JPH11211519A - Data making-up method of electric power system monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the making-up for data deficit sure and easy. SOLUTION: A power amount change screen which can change separately measured values at the last data gathering time on the preceeding day and measured values at the lead data gathering time on that day is prepared. Validity of data gathering is automatically checked (S1, S2). At the time of deficit of data which have not yet been gathered, correction is performed by deficit making-up process and automatic re-calculation (S3-S5). In the case of a deficit that data change becomes higher than or equal to progress degree 50, the data is traced back to the lead data gathering time on that day by a data correction input (S6) in the preceeding time zone, and correction is performed by the defect making-up process and the automatic re-calculation (S6-S8).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power system monitoring system, and more particularly, to a method for compensating for a loss of power amount data.

[0002]

2. Description of the Related Art An electric power system monitoring system of this type is used to remotely monitor and control power equipment, which is located in substations and the like scattered in a jurisdiction area, when a railway company purchases power from the electric power company. This is a system for centralized monitoring / control using devices. The power amount processing in this power system monitoring system is as follows.

(1) Collection of power amount data [0003] Power amount data is power consumption measured by a watt hour meter (installed by a power company) installed in each substation. Counts from 000 to 99
9 is a cyclic counter value. The power system monitoring system collects power amount data periodically (every 00 minutes and 30 minutes) through the remote monitoring control device.

(2) Validity check of electric energy data The collected electric energy data is subjected to the following validity check to determine whether or not the data is missing data.

(A) Due to an abnormality in the remote monitoring control device, etc.
If the electric energy data cannot be collected in the system, the data in that time zone is regarded as missing data. FIG. 9A shows an example of loss of the electric energy data.

(B) When the difference between the collected power data (current value) and the power data collected 30 minutes ago (previous value) exceeds 50 counts due to replacement of the watt hour meter, etc.
The data in that time zone is defined as missing data. FIG. 9B
Shown in

[0007] The watt-hour meter is equipment installed by the power company and cannot set an initial value (reading value) of the counter value at the time of replacement.

(3) Storing of electric energy data The electric energy data whose validity has been checked contains measured values and 30
The minute power consumption is calculated and stored in the database. FIG. 9C shows an example of storing the electric energy data. The loss flag indicates whether or not the electric energy data collected at the time is missing data, and the measured value is the value of the electric energy data collected at the time. The measured value is stored, and the difference between the power data collected at the time and the power data collected 30 minutes ago is stored as the 30-minute power consumption.
Stores the total power consumption per minute.

The 30-minute power consumption is calculated as follows because the maximum counter value is 999, and is reset to 0 when the counter value exceeds 999.

(A) When previous value ≦ current value 30 minutes power consumption = current value−previous value (b) Previous value> current value 30 minutes power consumption = 1000−previous value + current value (4) Correction of power amount data In the validity check of power amount data, data determined to be missing data is corrected using the power amount change screen. An example of this screen is shown in FIG. 10, and there are two types of data correction methods, both of which are based on instructions from the operator.

(A) The measured value at the time when the lost data is obtained is input from the screen using a numeric keypad, and recalculated. (A) of FIG.
(C) shows changes in the screen and database contents.

(B) An instruction to compensate for the loss is issued from the screen, and the measurement value at the time when the loss data is obtained is automatically input and recalculated. FIGS. 12A to 12C show changes in screens and database contents.

The method of automatically calculating missing data according to the missing compensation instruction is a method in which the tendency of a change in power consumption in the same substation at the same time on the same week last week is proportionally distributed to the time zone of the missing data. It is.

FIG. 13 shows an example of this, in which missing data is estimated from the progress V1 and V2 on the same day of the previous week and the progress V3 in the same time zone on the current day. This estimating operation is obtained from the following equation by distinguishing between the case where the progress V1 is not “0” and the case where the progress V1 is “0”.

[0015]

When V1 ≠ 0 Missing data = previous measured value + (V2 × V3) / V1 When V1 = 0 Missing data = immediate measured value + V2 (5) Electric table data output stored The electric energy data is automatically output as a daily report on the electric power amount of the substation for the previous day when the day changes. The main output contents are as follows.

(A) Measured value (b) 30 minute power consumption (c) Daily total power consumption etc.

[0017]

There are the following problems in the conventional electric energy data collection and defect compensation methods.

(1) If missing data occurs during the periodic collection of electric energy data every 00 minutes and 30 minutes, the operator is alerted by an alarm or a driving control record, but the missing data is compensated. Is not performed without the instruction of the operator, so that it is necessary to call up the corresponding power amount change screen each time and correct it.

(2) When the operator compensates for missing data from the power amount change screen by inputting numeric keys, there is a possibility that a human error such as a mistake in inputting numerical values or erroneous correction of normal data may occur.

(3) When the watt hour meter is replaced by the power company, a maintenance work by the manufacturer is required each time. In this maintenance work, as shown in FIG. 14, missing data in the time zone is obtained by replacing the watt hour meter and stored in the database.

