JP5655172B1 - Protection relay replacement support device and replacement support method thereof - Google Patents

Abstract

[PROBLEMS] To automate the setting of a relay settling value even in a protective relay that does not have a serial communication line and cannot output the settling value or ladder program as communication data to the outside. An exchange support apparatus capable of improving and shortening the work time is provided. In order to solve the above problem, an exchange support apparatus for supporting maintenance exchange of a protective relay according to the present invention sequentially acquires screen information of setting information displayed on a display panel of an existing protective relay in units of screens. The image acquisition unit, the character recognition unit that recognizes the image of the screen information on a screen basis, and the recognition character string recognized by the character recognition unit are compared between the screens. A data character string extraction unit that extracts the setting information item name and setting contents from the screen information recognition character string, and a setting value output unit that outputs the setting information item name and setting contents to the newly installed protective relay And so on. [Selection] Figure 1

Description

  The present invention relates to an apparatus for supporting maintenance replacement of a protective relay or the like provided in a power receiving / transforming substation.

The receiving substation is connected to a protective relay that measures and protects overcurrent, overvoltage, undervoltage, ground fault overcurrent, ground fault overvoltage, and the like. These protective relays detect short-circuit faults and ground faults that occur in the system, and send control signals to the circuit breaker to disconnect the fault circuit from the system in order to suppress the influence of the faults on other parts. The electrical equipment is protected.
For example, an overcurrent protection relay detects the state of an overcurrent caused by a short circuit or overload on the basis of the current value of the line input via a current transformer (CT). Judgment is made.

  This protective relay uses an input conversion unit that inputs an electric quantity from a current transformer, an analog / digital (A / D) conversion unit that converts an analog quantity into a digital quantity, and an arithmetic operation using an A / D converted digital quantity And an arithmetic processing unit that performs sequence processing, an input / output unit that outputs a trip command, display / alarm signal, etc., an operation unit that sets a relay set value, etc. and an operating state of the device, a display unit that displays a measurement state, etc. It consists of each functional part. Then, set values such as a relay set value and a CT ratio / PT ratio are stored in the internal memory. The control sequence is also stored as a ladder program.

  Some protective relays can monitor a plurality of systems, some have the above-described plurality of measurement / protection functions, and others can set a plurality of types of timing characteristics. In these protective relays, it is necessary to set a large number of setting values and programs for the protection function operation.However, when the operator resets from the operation panel of the new protective relay, such as when replacing the protective relay. Causes problems such as missing settings, incorrect settings, and increased man-hours for setting.

  For this reason, there is a technology for providing a protective relay with a communication line such as a serial connected to an external device, and reading and writing setting data and programs such as set values all at once from a monitoring device connected to the communication line ( For example, see Patent Document 1). According to this technique, it is possible to greatly reduce the time for setting the settling value, and it is possible to improve work quality because there is no erroneous setting or omission of setting.

JP 2004-072840 A

However, many existing protective relays do not have a communication line such as a serial and do not have an interface with the outside. When replacing these protective relays, the setting values and ladder programs of the currently operating protective relays are displayed on the display screen of the protective relays. Setting is performed manually from the operation panel.
It is difficult to eliminate manual setting errors, and it is also difficult to shorten the work time. During the replacement work of the protective relay, it is necessary to stop using the power equipment because the protection function of the power system is lost. For this reason, it is desirable that the replacement time of the protective relay is short.

  The purpose of the present invention is not to provide a communication line such as serial, and even in a protective relay that cannot output the settling value and ladder program set as communication data to the outside, it automates the setting work of the relay settling value, An object of the present invention is to provide an exchange support apparatus capable of improving reliability and shortening work time.

  In order to solve the above problems, an exchange support apparatus for supporting maintenance exchange of a protective relay according to the present invention includes an image acquisition unit that sequentially acquires screen information of setting information displayed on a display panel of an existing protective relay in units of screens. The character recognition unit that recognizes the image of the screen information on a screen-by-screen basis and the recognized character string recognized by the character recognition unit are compared between the screens, and when there is a difference in the recognized character string between the screens, A data character string extraction unit that extracts the setting information item name and setting contents from the screen information recognition character string; and a setting value output unit that outputs the setting information item name and setting contents to the newly installed protective relay I did it.

  In addition, the replacement support method for supporting the migration of the setting information at the time of maintenance replacement of the protective relay of the present invention sequentially acquires the screen information of the setting information displayed on the display panel of the existing protective relay in units of screens, and acquires the information. The screen information is recognized, and the recognized character string of the setting information is compared between the acquired screens. When the recognized character string is different between the acquired screens, the setting information is obtained from the recognized character string of the screen information. In addition, the setting information item name and setting contents are extracted, and the setting information type and the extracted item name and setting contents are set in the newly installed protective relay.

