JPS61288717A - Settling system for digital protective relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a setting method for a protective relay, and particularly to a setting method for a digital protective relay.

[Technical Background of the Invention] In the conventional setting method, when displaying various elements, an address in a storage section is selected using an address switch, and the corresponding data is directly displayed on a display section. When setting, it was common to press a write switch to write the data settled by the data switch to the address of the memory selected by the address switch.
For example, Japanese Patent Application Laid-Open No. 55-129834).

However, in devices that protect and control important systems such as electric power systems, it is necessary to take sufficient measures to prevent erroneous settings caused by careless operations. Conventional protective relays are set using a setting tap, rotary switch, variable resistor, etc., but these measures are not sufficient to prevent erroneous setting due to careless operation. In addition, in recent protection relays that utilize microcomputers, the setting section has been made smaller, making it extremely easy to set multiple elements, but the drawback is that careless operation of a single pushbutton switch can have a major impact on the device. There is.

In addition, as a measure to prevent incorrect setting due to careless operation, the setting section is equipped with a key-operated setting start switch, and when this key is inserted into a predetermined hole and set at a predetermined position,
For the first time, there is a settling system configured so that all setting operations are effective (for example, Japanese Patent Application No. 1985-41585).

FIG. 6 is a configuration diagram of a settling section for explaining a conventional settling method. The numerical value setting section 1 consists of 10 pushbutton switches assigned to numerical values "0" to "9", and the numerical value "0"
- "9" can be set.

The address changeover switch 2 and the data changeover switch 3 are used to select the numerical data A of the numerical value setting section 1. By pressing the address changeover switch 2, the numerical data setting section 1
The numerical data A set in is stored in the storage unit 5 via the selection unit 4.
On the other hand, by pressing the data changeover switch 3, the numerical data A set in the numerical setting section 1 is held as the setting data C of the control section 6 via the selection section 4. Species control.

When the settling start switch 7 is pressed, the control unit 6
Depending on the presence or absence of the output setting permission signal, the storage section data E in the storage section 5 and the setting data C in the selection section 4 are selected and output to the display section 9. When the settling start switch 7 is not pressed, the storage data E in the storage section 5 corresponding to the address specified by the address changeover switch 2 is displayed on the display section 9; When I'm there,
The setting data C of the selection section 4 is displayed on the display section 9.

The write switch 8 writes the setting data C set by the numerical value setting part 1 and the data changeover switch 3 to the address of the storage part 5 specified by the numerical value setting part 1 and the address changeover switch 2.
It is for writing, and consists of a push button switch.

The setting permission switch 11 controls the write command signal F of the write switch 8, and is composed of a key switch.

As shown in FIG. 7, this setting permission switch 11 turns on the setting permission signal G only when the key 12 is inserted into the hole in the first position a and set to the second position. ”. Furthermore, writing of all setting data becomes effective only when this setting permission signal G is in the "on" state. Therefore, if the key 12 is not inserted or set to said second position, the settling permission signal G will be in the "off"state;
All settling data is not written.

Therefore, the key 12 is in the first position of the setting permission switch 11 [
By inserting it into the hole in the state a, setting it to the second digit 1b, and pressing the write switch 8, the write command signal F is inputted to the storage unit 5 as a write signal H via the control unit 6, and this Setting data C set by the result value setting unit 1 and the data changeover switch 3 is written to the storage unit 5 via the control unit 6 and stored.

By pressing the setting start switch 7, the setting data C set in the numerical value setting section 1 is displayed on the display section 9, and by releasing the setting start switch 7, the memory corresponding to the address specified in the numerical value setting section 1 is displayed. The storage unit data E of section 5 is
Since it is displayed on the display unit 9, it is possible to check whether writing has been performed by checking whether the values are the same.

The setting data written in the storage unit 5 is written by the central processing unit 10 and used as setting data in arithmetic processing. Further, FIG. 8 shows an example of the structure of a conventional setting panel.

[Problems with Background Art] As is clear from the above description, the conventional setting method has the disadvantage that incorrect setting may be performed due to careless operation of the write switch 8, which has a large effect on the device.