The maintenance work performed by the maker means that the measured value immediately before replacing the watt-hour meter and the measured value immediately after replacing the watt-hour meter are 30 times.
This is the task of patching the minute power consumption. Since the numerical value to be patched (30-minute power consumption) is known only at the site, a report is received from a local worker, and a recalculation is instructed to switch the daily total power consumption and the missing flag.

(4) The power consumption change screen and the book after the maintenance work by the manufacturer after the replacement of the watt hour meter by the power company are completed. There is a sense of incongruity although it is correct.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a data compensation method which ensures and facilitates compensation when data is lost.

[0024]

SUMMARY OF THE INVENTION The present invention automatically checks the validity of data every time power data is collected, and automatically performs a process of correcting missing data and recalculation of uncollected data when data loss occurs. When data loss exceeds a certain value, such as progress 50, due to watt hour meter replacement, etc., the measured value and database contents are automatically corrected retroactively to the first data collection time of the day by data compensation at that time Then, the following method is characterized.

In a power system monitoring system, power consumption data of a power facility is periodically collected for each time zone, and when a loss occurs in the collected data, the contents of the database are corrected by inputting data to a power amount change screen. When the power amount change screen is prepared, the measured value of the last data collection time of the previous day and the measured value of the first data collection time of the day corresponding to this time can be separately changed, and the power amount data is collected. Checks the validity, automatically performs data loss compensation processing and recalculation when data is lost due to uncollected data in the above check and stores it in the database, and in the above check the data whose difference from the previous value becomes a certain value or more At the time of data loss, the measured value in the time zone immediately before the data loss was changed using the power amount change screen, and the change was made to the first data collection time of the current day. And storing, in the database of each measurement performed automatically defect compensation process and recalculated retroactively.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a data compensation processing procedure according to an embodiment of the present invention. The power amount of each substation is collected at regular time intervals using a remote monitoring controller (S1), and the validity of the data is checked (S2). If it is valid, the data is stored in the database (S3).

In this validity check, if the power amount data cannot be collected by the system due to an abnormality of the remote monitoring control device and the data becomes uncollected and missing data, the power amount change screen is automatically called up and the loss amount is deleted. Data loss correction processing (S4) of the time of occurrence and correction by automatic recalculation (S4)
5) Store in the database. The method of calculating the data to be compensated is the same as the conventional method.

In this way, when missing data is generated, a change screen is automatically displayed, a data supplement instruction is given to the operator, and correction by the operator is simplified.

Next, when the difference between the current value and the previous value exceeds a certain value (hereinafter referred to as a progress rate of 50 counts) and becomes lost data due to replacement of the power meter or the like, data input using the numeric keypad (S6). Then, data is compensated by the loss compensation process (S7) and the automatic recalculation (S8) using the input data. These processes are performed as follows.

(A) As shown in FIG. 2, an item of time 24:00 has been added to the electric energy change screen. This item includes the time 24: the last data collection time of the previous day.
00 and the time at which the first data collection time of the day is 0:00
(In other words, the time at 24:00 on the current day and the time at 0:00 on the next day are also the same).

In the conventional method, since the data at 24:00 on the previous day and the data at 0:00 on the current day have the same value, only the item at 0:00 is prepared on the power amount change screen. Therefore, when the measured value at time 0:00 is corrected, the measured value at time 24:00 on the previous day is also rewritten in the database.

In this embodiment, if the measured value is corrected from the power amount change screen after data collection, the previous time 24:00
And time 0:00 of the day can be changed to different measured values. As a result, even if the measured value at time 0:00 of the day is changed, the data at time 24:00 of the previous day is not corrected, so that the total power consumption of the previous day is not affected. Further, human errors by the operator can be reduced.

This example will be described with reference to FIGS. FIG.
Shows a data correction screen at 0:00 of the day before correction and the contents of the database, and adds correction to the measured value “325” of the day. As a modification, FIG. 4 shows a case where the measurement value “324” is input using the numeric keypad using the screen of FIG. 2. The measurement value at 0:00 of the database of the day is modified to “324”. The measurement value at time 24:00 is not corrected as it is. In addition, time 0 of the day:
The 30-minute power consumption 30 is indicated by “1” before correction, but is corrected to “2” by automatic recalculation after correction.

(B) In the power amount change screen, the progress
The measurement value immediately before the measurement value that has become the missing data is input using the numeric keypad. The value to be input on the numeric keypad is a value obtained by subtracting the 30-minute power consumption received from the local worker from the measured value of the missing data.

This example is shown in FIG. 5 and FIG. FIG. 5 shows the contents of the power amount change screen and the database before correction. The watt hour meter is replaced at time 1:30, and the measured value at time 2:00 becomes missing data. The loss flag of 00 is “ON”.

