JP2011176924A - Digital protective relay device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent bad settings due to a human careless mistake, facilitate work for checking, and shorten work time, when manually setting a plurality of communication addresses allotted to each board in a digital protective relay device. <P>SOLUTION: The digital protective relay device includes a plurality of arithmetic and control boards which mount a protective arithmetic and control means for controlling the operation by using values input in analog from a power system, a plurality of input-output boards which mount an input-output means for fetching state information from a power system apparatus or giving an operation output to the power system apparatus, and a serial communication means which is provided between the plurality of input output boards and the plurality of arithmetic and control boards. The input-output boards are arranged side by side in the same direction, and the serial communication means includes a plurality of serial communication systems. In the digital protective relay device, the input-output boards are provided with an address deciding means which decide addresses separately for a plurality of serial communication systems, and the mounting positions of the address deciding means are provided separately for a plurality of serial communication systems, in a direction crossing the direction of arrangement of the plurality of input output boards. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a digital protection relay device that protects and controls a power system, and more particularly to a digital protection relay device that is devised for setting and mounting arrangement when data communication is performed between boards in the device.

  The digital protection relay device that protects and controls the power system is functionally composed of an analog input unit, digital protection arithmetic processing unit, settling unit, output unit, etc. It is mounted on. The signals handled in the digital protection relay device include analog signals and digital signals.

  Among these, an analog input unit is a circuit part that handles analog signals. The analog input section is usually composed of a single board, which is equipped with a digital signal processing device equipped with an analog filter for preventing folding error, a sampling hold circuit, a multiplexer, an A / D converter, and a buffer. Yes. The circuit parts other than the analog input part are circuit parts that handle digital signals.

  The digital protection arithmetic processing unit, which is the center of the digital protection relay device, is usually composed of a plurality of boards, and takes in the signal of the power system converted into a digital signal from the analog input unit and executes the protective relay operation. The digital protection arithmetic processing unit is coupled to another board via a system bus, and drives the system bus to transfer data to various input / output boards and arithmetic boards connected to the system bus, data monitoring, etc. Execute the process.

  In order to control the system bus, the digital protection arithmetic processing unit generally sends a desired address signal from the internal CPU to the system bus, and the self-board is accessed in various input / output boards connected to the system bus. And input / output data.

  In order to perform the data communication using the system bus, in Non-Patent Document 1, each input / output board connected to the system bus is assigned an address on the memory map of the internal CPU of the digital protection arithmetic processing unit. Yes. In this address assignment work, when the digital protective relay device is manufactured, the operator manually sets the address value on each input / output board.

  As a result, if the address setting for the input / output board is mistaken during this operation, the CPU of the digital protection arithmetic processing unit cannot receive the response of the accessed board, resulting in a problem that input / output processing cannot be performed.

  Furthermore, since it is not possible to specify a board having a wrong address setting among a plurality of boards connected, it takes a lot of time for recovery work. In addition, when manually setting addresses assigned to each board on multiple I / O boards, a setting failure occurs due to human careless mistakes, so a lot of labor is spent on work time such as setting confirmation. It was done.

  Thus, for the purpose of reducing the burden on the operator at the time of manufacturing the digital protective relay device and performing reliable address setting, Patent Document 1 discloses a circuit in which an address matching circuit, a control circuit, and a board type are coded. When the board is inserted, the CPU of the control device accesses the board with the specified address, and when the address matches, the board outputs the code to the bus to identify the board. is doing.

  Further, in Patent Document 2, the slot number setting circuit is provided on the backboard side into which a plurality of boards are inserted, the address of the insertion board is determined, and the identification ID is transferred from each insertion board to the system bus. The CPU of the device identifies the substrate.

JP-A-6-180680 JP-A-2005-84825

"Electrical Cooperative Research" Vol. 50, No. 1

  On the other hand, in recent years, in the data input / output between the CPU of the control device and each input / output board, the number of wires has been reduced by serial connection serial communication instead of the parallel connection system bus described above. However, it is necessary to set the board identification address in serial communication as well.

  However, the above-mentioned conventional technology cannot be applied to serial communication as it is, and after all, address setting assigned to each board is manually performed, but a setting failure occurs due to human careless mistakes. Therefore, a lot of labor is spent on work time such as confirmation of settings.

  Furthermore, serial communication enables data input / output with less wiring, but each input / output board can perform data input / output by multiple serial communication systems between multiple control devices and CPUs. Address setting is required for each of a plurality of serial communication systems, and manual address setting is further complicated and difficult.

  In view of the above, the object of the present invention is to easily and reliably perform a plurality of address setting operations assigned to each board at the time of manufacturing a digital protection relay device that executes serial communication internally, and shortens the operation time. There is.

The present invention provides a plurality of calculation control boards equipped with protection calculation control means for calculating and controlling using an analog input value from a power system, fetching status information from power system equipment, or operating output to power system equipment. A plurality of input / output boards having input / output means mounted thereon and serial communication means provided between the plurality of input / output boards and the plurality of operation control boards, and the input / output boards are arranged in the same direction. The serial communication means is a digital protective relay including a plurality of serial communication systems.
Address determining means for determining addresses for a plurality of serial communication systems is provided on the input / output board, and the mounting position of the address determining means is provided for each of the plurality of serial communication systems in a direction intersecting with the arrangement direction of the plurality of input / output boards. .

