the estimated value of the next plant data using the plant data in the power generation operation history database 61, and the estimated value to store the calculated plant data estimated value A storage database 65, a thinning allowable range determination rate storage database 67 for storing a thinning allowable range determination rate, and a difference between a plant data estimated value in the estimated value storage database 65 and an input value input by the process input processing means 3 and thinning. Based on the thinning allowable range determination rate in the allowable range determination rate storage database 67 Thinning-out determining means 69 for determining data thinning-out; plant data thinning-out means 71 for thinning out plant data in the power generation operation history database 61 based on the determination result of the thinning-out determining means 69; And data recording means 73 for recording the plant data obtained in the power generation operation history database 61.

In the power generation operation history database 61, the plant data input by the process input processing means 3 is recorded by the data recording means 73. When the plant data is recorded, if the difference between the plant data and the estimated value calculated based on the past plant data stored in the power generation operation history database 61 is within the allowable range for thinning, the power generation operation history database The latest data from the past plant data stored in 61 is deleted by the plant data thinning means 71.

When the plant data is stored in the power generation operation history database 61 and two or more data points are recorded for one input point, the estimated value calculating means 63 estimates the plant data which is considered to be transmitted next. Calculate the value.

For example, when the relative time T of the data transmission time is t1, t2, t3,... And the value of the plant data Y corresponding to the time is y1, y2, y3,. Let the data be (t1, y1) and the latest data be (t2, y2). Here, assuming that the relative time of the transmission time of the next data to be transmitted is t3 and the estimated value of the plant data Y is y3 ', the estimated value y3' is given by the following equation.

Y3 '= (y2-y1) * (t3-t2) /
It is calculated by (t2-t1) + y2.

The estimated value calculating means 63 stores the estimated value calculated as described above for each input point in the estimated value storing database 6.
5 is stored.

The database 6 for storing the thinning allowable range determination rate
7 stores a thinning-out allowable range determination rate previously obtained for each input point.

The thinning-out judging means 69 compares the value y3 of the plant data Y at the transmission time t3 inputted to the process input processing means 3 with the estimated value y3 'stored in the estimated value storage database 65, The thinning is determined based on the thinning allowable range determination rate of the corresponding input point stored in the determination rate storage database 67.

For example, assuming that the thinning allowable range determination rate of the plant data Y is m (%) and the number of data transmissions (including y1 and y2) between the transmission times t1 and t2 is N, the input value y3 becomes Expression conditions

| Y3 −y3 '| ≦ ｛| y2 −y1 | / (N−
1) It is determined whether or not ｍ * m / 100 is satisfied.

The plant data thinning means 71 receives the result of the judgment by the thinning judging means 69, and when the difference between the input value y3 and the estimated value y3 'is within the allowable range, the latest data from the power generation operation history database 61 is read. (T2, y
If 2) is deleted and the value deviates from the allowable range, the latest data (t2, y2) is not deleted.

The data recording means 73 stores the plant data input by the process input processing means 3 in the power generation operation history database 61 together with the transmission time.

Next, the operation of the present embodiment will be described with reference to FIGS. When two or more data points are recorded in the power generation operation history database 61, the latest data and the second newest data are extracted from the power generation operation history database 61 by the estimated value calculation means 63 (step 500) and transmitted next. The estimated value that is considered to be calculated is calculated according to the formula [Equation 6] (step 501), and the estimated value is stored in the estimated value storage database 65.

Next, when the plant data transmitted from the unit computer is input by the process input processing means 3 (step 502), the thinning-out determination means 69 compares the input value with the estimated value in the estimated value storage database 65, It is determined whether or not the difference is within a thinning allowable range calculated on the right side of the inequality of [Equation 7] (step 50).
3). When the difference is within the allowable range of thinning, the power generation operation history database 61 is generated by the plant data thinning means 71.
, The latest data used in the calculation of the estimated value is deleted (step 504). At the same time, the plant data input by the process input processing means 3 is recorded in the power generation operation history database 61 by the data recording means 73 (step 5).
05). When the difference is not within the allowable range for thinning, or when two or more data points are not recorded in the power generation operation history database 61, the data recording means 7 is not deleted from the power generation operation history database 61 without deleting the data.
3, the plant data received this time is recorded in the power generation operation history database 61.