Furthermore, in the setting methods shown in FIGS. 6, 7, and 8, a key switch is used to prevent careless operation of the write switch, but if the key is lost, the setting will not be performed. Therefore, key management is required.

Furthermore, if the key is not released due to human error, there is a possibility that erroneous setting may be performed due to careless operation of the write switch.

[Object of the Invention] The present invention has been made to solve the above problems, and provides a setting method for a digital protective relay that can reliably prevent erroneous setting due to careless operation using a simple device. is intended to provide.

[Summary of the Invention] The present invention attempts to prevent erroneous setting due to careless human operations by providing a function to permit setting on the condition that predetermined data is input at the time of starting setting. be.

[Embodiments of the invention] The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a configuration diagram of an embodiment for explaining a setting method of a digital protective relay according to the present invention. In Figure 1,
The same reference numerals as in FIG. 6 correspond to those in FIG. In FIG. 1, the numerical value setting section 1 consists of 10 pushbuttons assigned to numerical values rOJ to "9", and numerical values "0" to
Any one of "9" can be set.

The address changeover switch 2, the data changeover switch 3, and the setting permission number changeover switch 13 are used to select the numerical data A of the numerical value setting section 1. By pressing the address changeover switch 2, the setting in the numerical value setting section 1 can be performed. The output of the numerical data A set in the numerical setting section 1 is held as address B in the storage section 5 via the selection section 4, and by pressing the data changeover switch 3, the numerical data A set in the numerical setting section 1 is transferred to the selection section 4. The output is held as the setting data C of the control unit 6 through the control unit 6, and by further pressing the setting permission number changeover switch 13, the numerical data A set in the numerical value setting unit 1 is held.
The selection unit 4 controls the output of the central processing unit 10 to be held as the setting permission number data (2).

The control unit 6 selects the setting data E in the storage unit 5 and the setting data C in the selection unit 4 depending on the presence or absence of a setting permission signal output when the setting start switch 7 is pressed, and displays the setting data on the display unit 9.
Output to.

When the setting start switch 7 is not pressed, the memory section 5 corresponding to the address specified by the address changeover switch 2
The storage unit data E of is displayed on the display unit 9. On the other hand, when the setting start switch 7 is pressed, the setting data C of the selection unit 4 is displayed on the display unit 9.

The write switch 8 writes the setting data C set by the numerical value setting part 1 and the data changeover switch 3 to the address of the storage part 5 specified by the numerical value setting part 1 and the address changeover switch 2.
It is for writing, and consists of a push button switch.

The setting permission signal G controls the write command signal F of the write switch 8, and is composed of the setting permission number data I taken into the central processing unit 10 and the setting permission number data I stored in the storage unit in the central processing unit 10. Software in the central processing unit 10 determines whether or not the settling permission constants are equal. If they are equal, the settling permission signal G is turned on, and if they are not equal, the settling permission signal G is turned off.

The control section 6 outputs the write signal H to the storage section 5 only when the setting permission signal G is "on" and the write command signal F is "on".

FIG. 2 is a flowchart for explaining the software.

Here, at the same time as setting starts, by pressing the setting permission number changeover switch, setting the same value as the setting permission constant in the central processing unit 10 in the numerical value setting section 1, and pressing the write switch 8, the write command signal F is set. Setting data C, which is input to the storage section 5 as a write signal H via the control section 6 and settled by the numerical value setting section 1 and the data changeover switch 3, is written into the storage section 5 via the control section 6 and stored.

By pressing the setting start switch 7, the setting data C set in the numerical value setting section 1 is displayed on the display section 9, and by releasing the setting start switch 7, the memory corresponding to the address specified in the numerical value setting section 1 is displayed. Since the storage unit data E of the unit 5 is displayed on the display unit 9, it is possible to confirm whether writing has been performed by checking whether or not the values are the same.

The setting data written in the storage unit 5 is stored in the central processing unit 10.
It is written within and used as setting data for calculation processing.

