JPH11355952A - Digital protective relay system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital protective relay system which can facilitate the transfer and check of setting data, and setting operation. SOLUTION: This personal computer sets all setting values of setting items by one operation (S3-S19), sends all of them to the data storage area of a protective relay device (S20), checks sending and receiving data based on comparison between all sent setting value data and all setting value data returned from the data storage area (S10A), and writes the setting value data stored in the data storage area to a nonvolatile memory when the check is normal (S24). This system also includes checking the absolute value and relative value of the setting value using the personal computer (S8, S21) and filing current setting value data read from the protective relay device and preset new setting value data on a storage medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital protection relay system, and more particularly to a settling method for setting a set value on a personal computer and transferring the set value to the protection relay device.

[0002]

2. Description of the Related Art A digital protection relay is configured as a computer, and takes in current and voltage information inside and outside a protection target section of a power system by sampling, and compares these measurement information with a set value and measurement information. By comparing the result calculated based on the above with the set value, the presence or absence of an accident in the section to be protected or the like is detected, and in the event of an accident, a trip (trip) signal of a circuit breaker provided in the section to be protected is generated to generate a signal. To protect.

In such a digital protection relay device, the set value is set in advance. FIG. 4 shows a method of setting the set value. The personal computer 1 is connected to the protective relay device 2 as a human interface, a setting screen is displayed on the display device 1A of the personal computer 1, and the setter sets a numerical value for each setting item using a mouse, a keyboard, and a numeric keypad screen. The system configuration is such that the set value is transferred and written to the nonvolatile memory of the protection relay device 2.

FIG. 5 shows a settling operation processing procedure in this settling method, which is a case of setting in units of pages. The same applies to a case of setting elements.

[0005] First, the personal computer 1 is started, and "settling" is clicked on the main menu screen (S1), and the current operating set value already recorded in the protection relay device 2 is set to "new setting value", "new setting value" of the personal computer. The current setting value and the “initial value” are read into the data storage area (S2), “setting menu item” is clicked on the sub menu screen for setting (S3), and “start setting” is clicked on the leaf screen (S4).

At the start of setting, selection of "setting element", setting of set value by "numeric keypad" and input of one setting element by clicking "input" are performed (S5), and when this input is completed for one page ( S6) Click "Page Write" to transmit page-by-page data to the protection relay device side (S6).
7).

[0007] For each set value written on the page, the protection relay side checks whether the absolute value is correct and returns it to the personal computer side, and checks whether the absolute value check is normal from the returned data. If there is an abnormal value (S8), an "absolute value failure message" is displayed and the process returns to the setting again (S9).

If there is no error in the absolute value, the settling data for the page is transferred to the protection relay device side, and transmission / reception data check (transmission-related check) is performed by comparing the transfer data with return data from the protection relay device. (S10) If it is abnormal, an error message is displayed (S11), and it is waited whether to retry page writing for this display (S1).
2) If the retry is not performed, the screen returns to the leaf screen by the "settling stop" process (S13). If the retry is performed, the process returns to the click of "page write".

When the transmission / reception data check is normal,
The written elements are displayed in color (S14), and it is checked whether or not the page setting of the set value is completed for all pages (S15). If not completed, click "next page" to return to settling of the next page (S15).
16). When the setting of all pages is completed, when "return to setting menu" is clicked (S17), the screen returns to the "setting" submenu screen and the written menu items are colored and displayed (S18).

From this colored display, it is checked whether or not all of the written menu items have been completed. If not, the process returns to the "settling" submenu and the remaining menu items are settled (S19).

When all of the menu items are completed, an instruction is issued to execute "operation start" by the protection relay device using the settled set value (S20), and at the start of operation, the relative value of the set value is changed to the protection relay device. The relative value is checked by returning the checked value (S21), and if the relative value is not correct, the message is displayed and the process returns to the resetting (S22).
The relative value check is to determine the magnitude of a plurality of settling elements in the protection relay device. For example, the check condition is that the setting of one stage of the impedance relay element is smaller than two stages.