  In another aspect, an exchange support method for supporting migration of setting information at the time of maintenance and replacement of a protective relay according to the present invention includes a character string representing a type of setting information of an existing protective relay and a setting item name for each type. The character string to be displayed and the character string to represent the setting contents are displayed with the characters arranged in a grid pattern. The screen information of the setting information is sequentially acquired for each screen, and the acquired screen information is subjected to character recognition processing and screen information. If the first character string position of the character string of the screen information is different between the acquired and character-recognized screens, the type of the setting information is detected from the character string of the screen information. When there is a difference in the character string at the second character string position defined for each type of the setting information among the screens obtained and character-recognized, the screen information Extract the setting item name and setting contents from the character string. It was to set the setting item names and setting content type and the extracted of the serial configuration information to the protection relay of the newly established.

  According to the present invention, even in an existing protective relay that is not provided with a serial communication line or the like, the reliability of replacement work can be improved and the work time can be shortened.

It is a conceptual diagram of the system to which an exchange assistance apparatus is applied. It is a figure which shows the structure of an exchange assistance apparatus. It is a figure which shows the structure of the display screen of a protection relay. It is a figure which shows the example of a display pattern of a ladder program. It is a figure which shows the example of a display pattern of a parameter. It is a figure which shows the example of a display pattern of a Ry settling value. It is a figure which shows the example of a display pattern of PCT ratio. It is a read processing flowchart of a ladder program. It is a parameter value reading processing flowchart. It is a reading process flowchart of a Ry set value. It is a reading process flow figure of PCT ratio. It is a figure which shows the table structure of a rule. It is a conceptual diagram of the other system to which an exchange assistance apparatus is applied.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing an outline of replacement work of a protective relay to which the replacement support device 1 of the present embodiment is applied.

The exchange support apparatus 1 of the embodiment is connected to a camera 2 and is displayed on a display panel 5 of an existing protective relay 3 in operation, set values, measurement conditions (PT ratio, CT ratio, etc.), ladder program, etc. Is captured, character information is recognized by analyzing the captured screen information, and setting information such as a set value, a measurement condition, and a ladder program of the existing protective relay 3 is acquired.
The acquired setting information of the protective relay 3 is converted into setting information of a new protective relay 4 to be exchanged with the protective relay 3 and transferred via a communication line, or a removable medium such as a USB memory. The setting information is recorded and read into the protective relay 4.

Here, the outline | summary of the function of the protection relay 3 of an Example is demonstrated.
The protective relay 3 is used for power reception, transformer protection, feeders, and busbars. The measurement CT (current transformer) or VT (transformer) connected to the PCT input allows the current value of the line to be A voltage value is input. The protective relay 3 is equipped with a microcomputer and measures current, voltage, active power, reactive power, power factor, frequency, zero-phase current, zero-phase voltage, etc. based on the current value and voltage value from the PCT input. Do it. Also, based on the current value and voltage value from the PCT input, protection processing of instantaneous overcurrent, overcurrent, ground fault overcurrent, ground fault direction, ground fault overvoltage, undervoltage, overvoltage, voltage, ratio differential, Outputs a trip signal. The protection process is controlled by a ladder program and can be designed by the user according to the specifications.

For the operation of the above measurement and protection functions, the protective relay 3 includes relay set values for setting operation values and time limits of various protection relays, measurement conditions for setting PT ratios and CT ratios, usage methods of the apparatus, Set parameters for setting PCT connection, measurement display, protection relay operation, etc.
Relay setting values, measurement conditions, parameters, and ladder program setting information are stored in nonvolatile memory.
Since the protective relay 4 is an alternative device of the protective relay 3, it has at least the above-described function, and the difference in characteristics is corrected when the setting information of the protective relay 4 is generated.

Setting information of the protective relay 3 such as set values, measurement conditions (PT ratio, CT ratio, etc.), parameters, ladder programs, etc. are displayed in text on the display panel 5 by pressing the operation button 6 even while the protective relay 3 is in operation. . 4 to 7 show examples of display (details will be described later).
The setting information of the protective relay 3 has many items (for example, about 100 items), and is displayed on the display panel 5 for each item when the operator presses the operation button 6. The exchange support device 1 of the embodiment captures the display content of the display panel 5 of the protective relay 3 by the camera 2, performs image processing on the captured display content, performs character recognition, and extracts a plurality of setting information.

  As described above, since the replacement support apparatus 1 extracts the setting information of the protective relay 3 based on the screen information captured by the camera 2, the positional relationship between the display panel 5 and the camera 2 is fixed and a clear image is obtained. It is desirable to be able to shoot. In order to realize this, an attachment jig (not shown) for fixing the camera 2 in front of the display panel 5 may be provided. Further, when the display panel 5 is a reflective liquid crystal display device, an illuminating means may be provided on the mounting jig.

As described above, after reading the setting information such as the set value, measurement conditions (PT ratio, CT ratio, etc.), parameters, ladder program, etc. of the existing protective relay 3 and replacing the protective relay 3, The read setting information is written to the protective relay 4 via the communication line, or the read setting information is recorded on a removable medium such as a USB memory, and is read by the new protective relay 4.
In addition, the setting information is read from the existing protective relay 3 at the site, written to the protective relay 4 newly installed at the factory, and the set protective relay 4 is carried to the site for replacement.
Thereby, the existing protective relay 3 can be replaced with a new protective relay 4 having the same function.
Before describing the details of the exchange support apparatus 1 of the embodiment, another configuration of the exchange support apparatus 1 of the embodiment will be described.