  Further, it is preferable that regular numbers are sequentially assigned to a plurality of address determination means provided at the same mounting position from one end to the other end of a plurality of input / output boards arranged in parallel.

  The serial communication means and the plurality of address determination means may be provided on different surfaces.

  The address determining means may be color-coded for each serial communication system.

  The present invention includes a main detection calculation control board equipped with a protection calculation control means for performing main detection calculation control using a value analog input from the power system, and protection detection calculation control using a value analog input from the power system. Protection trip calculation control board with protection calculation control means, and multiple trip boards with a circuit that obtains signals from protection detection calculation control board and main detection calculation control board and gives trip signal of power system circuit breaker A plurality of input / output boards having input / output circuits for exchanging input / output signals with the protection detection calculation control board or the main detection calculation control control board, and a serial transmission flat provided between the boards. Each board is arranged in parallel at a predetermined height position on the switchboard, and serial transmission between the main detection calculation control board and the trip board is made at the first height position of the board. The first address setting means for performing the transmission is provided on the trip board, and the second address setting means for performing serial transmission between the protection detection calculation control board and the trip board is provided at the second height position of the board. Input / output third address setting means for serial transmission between the protection detection calculation control board or the main detection calculation control board and the plurality of input / output boards at the third height position of the board provided on the trip board It was provided on the substrate.

  Further, the first, second and third height positions of the substrate should be set to height positions where the visual recognition and operation of the first, second and third address setting means are not hindered by the flat cable. .

  Moreover, it is preferable to provide an identification step at a height position between the first and second height positions of the substrate and the third height position.

  Further, the trip board or the input / output board is arranged at a position apart from the protection detection calculation control board and the main detection calculation control board, and as an address to be set in a plurality of address setting means at a predetermined height position, It is preferable to sequentially assign regular numbers from one end to the other end of the trip board and the input / output board.

  According to the present invention, it is possible to facilitate an address setting operation for data input / output by serial communication of a plurality of systems on each input / output board.

The figure which shows the structure of the panel back surface of a digital protection relay apparatus. The figure which shows the address structure and switch setting example for serial communication from the arithmetic control board 2 of the main detection with respect to several trip board | substrates 4. The figure which shows the address structure and switch setting example for performing serial communication from the calculation control board 3 of protection detection with respect to the some trip board | substrate 4. FIG. The figure which shows the address structure and switch setting example for serial communication from the calculation control board 2 for main detection, and the calculation control board 3 for protection detection to the input / output board 5 and the input exclusive use board 6.

  FIG. 1 is a configuration diagram of the back side of a digital protective relay device according to the present invention. The digital protection relay device Ry is composed of an input converter 1, a calculation control board 2 for main detection, a calculation control board 3 for protection detection, a trip board 4, an input / output board 5, and an input only. The input / output device 20 stores a plurality of substrates 6. There are several types of substrates stored in the input / output device 20, but these are simply referred to as input / output substrates.

  Each board 2-6 in said digital protection relay apparatus Ry is connected by the flat cable 15. FIG. In addition, a flat cable 11 is provided between the boards 1 to 3 inside the control device 10, and an analog value of the power system captured by the input converter 1 is used for main detection via the flat cable 11. It is inputted to the arithmetic control board 2 and the arithmetic control board 3 for protection detection.

  The calculation control board 2 for main detection and the calculation control board 3 for protection detection digitize analog values input from the power system via the input converter 1, respectively, and perform protection relay calculation and control. Digital data communication by serial communication is controlled and executed between the input / output boards 4 to 6 in the input / output device 20 via the flat cable 15. Here, the flat cable 15 is used as the digital data communication transmission line by serial communication, but any other serial communication transmission line may be used.

The flat cable 15 includes the following four systems of serial communication wiring.
A serial communication system A for inputting / outputting data from / to the multiple trip boards 4 from the main detection calculation control board 2
A serial communication system B for inputting / outputting data to / from a plurality of trip boards 4 from the protection control calculation control board 3
A serial communication system C for inputting / outputting data from / to the plurality of input / output boards 5 and the dedicated input board 6 from the main detection calculation control board 2
A serial communication system D for inputting / outputting data to / from the plurality of input / output boards 5 and the input dedicated board 6 from the protection control calculation control board 3
Of the four serial communication systems described above, A and B transmit a circuit breaker trip signal from the boards 2 and 3 to the board 4, so that they are faster than the communication systems C and D. It needs to be said. For this reason, the serial communication systems A and B are sometimes called high-speed lines, and the communication systems C and D are sometimes called general lines.

  Each board 4 to 6 in the input / output device 20 is provided with rotary switches 11 to 13 for setting addresses for serial communication, and the mounting position of the rotary switch 11 on the switchboard is the system. The height position is aligned every time. Here, the rotary switch is an example of an address setting unit, and a daisy switch or the like can be used in addition.