FIG. 6 shows a case in which data is input using the numeric keypad. When the power consumption for 30 minutes until time 2:00 is notified to "2", the measured value at time 1:30 is changed to "78".
4 "is entered, and the contents of the database are also changed to the value.

(C) When the operator instructs to make up for the loss on the power amount change screen, the system automatically inputs the measured values up to 0:00 on the current day retroactively from the data input by the ten keys, and finally recalculates.

Note that the automatic calculation method of the loss data according to the loss compensation instruction is that the value obtained by subtracting the power consumption for 30 minutes from the measured value at the time when the numeric key is input is set as the measured value at the immediately preceding time. The processing is performed retroactively to 0:00 on the day.

This example is shown in FIGS. 7 and 8. FIG. 7 shows a case where a defect compensation instruction is performed, and the instruction is made at time 1:
Along with the change of 30, the measured values are automatically obtained and changed from the 30 minute power consumption of the database from time 0:00 to time 1:00 on the power amount change screen, and the contents of the database are also changed. .

FIG. 8 shows a case where a recalculation instruction is issued.
30 at 2:00 due to the change up to 1:00
Recalculate the minute power consumption and change the contents of the database. At this time, the loss flag is also returned to “OFF”.

Accordingly, data in each time zone up to the time of occurrence of the missing data is automatically compensated for the data loss of progress 50 or more, so that maintenance work by the manufacturer becomes unnecessary and input errors by the operator are reduced. it can.
In addition, the measured values before and after the missing data and the contents of the database are compensated for without a sudden change in numerical values, so that it is possible to eliminate a sense of discomfort on a screen or the like.

[0042]

As described above, according to the present invention, every time data is collected, the validity of the data is automatically checked.
When data loss occurs, the loss data is automatically corrected and recalculated for uncollected data. If data loss exceeds a certain value due to watt hour meter replacement, etc., the first data collection time of the day is corrected by data correction at that time. Since the measured values and the contents of the database are automatically corrected retroactively, compensation for missing data is made easier and more reliable. Specifically, the following effects are obtained.

(1) If missing data due to non-collection occurs in periodic collection of power amount data, the missing data is automatically compensated.

(2) In the collection of periodic electric energy data, if missing data whose progress is equal to or more than a certain value occurs due to replacement of a watt hour meter by a power company or the like, the missing data is partially automatically compensated. You.

(3) In the periodic collection of the electric energy data, if defective data whose progress is equal to or more than a certain value due to the exchange of the electric energy meter by the electric power company or the like is generated, the maintenance work by the manufacturer becomes unnecessary.

(4) In the case where loss of data whose progress is equal to or more than a predetermined value occurs due to replacement of a watt hour meter by a power company and the like, and thereafter data is supplemented, the power amount change screen and the book table as before are displayed. The sense of incongruity of the measured value disappears.

(5) It is possible to reduce human errors due to operator input errors and the like.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a process of filling missing data according to an embodiment of the present invention.

FIG. 2 is an example of a power amount change screen in the embodiment.

FIG. 3 shows data correction (before correction) on the day according to the embodiment.

FIG. 4 is data correction (after correction) of the day in the embodiment.

FIG. 5 is missing data (a progress rate of 50 or more) in the embodiment.
The defect (before correction).

FIG. 6 shows missing data (a progress rate of 50 or more) in the embodiment.
The missing data (data entry).

FIG. 7 shows missing data (50 or more progress) in the embodiment.
Of the defect (instruction).

FIG. 8 shows missing data (a progress rate of 50 or more) in the embodiment.
Of the defect (recalculation).

FIG. 9 shows a data loss example and a storage structure.

FIG. 10 is an example of a conventional electric energy change screen.

FIG. 11 shows a conventional example of filling in missing data by inputting numeric keys.

FIG. 12 shows a conventional example of filling a missing numeric keypad by a missing compensation instruction.

FIG. 13 shows a conventional method for automatically inputting missing data according to a missing compensation instruction.

FIG. 14 is an example of a conventional maintenance operation at the time of replacement of a watt hour meter.

Claims (1)

[Claims] 1. A power system monitor that periodically collects power consumption data in a power facility for each time zone, and corrects the contents of a database by inputting data supplementation to a power consumption change screen when a loss occurs in the collected data. In the system, the power amount change screen was prepared in which the measurement value of the last data collection time of the previous day and the measurement value of the first data collection time of the day corresponding to this time were separately changeable, and the power amount data was collected. When the validity is checked, when the data is lost due to no data collection in the above check, the loss correction processing and recalculation are automatically performed and stored in the database, and the difference from the previous value in the check becomes a certain value or more. When the data is lost, the measured value of the time zone immediately before the data is lost is changed using the electric energy change screen, and the change is performed at the time of collecting the first data of the current day. Data filling method of the power system monitoring system characterized by storing in the database the respective measurement values performed automatically defect compensation process and recalculated retroactively to.