FIG. 13 is a conceptual diagram of another system to which the exchange support apparatus is applied.
Specifically, the exchange support apparatus 1 shown in FIG. 1 is configured by a tablet 9, a data conversion PC 10, and a removable medium for exchanging data between the tablet 9 and the data conversion PC 10. ing.
Here, the tablet 2 is externally connected to the camera 2 and images the display panel 5 of the existing protective relay 3 in operation. Alternatively, a camera built in the tablet 9 may be used.

Based on the imaging information of the display panel 5 captured by the camera 2 or the built-in camera of the tablet 9, the setting information of the existing protective relay 3 is acquired by the procedure described in detail later. The acquired setting information is stored in the memory card 22 and transmitted to the data conversion PC 10.
In the data conversion PC 10, the setting information of the existing protective relay 3 on the memory card 22 is converted into the setting information of the new protective relay 3 and written to the new protective relay 3.
The exchange support device 1 described below includes the tablet 9 described above.

FIG. 2 shows the configuration of the exchange support apparatus 1 of the embodiment.
In the exchange support apparatus 1, a video signal of the camera 2 that captures a display image on the display panel 5 of the protective relay 3 is input at the camera input unit 11. The input video signal of the display panel 5 is thinned by the image acquisition unit 12 to a frame rate suitable for extracting the setting information of the protective relay 3. Specifically, a time-series image of about 10 frames / second is generated according to the character recognition / extraction performance described later.

  As will be described in detail later, the image acquisition unit 12 records an image of the display panel 5 corresponding to the character string extracted frame in the acquired image recording unit 14 in response to a capture instruction from the data character string extraction unit 17. At the same time, it is output to the camera image display unit 13. The camera image display unit 13 displays this image on the display unit 7 (see FIG. 1) of the exchange support apparatus 1.

The character recognition unit 15 performs character recognition processing for each frame of the time-series image thinned out on the display panel 5 and recognizes all character strings displayed on the display panel 5.
Further, the character recognition unit 15 outputs the recognized character to the recognized character string display unit 16 in response to the capture instruction from the data character string extraction unit 17. The recognized character string display unit 16 displays the recognized character string of this frame on the display unit 7 of the exchange support apparatus 1.

In accordance with the capture instruction from the data character string extraction unit 17, the recognized character string that has been recognized and the image of the display panel 5 that has been recognized are displayed in parallel on the display unit 7 of the exchange support apparatus 1. Thereby, the correctness of character recognition can be visually determined. After the visual check, the operator presses the operation button 6 to display the next setting information.
The character recognition unit 15 can improve the recognition rate by performing analysis only on characters displayed on the display panel 5 (for example, alphanumeric / kana use characters). However, the recognition rate may decrease when dot missing due to a failure of the display panel 5 occurs. As described above, if the image of the display panel 5 and the recognized character string are displayed in parallel so that the recognized character can be corrected, the reliability of the setting information transfer operation is improved.

  The data character string extraction unit 17 detects a change in the recognized character string between frames, and recognizes that the display of the setting information on the display panel 5 of the protective relay 3 has changed. This is suitable for detecting that the operator has changed the setting information item by pressing the operation button 6 of the protective relay 3. That is, the exchange support apparatus 1 can automatically detect a change in the setting information item.

  Instead of the above, every time the display of the setting information on the display panel 5 of the protective relay 3 is changed, the setting information acquisition button (shutter button) provided in the replacement support device 1 is pressed to perform imaging, and the captured image is converted to text. It goes without saying that the setting information may be acquired by recognition.

  Further, the data character string extraction unit 17 determines the set value / measurement condition (PT ratio, CT) of the protective relay 3 from the recognized character string corresponding to the display content of the display panel 5 of the protective relay 3 based on the extraction rule described later. Ratio etc.) ・ Extract setting information such as ladder programs. The extracted setting information is stored in the extracted character string recording unit 18 and output to the format conversion unit 19.

The format conversion unit 19 converts the extracted setting information of the existing protective relay 3 into the format of the setting information of the new protective relay 4 and outputs it to the set value output unit 20.
The setting value output unit 20 transfers the converted setting information to the newly installed protective relay 4 via the communication line, or records the setting information on a removable medium such as a USB memory as a reading medium of the protective relay 4 To do.
The operation unit 21 is an operation unit that instructs control of the above-described units, and includes human interface devices such as a mouse, a keyboard, and a touch panel.

In the above description, the configuration in which the camera 2 is provided outside the exchange support device 1 is shown, but the configuration in which the camera 2 is built in the exchange support device 1 may be used.
In addition, it is possible to shoot a moving image on the display panel 5 of the existing protective relay 3 using a video camera, and connect the video camera to the replacement support device 1 instead of the camera 2. In this case, setting information such as set values, measurement conditions (PT ratio, CT ratio, etc.), parameters, ladder programs, and the like of the existing protective relay can be acquired without being on-site.

  The functional units such as the character recognition unit 15, the data character string extraction unit 17, and the format conversion unit 19 can be realized by a program of a microcomputer mounted on the exchange support apparatus 1. The outline of the processing executed by the microcomputer is shown in the flowcharts of FIGS.