As is clear from the above description, according to the present embodiment, when the data transmitted from each unit computer changes linearly, the data recording size can be reduced. . In particular, the operation data of the plant hardly fluctuates during steady operation or when the plant is stopped, and tends to change almost linearly even when there is fluctuation. By using the recording method, it is possible to thin out a considerable amount of data.

FIG. 16 shows a sixth embodiment of the plant data collecting and recording apparatus according to the present invention, in which a process input processing means 3 for inputting plant data transmitted from a unit computer of a plant P; And the contact database 8 when the contact data inputted by the process input processing means 3 is different from the previous contact data.
1 and contact data collection and recording means 83 for recording.

Next, the operation of the present embodiment will be described with reference to FIGS.
9 will be described. The process input processing means 3 inputs plant data transmitted from the unit computer of the plant P in a reception data format including time and data of each input point as shown in FIG.

As shown in the flow chart of FIG. 18, the contact data collection / recording means 83 waits for the reception data shown in FIG. 17 which is input to the process input processing means 3 at a constant period (step 600). , Process input processing means 3
Then, the time of the data received from and the data at the input point 1 are read (step 601).

It is checked whether it is the first data in one day based on the time of the received data (step 602). In the first case, the input point, contact data and time are registered in the contact database 81 (603), and this registration is performed. The set contact data is set as the previous value (604).

In the case of the second and subsequent reception data, the input value of each input point is compared with the previous value (step 605). If they are the same, registration in the contact database 81 is not performed. Only when the data is changed in step 605, the current input value is registered in the contact database 81 and set as the previous value.

Thus, the contact database 81 contains
If the data value at a certain input point behaves as shown in FIG. 19, the point at which the data value does not change (time t1, t3, t4,
The contact data of t6) is not recorded, and the contact data (t0, 0), (t2, 1) of the start time and the time of each change point,
Only (t5, 0) is recorded.

As is clear from the above description, according to the present embodiment, the number of data and the number of data can be obtained by recording the contact data of only the changing points in the contact data transmitted at a constant period in the contact database. The size of the base can be reduced, and resources can be saved.

In the above-described embodiment, the plant data is stored and processed on a daily basis as the power generation operation data. However, for example, data with small fluctuations, such as contact data and constants of analog data, are stored in the data. The storage unit can be one month or one year, and a database with higher recording efficiency can be constructed.

The plant data collecting and recording apparatus of the above embodiment can be constructed as an object-oriented database. In this case, the operation program for accessing the power generation operation history data can be stored in the object-oriented database together with the stored power generation operation history data, so that the format of the power generation operation history database is changed. Even at this time, it is not necessary to change individual applications related to the power generation operation history database only by changing the operation program, and it is possible to minimize the ripple effect on the format change of the power generation operation history database.

[0105]

As described above, according to the present invention, the sectional plant data transmitted at a constant cycle is edited in time series, and at this time, several types of time series data having different recording cycles are created. By storing, time-series data can be stored for a long period of time and search speed can be improved.

Further, according to the present invention, the compressed value of the plant data is calculated from the maximum value and the minimum value of the plant data during a predetermined period, and the compressed value is stored as operation history data, thereby improving the data recording efficiency. As a result, data can be stored for a long period of time.

Further, according to the present invention, by changing the recording cycle of the plant data according to the event state of the plant at that time, for example, the recording cycle is shortened when starting and stopping, and the recording cycle is lengthened when the load is stable. Detailed recording can be performed according to the event, and data recording efficiency can be improved.

According to the present invention, with respect to plant data for each cycle of a predetermined period, the recording of the plant data is thinned out when the value is approximately equal to the value extrapolated in the cycle from the previously stored value and the stored value two times before. The recording capacity of the plant data can be reduced without impairing the purpose and use as the operation history data, and efficient data recording can be performed.

Further, according to the present invention, an estimated value which is expected to be transmitted next is calculated from past plant data, and when the estimated value is substantially equal to the actually transmitted value, the past plant data is calculated. By deleting the newest data from the operation history database, the data recording efficiency can be improved without impairing the purpose and use of the operation history data.