FIG. 3 is a structural diagram of the settling panel of FIG. 1.

As shown in the figure, a settling permission number changeover switch 13 is mounted in place of the settling permission switch 11 of the conventional example.

As explained above, according to the configuration shown in FIG. 1, it is possible to prevent erroneous setting due to careless operation of the write switch or the like.

Furthermore, if you use a key to prevent accidental operation, there is a possibility that the setting will not be performed due to the key being lost, but in the present invention, you only need to input the setting permission number
There is no fear of loss.

FIG. 4 is a block diagram showing another embodiment of the present invention. Fourth
In the figure, the same symbols as in FIG. 1 correspond to those in FIG. 1.

In FIG. 1, the setting permission constant stored in the storage unit in the central processing unit 10 is compared with the setting permission data, whereas in FIG. 4, the setting permission constant setting switch 14 is The only difference is that the data is input into the data and compared with the settling permission data, and the other configurations are the same.

With the configuration shown in FIG. 4, the setting value of the setting permission constant setting switch 14 can be changed to change the setting permission number.

Furthermore, if you forget the setting permission number, you can check the setting permission number by reading the setting value of the setting permission constant setting switch 14.

FIG. 5 is a flowchart for explaining the software of the settling method according to the present invention.

In Figure 2, the settling permission data and the settling permission constant in the central processing unit are compared, whereas in the flowchart in Figure 5, the sum of the first settling permission data and the second settling permission data is constant. The only difference is that it compares whether it is a value or not, and the other processing contents are the same.

By adopting the configuration as shown in FIG. 5, the sum of the first settling permission number and the second settling permission number need only be a constant value, so that the degree of freedom in the settling permission number can be increased.

Note that the arrangement of "0" to "9" in the numerical value setting section 1 is not limited to that shown in the figure. Also, the numerical value setting section 1 is 10
It is not limited to 16 pushbutton switches.
It may be a single pushbutton switch or a three-digit digital switch.

Note that the circuit configuration described above is not limited to the embodiment described above, and for example, the comparison between the settling permission data and the settling permission constant may be configured using hardware.

Furthermore, if the settling permission data and the settling permission constant do not match, processing such as issuing an alarm may be performed.

Of course, various changes can be made without changing the gist of the invention.

[Effects of the Invention] As explained above, according to the present invention, since a key etc. for preventing operation is not used, there is no fear that the setting will become impossible even if a key etc. is lost, and there is no possibility of inadvertent activation of a write switch etc. We can provide a setting method for digital protective relays that can prevent incorrect settings due to operation.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an embodiment for explaining the setting method of a digital protective relay according to the present invention, FIG. 2 is a flowchart explaining the processing content of FIG. 1, and FIG. 3 is an example of the embodiment of FIG. 1. FIG. 4 is a configuration diagram of another embodiment, FIG. 5 is a flowchart explaining the processing content of FIG. 4, and FIG. 6 is a configuration diagram explaining a conventional settling method.
FIG. 7 is a diagram illustrating the structure and operation of a settling permission switch, and FIG. 8 is a structural diagram of a conventional settling panel. DESCRIPTION OF SYMBOLS 1... Numeric value setting part 2... Address changeover switch 3... Data changeover switch 4... Selection part 5... Storage part 6... Control part 7... Setting start switch 8... Write switch 9...Display section 10...Central processing unit
11...Setting permission switch 12...Key 13...Setting permission number changeover switch 14...Setting permission constant setting switch (7317) Agent Patent attorney Norichika Kensuke (and 1 other person) See 1 illustration Figure 2 Figure 3 Figure 4 Squirrel Figure 5 Child Figure 6

Claims (1)

[Claims] a storage unit; first means for selecting an address of the storage unit;
A digital protective relay comprising: second means for setting data in a storage section; and third means for writing data settled by the second means to an address in the storage section selected by the first means. In the setting method, the third means sets one or more data for write permission, and also determines whether the one or more data set by the third means is a predetermined value. , and when one or more data set by the third means is a predetermined value, a second A method for setting a digital protective relay, characterized in that data set by a method is written.