  FIG. 3 is a diagram showing an outline of the display on the display panel 5 of the protective relay 3. The display panel 5 is composed of a liquid crystal type dot matrix display device. For example, as shown in FIG. 3, the fixed-pitch characters can be displayed for 4 lines and 20 characters. Note that the 80 square frames in FIG. 3 are guides representing character display areas, and are not actually displayed.

  Next, examples of display of the setting information of the protective relay 3 are shown in FIGS. 4A and 4B are diagrams showing examples of display patterns of ladder programs, FIG. 5 is a diagram showing examples of display patterns of parameters, and FIG. 6 is a diagram showing examples of display patterns of Ry settling values. FIG. 7 is a view showing an example of a display pattern of the PCT ratio. Hereinafter, the contents of the display pattern will be described in order.

The display pattern shown in FIG. 4 (a) displays the contents of one step of the ladder program, and transitions to the next step shown in FIG. 4 (b) when the operation button 6 (see FIG. 1) is pressed. .
The display pattern of the ladder program shown in FIGS. 4A and 4B is configured as follows.

In the character area 41 (first to seventh characters on the first line), a character string “PROGRAM” indicating that the display content is a ladder program is displayed. The contents of the steps of the ladder program to be displayed are represented in the character area 42 (second line). In the character area 43 (13th to 20th characters on the first line), a character string “STEP:” indicating the position of the program of the display content and a 3-digit step number are displayed. The character area 44 (18th to 20th characters on the fourth line) shows the total number of steps of the ladder program.
In addition, the fourth line displays a character string of “E00” (no error) indicating the operation number, “LOW” indicating the shift state of the operation button 6 and “RUN” indicating the operation mode of the apparatus. Yes.

As described above, FIG. 4B displays the contents of the step subsequent to the step displayed in FIG. Therefore, the same contents are displayed in the character area 41 and the character area 44, and the character area 42 and the character area 43 have different display contents.
Specifically, the character area 43 is “STEP: 001” in FIG. 4A, but is “STEP: 002” in FIG. 4B which is the display of the next step. .

The data character string extraction unit 17 recognizes the character string “PROGRAM” in the character area 41 and recognizes that the display content is a ladder program display. Then, the change of the display content is determined based on the sequence number of the step in the character area 43, and the character string of the step content of the ladder program is extracted from the character area 42.
When the sequence number of the step in the character area 43 matches the total number of steps recognized in the character string area 44, it is recognized that all steps have been displayed.

  Further, when a change in display content is determined based on the sequence number of the step in the character area 43, a capture instruction is notified to the image acquisition unit 12 and the character recognition unit 15. A more detailed processing flow will be described later.

In the parameter display pattern shown in FIG. 5, one of a plurality of parameters set in the protective relay 3 is displayed. Then, when the operation button 6 (see FIG. 1) is pressed, the contents of other parameters are displayed.
At this time, a character string of “parameter” indicating that the display content is a parameter display is displayed in the character area 51 (first to sixth characters on the first line), and the character area 52 and the character area 53 (two lines). The contents of the parameter are displayed in
The parameter contents are displayed in a character area 52 (first to fourth characters) where a parameter item number (parameter number) is displayed and a character area 53 where a parameter value which is a setting value of the item is displayed. (5th to 20th characters).
In addition, the fourth line displays a character string of “E00” (no error) indicating the operation number, “LOW” indicating the shift state of the operation button 6 and “RUN” indicating the operation mode of the apparatus. Yes.

The data character string extraction unit 17 recognizes the character string of “parameter” in the character area 51 and recognizes that the display content is a parameter display. Then, a change in display content is determined based on the parameter item number (parameter number) in the character area 52, and the character string extraction of the parameter item and its value is performed using the character area 52 and the character area 53.
Further, when it is determined that the display content of the parameter item number (parameter number) in the character area 52 is changed, a capture instruction is notified to the image acquisition unit 12 and the character recognition unit 15. A more detailed processing flow will be described later.

In the Ry set value display pattern shown in FIG. 6, one of the set values of the protective relay 3 is displayed. Then, when the operation button 6 (see FIG. 1) is pressed, the contents of other settling values are displayed.
At this time, in the character area 61 (1st to 8th characters in the first line), a character string of “relay search” indicating that the display content is the display of the Ry set value is displayed, and the character area 62 (1 line) The feeder name (distribution line name) is displayed in the 10th to 15th characters), and the character area 63 (17th to 20th characters in the first line) and the character area 64 (1st to 13th characters in the second line) are displayed. The element item name meaning the set value of the operating current is displayed, and the content of the set value is displayed in the character area 65 (14th to 20th characters in the second line).
In addition, the fourth line displays a character string of “E00” (no error) indicating the operation number, “LOW” indicating the shift state of the operation button 6 and “RUN” indicating the operation mode of the apparatus. Yes.