Further, according to the present invention, by recording only the data value at the time of the change in the contact data,
Data recording efficiency is improved, and data can be stored for a long time.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a plant data collection and recording device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a data configuration of a data collection temporary storage file 7 in FIG.

FIG. 3 is a diagram showing a data configuration of a time-series data storage file 11 in FIG.

FIG. 4 is a flowchart showing the operation of the time-series data storage means 9 in FIG.

FIG. 5 is a block diagram showing a plant data collection and recording device according to a second embodiment of the present invention.

FIG. 6 is a diagram showing a data configuration example of a plant database 21 in FIG.

FIG. 7 is the maximum / minimum compression database 27 in FIG.
FIG. 6 is a diagram showing an example of the data configuration of FIG.

8 is a flowchart showing the operation of the plant data collection and recording device shown in FIG.

FIG. 9 is a block diagram illustrating a plant data collection and recording device according to a third embodiment of the present invention.

FIG. 10 is a diagram illustrating a relationship between an event state (load stabilization, disconnection, ignition, and the like) of a plant and a recording cycle according to the third embodiment.

11 is a flowchart showing the operation of the plant data collection and recording device shown in FIG.

FIG. 12 is a block diagram illustrating a plant data collection and recording device according to a fourth embodiment of the present invention.

FIG. 13 is a flowchart showing the operation of the plant data collection and recording device shown in FIG.

FIG. 14 is a block diagram illustrating a plant data collection and recording device according to a fifth embodiment of the present invention.

15 is a flowchart showing the operation of the plant data collection and recording device shown in FIG.

FIG. 16 is a block diagram illustrating a plant data collection and recording device according to a sixth embodiment of the present invention.

FIG. 17 is a diagram showing an example of a reception data format of the process input processing means 3;

FIG. 18 shows a contact data collecting and recording means 83 in FIG.
6 is a flowchart showing the operation of the embodiment.

FIG. 19 is a diagram illustrating an example of transmission data of contact data.

[Explanation of symbols]

1 ... plant data collection and recording device, 3 ... process input processing means, 5 ... current data storage means, 7
..., Data collection temporary storage file, 9, time-series data storage unit, 11, time-series data storage file,
13: external storage device recording means, 15: data search means, 21: plant database, 23:
Maximum value / minimum value calculation means, 25: maximum / minimum compressed value creation means, 27: maximum / minimum compressed database, 2
9: Maximum / minimum compressed data storage means, 31: Plant event determination table, 33: Recording condition determination means, 35, 73 ... Data recording means, 37, 51,
61 power generation operation history database 41 maximum value / minimum value calculation means 43 maximum value / minimum value storage database 45 data thinning rate storage database 47 data thinning allowance Range calculation means, 49 ...
... Data thinning means, 53... Database deleting means, 63... Estimated value calculating means, 65... Estimated value storing database, 67... Means, 71: Plant data thinning means, 81: Contact database, 83: Contact data collection and recording means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroko Watanabe 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Toshiba Fuchu Plant, Inc. (72) Inventor Tetsuya Hirata 1-Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu Plant, Toshiba ( 72) Inventor Hideki Tsukahara 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu Plant, Toshiba Corporation (72) Inventor Katsunori Kodama 2-24-24 Harumi-cho, Fuchu-shi, Tokyo 1 Inside Toshiba System Technology Co., Ltd. (72) Invention Person Yukio Miura 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu plant of Toshiba Corporation

Claims (9)