When the relative value check is normal, the protection relay device writes and updates the transferred settling data in the nonvolatile memory, and the personal computer releases the colored display of the written menu item and performs the settling operation. Finish (S2
3).

[0013]

FIG. 6 shows a processing procedure for transferring setting data in page units from the personal computer 1 to the protection relay device 2 in the conventional setting method.

When the writing of the set data in page units on the screen of the personal computer 1 is completed, in step S10, the data is transmitted to the protection relay device 2 side as the equivalent page data, and the protection relay device 2 stores the data in the data storage area. The transmission / reception data is checked by temporarily storing the data and reading the stored data to the personal computer 1.
Then, when “operation start” is executed in step S20, the protection relay device 2 checks the relative values of all the page data stored in the data storage area, and then writes the data in the non-volatile memory, and writes the new settling data. Start operation using.

Therefore, in the conventional settling method, the settling data is divided into page units, transferred to the protection relay device in page units, and returned in page units from the protection relay device. Since data is exchanged with the relay device in units of pages, the transfer efficiency is low, and it takes time to settle.

In particular, if an abnormality occurs in the relative value check in step S21, the setting is re-performed on a page-by-page basis, and the transfer and the reply on a page-by-page basis are performed for all the pages, which further complicates the setting operation.

An object of the present invention is to provide a digital protection relay system in which the transfer and checking of set data is simplified and the settling operation is also simplified.

[0018]

According to the present invention, in order to solve the above-mentioned problems, the setting operation of the set value and the transmission / reception data check are collectively processed for all the set values, and then the entire data storage area of the protection relay device is set. The setting value data is written in the non-volatile memory, and is characterized by the following configuration.

A setting value setting operation screen is displayed on the personal computer, the value of each setting item is set and operated according to the screen, and the set value thus set is transferred to the protection relay device and stored in its nonvolatile memory. In the digital protection relay system, the personal computer includes: setting operation means for collectively performing setting operation for all set values of the setting items; and data of the protection relay device after the setting operation is completed by the setting operation means. Transmission means for transmitting the data to the storage area in a batch, transmission / reception data check means for checking by comparing all the set value data transmitted by the transmission means with all the set value data returned from the data storage area,
And a write command means for generating a command to write the set value data stored in the data storage area to the nonvolatile memory when the check by the check means is normal.

Further, the personal computer has means for checking the absolute value check of the set value and the relative value check of the set value in the setting of the set value by comparing with the current set value read in advance from the protection relay device. It is characterized by having.

Further, the personal computer is characterized in that it comprises means for storing the current set value data read from the protection relay device and the new set value data subjected to the setting operation in a file on a recording medium.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a settling operation processing procedure according to an embodiment of the present invention.

In the present embodiment, the writing of the set value in page units is completed (S7), the absolute value is checked by the personal computer itself (S8A), and the set data is transferred to the protection relay device (S10). First, write the set values for all pages, and save these as "new set values" in the personal computer.

Then, the transfer of the new set value is performed by "start operation".
Is performed after the relative value check (S21) is passed in the execution (S20). The protection relay writes the new set value transferred to the data storage area and, at the same time, sends back the written data to the personal computer, and the personal computer checks transmission / reception data by comparing the return data with the transfer data ( S1
0A). If an error occurs in the data check, an error message is displayed and the process returns to the resetting (S11).
A).

When no error has occurred, a command to write the transfer data to the nonvolatile memory is issued to the protection relay (S24), and the new set value of the data storage area is written to the nonvolatile memory.

The exchange between the personal computer and the protective relay device according to the present embodiment is as shown in FIG. 2. After setting the set values of all pages by the personal computer 1, the "operation start" is executed (S2).
In step 0), all the set values are transmitted to the data storage area in the protection relay device 2, and the protection relay device returns the stored data to the personal computer 1. When the relative value and the transmission / reception data check are normal, the personal computer 1 A write command to the memory is generated, and the protection relay device 2 writes the data in the data storage area to the nonvolatile memory.