The data character string extraction unit 17 recognizes the character string of “relay sense” in the character area 61 and recognizes that the display content is the display of the Ry set value. Then, a change in display content is determined based on the feeder name and element item name of the character area 62 or the character area 63 or the character area 64, and the Ry set value is determined by the character area 62, the character area 63, the character area 64, and the character area 65. Extracts the character string of the element item name and its value.
Further, when it is determined that the display content of the character area 62, the character area 63, or the character area 64 is changed, a capture instruction is notified to the image acquisition unit 12 and the character recognition unit 15. A more detailed processing flow will be described later.

  Note that the display pattern of FIG. 6 is not only for the setting of the operating current set value described above, but also for the display of Ry set values such as operating time magnification, time limit characteristics, time settling, voltage settling, sensitivity angle, drop time, settling ratio, etc. Applied.

In the PCT ratio display pattern shown in FIG. 7, a set value such as a plurality of PT ratios and CT ratios, which are measurement conditions of the protective relay 3, is displayed. When the operation button 6 (see FIG. 1) is pressed, the contents of other set values are displayed.
At this time, a character string of “PT / CT HI” indicating that the display content is a display of set values of measurement conditions such as PT ratio and CT ratio in the character area 71 (1st to 6th characters in the first line). Is displayed.
Then, the feeder name (distribution line name) is displayed in the character area 72 (10th to 15th characters in the first line), and the character area 73 (17th to 20th characters in the first line) and the character area 74 (second line). 1 to 13th character) displays element item names representing the classification of measurement conditions such as CT ratio, and the set value (CT ratio) is displayed in the character area 75 (14th to 20th characters on the second line). Is displayed. An outline of measurement conditions is displayed in the character area 76 (11th to 20th characters in the third line).
In addition, the fourth line displays a character string of “E00” (no error) indicating the operation number, “LOW” indicating the shift state of the operation button 6 and “RUN” indicating the operation mode of the apparatus. Yes.

The data character string extraction unit 17 recognizes the character string “PT · CT HI” in the character area 71 and recognizes that the display content is a display of the set value of the measurement condition. Then, a change in display content is determined based on the feeder name and element item name in the character area 72, the character area 73, or the character area 74, and the measurement condition element is determined by the character area 72, the character area 73, the character area 74, and the character area 75. Extracts the character string of the item name and its value.
Further, when it is determined that the display contents of the character area 72, the character area 73, or the character area 74 have changed, a capture instruction is notified to the image acquisition unit 12 and the character recognition unit 15. A more detailed processing flow will be described later.

  The display pattern of FIG. 7 is a display of measurement conditions such as PT (transformation) ratio, ZCT (zero-phase current transformation) correction value, GPT (grounding transformation) ratio, etc., in addition to the above-described CT (current transformation) ratio setting. Also applies.

  The arrangement of the display pattern of the protective relay 3 shown in FIG. 4 to FIG. 7 is an example, and other arrangements may be used. However, according to a predetermined display rule, a set value, a measurement condition, a parameter, a ladder program, etc. Each setting information must be displayed one after another. The exchange support apparatus 1 stores an extraction rule corresponding to the display rule, and reads setting information based on the extraction rule.

  The maintenance exchange support device 1 may include a storage unit (not shown) that includes an extraction rule table in which the display position of the setting information is recorded for each model of the protection relay 3 that performs maintenance exchange. In this case, at the start of reading, the model name is input and the extraction rule table is selected.

Next, a flow of processing for reading setting information from the display patterns of FIGS. 4 to 7 will be described.
FIG. 8 is a diagram showing a flow of processing for reading the ladder program of the protective relay 3 whose display pattern is shown in FIG.
First, the camera 2 captures screen information by photographing the display panel 5 of the existing protective relay 3 (S101). Next, the acquired screen information is analyzed, and character recognition of a predetermined area size (4 lines, 20 characters) is performed (S102). At this time, the display panel 5 displays characters of 4 lines and 20 characters at a fixed pitch using a monospaced font.

  The character recognition process is performed by a known recognition technique. At this time, character recognition may be performed by limiting to characters displayed on the existing protective relay 3 (for example, English characters, partial characters of kana). This can improve the character recognition rate and reduce the recognition processing load.

Steps S101 and S102 are performed in a predetermined cycle, and the entire recognized character string of the display panel 5 photographed and recognized last time is compared with the current recognized character string (S103), and the entire display area of the display panel 5 is compared. If the character strings are the same, the process returns to S101 (same as S103). If even part of the character string is different, the process proceeds to the next step (S104) (difference in S103).
Thereby, the change of the display content of the display panel 5 when an operator depresses the operation button 6 of the existing protective relay 3 is detected. Next, the arrangement state and display contents of the character string are determined, and the item element of the setting information is read.

In S104, it is determined whether or not the character area 41 (see FIG. 4A) is different from the recognized character string of the screen information captured and recognized last time. If it is different, the process proceeds to S105 (in S104). Yes). In S105, it is determined whether or not the difference character is “PRGRAM”. If Yes, the display content displayed on the display panel 5 of the protective relay 3 is determined to be a ladder program. The process extraction mode is set to the ladder program process (S106). Then, the process proceeds to reading the step contents of the ladder program (label A).
If the difference character is not “PRGRAM” in S105, processing for another display type is performed (S107).
If the character area 41 is the same (No in S104) in S104, the process proceeds to S108.