[Claims] 1. A plant data collection and recording device for collecting plant data indicating an operation state of a plant and recording the data as operation history data, wherein a process input means for collecting plant data from the plant at a constant cycle; Current data storage means for storing plant data collected in a cycle in a data collection temporary storage file in a sectional format at each collection time, and extracting plant data in a cross-sectional format from the data collection temporary storage file, for each data item A time-series data storage unit that edits time-series data of a plurality of types of recording cycles and saves each in a time-series data storage file, and externally stores time-series data of a predetermined recording cycle stored in the time-series data storage file for a predetermined period of time. External storage device recorder to record to storage device When the plant data collecting recorder apparatus being characterized in that a data retrieval means for retrieving the operation history data specified from the time series data storage file or the external storage device based on a request from the operator. 2. A plant data collection and recording apparatus for collecting plant data indicating an operation state of a plant and recording the data as operation history data, comprising: a plant database for storing plant data collected from a plant for a predetermined period at a constant period; Maximum / minimum compression value creating means for compressing the plant data for the predetermined period within a predetermined reduced numerical range based on the maximum value and the minimum value of the plant data for the predetermined period in the database; A plant data collection and recording device comprising: a maximum / minimum compression database for storing data compressed by a value creating means. 3. A plant data collection and recording device for collecting plant data indicating an operation state of a plant and recording the data as operation history data, a process input means for inputting plant data from the plant at a constant cycle, and a judgment condition of a plant event. A plant event determination table storing the plant data, and determining the event state of the plant based on the plant data from the process input means and the determination condition of the plant event in the plant event determination table,
Recording condition determining means for determining a recording cycle of the plant data, and data recording means for recording plant data input by the process input means in an operation history database at a recording cycle determined by the recording condition determining means. An apparatus for collecting and recording plant data. 4. A plant data collection and recording device for collecting plant data indicating an operation state of a plant and recording the data as operation history data, comprising: a plant database for storing plant data collected from a plant at a constant period for a predetermined period; The plant data is extracted from the database in the order of collection, the first collected plant data and the second collected plant data are stored in the operation history database, and
For the collected plant data after the first time, if the value of the plant data already stored in the operation history database is approximately equal to the value extrapolated at the collection time from the latest and next newest plant data, the collection A data thinning unit for overwriting the plant data with the latest plant data in the operation history database. 5. A data thinning allowable range calculating means for calculating a data thinning allowable range based on a difference between a maximum value and a minimum value of plant data for a predetermined period in the plant database, wherein the data thinning means comprises: Regarding the collected plant data after the third time, the difference between the latest and the next newest plant data among the plant data already stored in the operation history database and the value extrapolated at the collection time is the data thinning tolerance. When the data is within the data thinning allowable range calculated by the range calculating means, the collected plant data is overwritten on the latest plant data in the operation history database, and the difference from the extrapolated value deviates from the data thinning allowable range. 5. The plan according to claim 4, wherein the operation history is stored in the operation history database. Data collection recording apparatus. 6. A data thinning rate storage database for storing a data thinning rate determined in advance for each input point of plant data, wherein the data thinning allowable range calculating means stores a data thinning rate of the plant data for a predetermined period in the plant database. A data thinning allowable range is calculated for each input point by multiplying a difference between a maximum value and a minimum value of each input point by a data thinning rate of a corresponding input point in the data thinning rate storage database. Item 6. A plant data collection and recording device according to Item 5. 7. A plant data collection and recording device for collecting plant data indicating an operation state of a plant and recording the data as operation history data, wherein the process input means receives plant data from the plant at a constant period, and the process input means Data recording means for recording the received plant data in the operation history database, and the plant data received this time in the process input means, from the latest and next newest plant data recorded in the operation history database to the current A plant data collection and recording device comprising: a plant data thinning unit that deletes the latest plant data from the operation history database when the value is substantially equal to the value estimated at the reception time. 8. A thinning allowable range determination rate storage database for storing a thinning allowable range determination rate of plant data at each input point, and a plant based on the latest and next newest plant data recorded in the operation history database. An estimated value calculating means for calculating an estimated value of plant data expected to be transmitted next, and the latest and next newest plant data recorded in the operation history database and the thinning allowable range determination rate storage database Calculating a thinning-out allowable range based on the thinning-out allowable range determination rate corresponding to the input point, and a difference between the estimated value calculated by the estimated value calculating means and the current received value corresponding thereto is within the thinning-out allowable range. The plant data so as to delete the latest plant data from the operation history database. Plant Data Collection recorder apparatus according to claim 7, characterized in that a thinning determination unit for requesting the pulling means. 9. A plant data collection and recording device for collecting plant data indicating an operation state of a plant and recording the data as operation history data, wherein: a process input means for inputting plant data from the plant at regular intervals; A contact database storing data, extracting contact data from plant data input by the process input means, comparing with the latest contact data stored in the contact database, and only when A contact data collection and recording means for recording the collected contact data in the contact database;