Therefore, in this embodiment, in the exchange of the settling data, all the settling values are sent and returned in a lump, and the data check is also made in a lump, so that the transmission efficiency can be improved.

Conventionally, the relative value check is performed at the start of operation. At this time, transmission and transmission / reception check to the protection relay device side have already been performed by page writing operation.
In the case of a poor check, transmission and transmission / reception check are performed again, resulting in poor processing efficiency. On the other hand, in the present embodiment, since the transmission to the device is performed after the relative value check is performed at the start of operation, only the transmission-related check called transmission / reception check is performed after the transmission. Can be enhanced.

The relative value check can be performed by the personal computer 1 together with the absolute value check, instead of being performed by the protection relay device. This check uses the fact that the current set value has been read from the protective relay device 2 to the personal computer 1 by the process S2, and compares the new set value set by the personal computer 1 with the current set value. Value check can be performed. By the absolute value check and the relative value check by the personal computer 1 itself, the personal computer 1 is a simple check in which data transmission processing with the protection relay device 2 is omitted, and the protection relay device 2 reduces the data transmission / reception load. be able to.

Further, in this embodiment, in order to collectively manage the set values and their checks on the personal computer, in addition to inputting the values from the set screen, the following additional functions are provided as shown in FIG. It is possible to manage the set value by a file linked with the function of the personal computer and to link with another system.

(A) Data and programs containing the set values and check methods read from the protection relay device are stored as files on a recording medium such as a floppy disk, and can be copied and carried.

(B) The data of the above file is read out as a window on the settling operation screen, and the contents of the nonvolatile memory of the protection relay can be updated by using this data by "start operation" in the same manner as in the normal settling operation. To

(C) Reading the file of the setting value from the setting management system that manages the setting value, and enabling the content of the nonvolatile memory to be updated for each protection relay device.

[0034]

As described above, according to the present invention, after the set value setting operation and transmission / reception data check are collectively processed for all the set values, all the set value data in the data storage area of the protection relay device is stored in a nonvolatile manner. Since the data is written to the memory, batch transfer and batch transmission / reception data check of all set data can be performed, so that transfer and check of the set data are easy, and setting operation of set value is also batch setting operation and set operation is easy. Become.

Further, by checking the data of the absolute value and the relative value on the personal computer side, the exchange between the protective relay device and the personal computer is further simplified. Further, by making data and the like into a file, the system expandability is effective.

[Brief description of the drawings]

FIG. 1 is a settling operation processing procedure showing an embodiment of the present invention.

FIG. 2 shows exchange of setting data in the embodiment.

FIG. 3 is an example of a system configuration according to the present invention.

FIG. 4 shows an example of a setting device.

FIG. 5 shows a conventional settling operation processing procedure.

FIG. 6 shows a conventional exchange of settling data.

[Explanation of symbols]

 1. Personal computer 1A Display 2. Protection relay

Claims (3)

[Claims] 1. A setting value setting operation screen is displayed on a personal computer, the value of each setting item is set and operated according to this screen, and the setting value thus set is transferred to the protection relay device and stored in its nonvolatile memory. In the digital type protection relay system for saving, the personal computer includes: setting operation means for collectively performing setting operation for all set values of setting items; and the protection relay device after the setting operation is completed by the setting operation means. Transmitting means for transmitting data to the data storage area in a lump, and transmission / reception data checking means for performing a check by comparing all the set value data transmitted by the transmitting means with all the set value data returned from the data storage area, When the check by the check means is normal, the set value data stored in the data storage area is written to the nonvolatile memory. Digital protective relay system characterized by comprising a write command means for generating a command. 2. The personal computer includes means for checking an absolute value check of the set value and a relative value check of the set value in setting the set value by comparing the set value with a current set value read in advance from the protection relay device. 2. The digital protection relay system according to claim 1, wherein: 3. The personal computer according to claim 1, wherein the personal computer includes means for storing the current set value data read from the protection relay device and the new set value data subjected to the setting operation in a file on a recording medium. 2. A digital protection relay system according to item 1.