In S108, it is determined whether or not the extraction mode of the reading process is a ladder program. If it is not the extraction mode of the ladder program (No in S108), a processing error (Error) is determined.
If the extraction mode of the reading process is a ladder program in S108 (Yes in S108), the process proceeds to S109, and the program step is read.
In S108, the process also transitions when S104 is No. This transition occurs when the ladder program step display is continued.

  First, it is determined whether or not the character region 43 is different (S109). If the character region 43 is different (Yes in S109), it is determined whether or not the character region 43 includes a character “STEP:” (S110). ). If the character area 43 is the same (No in S109), or if “STEP:” is not included in the character area 43 (No in S110), the current display content is not a ladder program, and abnormal processing is performed. (Error).

  In S109 and S110, if the display content of the character area 43 is different from the previous time (Yes in S109) and the character area 43 includes the characters “STEP:” (Yes in S110), the ladder program extraction mode Then, the following processing is performed.

  First, a capture instruction is output to the image acquisition unit 12 and the data recognition unit 15 (S111). As a result, the screen information obtained by photographing the display contents of the display panel 5 of the protective relay 3 when the ladder program is read and processed is recorded in the acquired image recording unit 14 as the processing history, and the photographed screen information and the character recognition are performed. The result is output to the camera image display unit 13 and the recognized character string display unit 16 so that visual confirmation can be performed.

Next, a step number is extracted from the character area 43 as an identifier of the reading item (S112). Then, the final step number is extracted from the character area 44 (S113), and it is determined whether the step number of the character area 43 is equal to or smaller than the final step number (S114).
As a result, the step number recognized by the character is verified.
Further, in addition to the final step number check in S112 and S113, the update state of the step number (update one at a time, etc.) may be verified.

If the step number of the character area 43 is larger than the final step number of the character area 44 in S114 (No in S114), there is a possibility that the character recognition of the step number is abnormal, and an error process is performed (Error).
If the step number is equal to or smaller than the final step number in S114 (Yes in S114), the contents of the program step are extracted from the character area 42 (S115).

By repeating the above processing, the replacement support device 1 can acquire a ladder program that is displayed step by step on the display panel 5 of the protective relay 3.
When the operator operates the protective relay 3 to display the ladder program on the display panel 5 in steps, the replacement support apparatus 1 automatically acquires the program, thereby improving the reliability of data migration and the ease of operation. can do.

FIG. 9 is a diagram showing a processing flow for reading the parameters of the protective relay 3 whose display pattern is shown in FIG.
S201, S202, and S203 in FIG. 9 are the same processes as S101, S102, and S103 in FIG.

In S204, it is determined whether the character area 51 (see FIG. 5) is different from the recognized character string of the screen information captured / recognized last time. If it is different, the process proceeds to S205 (Yes in S204). In S205, it is determined whether or not the difference character is “parameter”, and if “Yes”, it is determined that the display content displayed on the display panel 5 of the protective relay 3 is the parameter setting value, and so on. The process extraction mode is set to parameter value processing (S206). Then, the process proceeds to reading the parameter contents (label B).
If the difference character is not “parameter” in S205, processing of another display type is performed (No in S205).
If the character area 51 is the same (No in S204) in S204, the process proceeds to S207. This transition occurs when other item elements of the parameter value are continuously displayed.

In S207, it is determined whether or not the extraction mode of the reading process is a parameter value. If it is not the parameter setting value extraction mode (No in S207), a processing error (Error) is determined.
If the extraction mode of the reading process is a parameter value in S207 (Yes in S207), the process proceeds to S208.

Next, it is determined whether or not the character area 52 is different (S208). If the character areas 52 are the same (No in S208), the current display content is not a parameter value, and abnormal processing is performed (Error).
If the display content of the character area 52 is different from the previous time in S208 (Yes in S208), the parameter setting item number and the parameter value are read as the parameter value extraction mode.

  First, a capture instruction is output to the image acquisition unit 12 and the data recognition unit 15 (S209). As a result, the screen information obtained by photographing the display content of the display panel 5 of the protective relay 3 when the parameter value is read and processed is recorded in the acquired image recording unit 14 as the processing history, and the photographed screen information and the character recognition are performed. The result is output to the camera image display unit 13 and the recognized character string display unit 16 so that visual confirmation can be performed.

  Next, the parameter item number is extracted from the character area 52 as the identifier of the reading item (S210). Then, the parameter value is extracted from the character area 53 (S211).

By repeatedly performing the above processing, the exchange support device 1 can acquire parameter setting values to be displayed item by item on the display panel 5 of the protective relay 3.
If the operator operates the protective relay 3 to display the parameter setting values on the display panel 5 item by item, the replacement support device 1 automatically acquires the parameter item number and parameter value, so that the data migration reliability And ease of operation can be improved.

FIG. 10 is a diagram showing a processing flow for reading the Ry set value of the protective relay 3 whose display pattern is shown in FIG.
Since S301, S302, and S303 in FIG. 10 are the same processes as S101, S102, and S103 in FIG. 8, a description thereof is omitted here.

In S304, it is determined whether the character area 61 (see FIG. 6) is different from the recognized character string of the screen information captured / recognized last time. If the character area 61 is different, the process proceeds to S305 (Yes in S304).
In S305, it is determined whether or not the difference character is “relay adjustment”. If Yes, it is determined that the display content displayed on the display panel 5 of the protective relay 3 is the Ry set value. Then, the extraction mode of the subsequent processing is set to processing of the Ry set value (S306). Then, the process proceeds to reading the contents of the set value.
If the difference character is not “relay adjustment” in S305, processing of another display type is performed.
If the character area 61 is the same (No in S304) in S304, the process proceeds to S307. This transition occurs when other item elements of the Ry set value are continuously displayed.

In S307, it is determined whether or not the extraction mode of the reading process is the Ry settling value. If the extraction mode is not the Ry settling value extraction mode (No in S307), the process is abnormal (Error).
If the extraction mode of the reading process is the Ry set value in S307 (Yes in S307), the process proceeds to S308.

In S308, it is determined whether or not the display content of the character area 62 is different from the previous one, and a change in the display content of the feeder name which is one of the item identifiers of the Ry set value is determined.
If there is no change in the feeder name (No in S308), the process proceeds to S309, and a change in the Ry element name in the character area 63 is determined (S309).
If there is no change in the display of the Ry element name in S309 (No in S309), the process proceeds to S310, and a change in the Ry element name in the character area 64 is determined (S310).

As described above, in S308, S309, and S310, it is determined whether there is a change in the display contents of the character area 62, the character area 63, and the character area 64, and the character areas 62, 63, and 64 are the same as the previous display contents. In the case (No in S308, No in S309 and No in S310), the current display content is determined not to be the Ry set value, and abnormal processing is performed (Error).
In S308, S309, and S310, at least one character area of the character area 62, the character area 63, and the character area 64 is different from the previous display content (Yes in any of S308, S309, and S310). Then, the process proceeds to S311.

  In S <b> 311, a capture instruction is output to the image acquisition unit 12 and the data recognition unit 15. Thereby, the screen information obtained by photographing the display content of the display panel 5 of the protective relay 3 when the Ry settling value is read and processed is recorded as the processing history in the acquired image recording unit 14, and the photographed screen information and the character information are recorded. The recognized result is output to the camera image display unit 13 and the recognized character string display unit 16 so that visual confirmation can be performed.

  Next, the parameter item number is extracted from the character area 62, the character area 63, and the character area 64 as an identifier of the reading item (S312). Then, a set value is extracted from the character area 65 (S313).

By repeatedly performing the above processing, the replacement support device 1 can acquire the Ry set value displayed on the display panel 5 of the protective relay 3 item by item.
If the operator operates the protective relay 3 to display the Ry set value on the display panel 5 item by item, the replacement support device 1 automatically obtains the set number item number and set value. Reliability and ease of operation can be improved.

FIG. 11 is a diagram showing a processing flow for reading the PCT ratio of the protective relay 3 whose display pattern is shown in FIG.
As is apparent from the display patterns of FIGS. 7 and 6, the two display patterns are similar. For this reason, the processing flow of FIG. 11 has the same processing contents as the processing of FIG. For this reason, explanation is omitted here.

As is apparent from the flow charts of FIGS. 8 to 11, the display contents of the character areas 41, 51, 61, 71 starting from the first character on the first line of the display panel 5, the type of display contents (ladder program, parameter, Ry (Setting value, PCT ratio) is determined, and processing for reading item identifiers and setting values displayed at different display positions is performed according to each type.
In order to perform the above processing easily, it is preferable to create the reading rule shown in FIG. 12 and perform the processing.

  The reading rule of FIG. 12 includes a first rule table that indicates the correspondence between character string arrangement information and character strings representing types, character string arrangement information and item identifiers provided for each type of display content, It consists of a second rule table indicating the contents of the set values. Here, the arrangement information of the character string is defined as [first character line: first character position]-[tail character line: last character position].

  The data character string extraction unit 17 refers to the first rule table to obtain the combination of the character string representing the character string arrangement information and the character string satisfying the screen information of the display panel 5 recognized as the character, and the type of the display content Is identified. Next, referring to the second rule table, the character string is extracted according to the arrangement information of the character string, and the read item name and its set value are acquired.

  When the replacement support device 1 of the embodiment supports the replacement of the protection relays 3 of a plurality of models, each model of the protection relay 3 has the first and second rule tables, and the existing setting prior to the reading operation is provided. The model of the protective relay 3 is designated and the first and second rule tables are selected.

Through the above processing, the acquired setting information of the existing protective relay 3 is converted into the input format of the setting information of the new protective relay 4 by the format conversion unit 19.
For example, when setting items are defined for each line and a text-format setting file in which fixed-length setting information is written is input to or read from the protective relay 4, the setting information acquired for each item is used as the protective relay. 4 is written in the corresponding line of the setting file.

The setting information converted by the format conversion unit 19 is transferred to the newly installed protective relay 4 via the setting value output unit 20. More specifically, the setting value output unit 20 of the exchange support apparatus 1 outputs setting information to a communication line such as a serial or a removable medium such as a USB memory. The protective relay 4 reads the setting file via a communication line or a removable medium, and realizes the operation of the same function as the protective relay 3.
As described above, the replacement support device 1 can easily read the setting information of the existing protective relay, and can replace the existing protective relay 3 with the new protective relay 4 instead.

  Although the embodiment of the protective relay has been described above, the present invention is not limited to the protective relay and can be applied to other control devices that can display setting information on the display panel.

  The present invention is not limited to the above-described embodiments, and includes various modifications. The above-described embodiments have been described in detail for easy understanding in the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment.

DESCRIPTION OF SYMBOLS 11 Camera input part 12 Image acquisition part 13 Camera image display part 14 Acquisition image recording part 15 Character recognition part 16 Recognition character string display part 17 Data character string extraction part 18 Extracted character string recording part 19 Format conversion part 20 Setting value output part 21 Operation part

Claims (10)

In the exchange support device that supports maintenance exchange of protective relays,
An image acquisition unit that sequentially acquires screen information of the setting information displayed on the display panel of the existing protective relay in units of screens;
A character recognition unit for recognizing the image of the screen information on a screen basis;
The recognized character strings recognized by the character recognition unit are compared between screens, and when there is a difference in the recognized character strings between screens, the item name and setting contents of the setting information are extracted from the recognized character strings of the screen information. A data string extractor;
A set value output unit for outputting the setting information item name and setting contents to a newly installed protective relay;
A device for supporting replacement of a protective relay, comprising: The exchange support apparatus according to claim 1, further comprising:
A screen information display unit for displaying the screen information;
A recognized character string display unit for displaying the recognized character string,
The data character string extraction unit saves the recognized character string for extracting the character string and the screen information corresponding to the recognized character string when extracting the item name and setting contents of the setting information from the recognized character string of the screen information. Notifying the image acquisition unit and the character recognition unit of a capture instruction to instruct,
The image acquisition unit outputs screen information corresponding to a recognized character string for performing the character string extraction to the screen information display unit based on the capture instruction,
The character recognition unit outputs a recognized character string for performing the character string extraction to the recognized character string display unit based on the capture instruction,
A protection relay replacement support device, wherein the screen information and a recognition character string corresponding to the screen information are displayed in parallel. The exchange support apparatus according to claim 2, further comprising:
Based on the capture instruction, an acquired image recording unit that records screen information corresponding to a recognized character string that performs the character string extraction;
An extracted character string recording unit that records an item name and setting contents of the setting information extracted by the data character string extracting unit;
A device for supporting replacement of a protective relay, comprising: In the exchange assistance apparatus in any one of Claim 1 to 3,
The screen information is information in which characters are two-dimensionally arranged at a fixed pitch,
The device for supporting replacement of a protective relay, wherein the recognized character string has the same character arrangement as the number of characters of the screen information. The exchange support apparatus according to claim 4, further comprising:
A first rule table that records, for each type name, arrangement information of a character string representing a type name of the setting information of the protective relay;
A rule table storage unit that records, for each type of the setting information, the arrangement information of the character string representing the item name of the setting information and the second rule table that records the correspondence between the arrangement information of the character string representing the contents of the setting information And a protective relay replacement support device. The exchange support apparatus according to any one of claims 1 to 5, further comprising:
A protection relay replacement support apparatus, comprising: a format conversion unit that converts the setting information extracted by the data character string extraction unit into a setting information format of a newly installed protection relay. An exchange support method for supporting the migration of setting information during maintenance exchange of a protective relay,
The screen information of the setting information displayed on the display panel of the existing protective relay is obtained sequentially for each screen,
Character recognition of acquired screen information,
Compare the recognized character strings of the setting information between the acquired screens,
When there is a difference in the recognized character string between the acquired screens, the type of setting information is detected from the recognized character string of the screen information, and the item name and setting contents of the setting information are extracted,
A replacement support method, comprising: setting a type of the setting information, the extracted item name, and setting contents in a newly installed protective relay. The exchange support method according to claim 7, further comprising:
The exchange support method, wherein when the recognized character string is different between the acquired screens, the screen information of the setting information and the recognized character string of the setting information are displayed in parallel. An exchange support method for supporting the migration of setting information during maintenance exchange of a protective relay,
A character string representing the type of setting information of the existing protective relay, a character string representing the setting item name for each type, and a character string representing the setting content are displayed with the characters arranged in a grid pattern. Obtain screen information sequentially for each screen,
Character recognition processing is performed on the acquired screen information to obtain a string of screen information,
When there is a difference in the first character string position of the character string of the screen information between the acquired and character-recognized screens, the type of setting information is detected from the character string of the screen information,
When there is a difference in the character string of the second character string position defined for each type of the setting information in the character string of the screen information between the acquired and character-recognized screens, the character string of the screen information Extract setting item name and setting contents from
A replacement support method, wherein the type of the setting information, the extracted setting item name, and the setting content are set in a newly installed protective relay. The exchange support method according to any one of claims 7 to 9,
The exchange support method characterized in that the character recognition of the screen information is limited to characters used for displaying the setting information of the existing protective relay.

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