  The rotary switch 11 aligned with the height of the mounting position 21 means a rotary switch for performing address setting of the serial communication system A for inputting / outputting data to / from the plurality of trip boards 4 from the main detection calculation control board 2.

  The rotary switch 12 aligned with the height of the mounting position 22 means a rotary switch for setting the address of the serial communication system B for inputting / outputting data to / from a plurality of trip boards 4 from the arithmetic control board 3 for protection detection. .

  The rotary switch 13 aligned with the height of the mounting position 23 inputs / outputs data from / to the plurality of input / output boards 5 and the input dedicated board 6 from the main detection calculation control board 2 and the protection detection calculation control board 3. This means a rotary switch that is used in common for two systems (C, D) for serial communication to set addresses.

  In the present invention, the rotary switches 11, 12, and 13 are arranged at the height positions 21, 22, and 23 in FIG. 2, but the rotary switches 11 and 12 at the upper two height positions are for high-speed lines. The rotary switch 13 at position 23 is for a general line. In the present invention, the identification stage 24 is provided in the intermediate stage (between the height positions 22 and 23) of the rotary switch of the high-speed line and the general line to further clarify the difference between the two lines. The identification stage 24 may be a simple delimiter, but may be a check terminal 14 for confirming the setting content of the rotary switch. By providing the identification stage, it is possible to make the difference between the types of lines conspicuous, so that an error in setting an address can be prevented.

  Furthermore, in the present invention, for each serial communication system, the rotary switches 11, 12, 13 at the mounting positions aligned at the height positions 21, 22, 23 are set to 0, 1, An address that is simply changed by +1, such as 2, is set. In this way, by simplifying the address and making it a rule number, the settling operation can be facilitated and errors can be made difficult. That is, one address is easier to identify than a large number of addresses, and because it is regularized, it has the effect of easily recognizing an error with no regularity.

  As described above, the height mounting positions of the rotary switches of the respective boards 4 to 6 are aligned for each serial communication system, and by manually setting the addresses changed by +1 from the left side or the right side so that the addresses do not overlap, manual operation is performed. The address setting of a plurality of serial communication systems due to is not mistaken.

  In the example of FIG. 1, the rotary switches 11 to 13 are arranged on the upper end of the flat cable 15 and mounted on the end of the board that can be seen from the outside, so that the address setting value can be set without being removed from the input / output device 20. I can confirm. Similarly, the address setting operation can be performed without removing it from the input / output device 20.

  FIG. 2 shows an address configuration and switch setting examples for serial communication from the main detection calculation control board 2 to the plurality of trip boards 4. An address memory AM2 is provided in the arithmetic control board 2 for main detection. The address memory AM2 stores an address AD, data DT, and switch setting ST as a set.

  The CPU (not shown) in the arithmetic control board 2 for main detection has a total of 16 address settings, for example, 10 from 0 to 9 and 6 from A to F as the address AD of the address memory AM2. Is possible. Of these, the data area DT corresponding to addresses 0 to 7 is used for reading input data, and the data area DT corresponding to 8 to F is used for writing output data. Input / output data control by serial communication is possible.

  The plurality of trip boards 4 sets the rotary switch 11 at the position 21 aligned for each system as 0, 1, and 2 from the left board. This is realized by sequentially setting the switch setting ST column of the address memory AM2 to 0, 1, and 2. For example, the input data from the trip board 4-1 for which the address 0 is set by the rotary switch 11-1 is reflected in the input data area of the address 0, and the CPU inside the main detection arithmetic control board 2 inputs the address 0. By reading the data, the input data from the trip board 4-1 is known.

  In the case of data output, the CPU in the main detection calculation control board 2 writes the output data to the trip board 4-1 to which the address 0 is set at the address 8. The trip board 4-1 takes in the data written in the address 8 obtained by adding 8 to the value set by the rotary switch 11-1 as the output of the arithmetic control board 2.

  Similarly, data can be exchanged with other trip boards 4-2. The input data of the trip board 4-2 for which the address 1 is set by the rotary switch 11-2 is reflected in the data area of the address 1, and the CPU in the main detection calculation control board 2 reads the data of the address 1, The input data of the trip board 4-2 is known.

  In the case of data output, the CPU in the main detection calculation control board 2 writes the output data to the trip board 4-2 to which the address 1 is set at the address 9. The trip board 4-2 takes in the data written in the address 9 obtained by adding 8 to the value set in the address 1 by the rotary switch 11-2 as an output. In data output, the value added to the address set by the rotary switch is the maximum number of trip boards 8 that can be connected to serial communication.

  As described above, by setting the serial communication address of the trip board 4 in increments of +1 in order by the rotary switch 11, the main detection calculation control board 2 can input / output data of a plurality of trip boards 4.

  Since the digital protective relay Ry has a configuration in which trip control is duplicated by the main detection calculation control board 2 and the protection detection calculation control board 3, serial communication to the trip board 4 is also duplicated. 2 and 22 are distinguished from each other. However, the address configuration and switch setting for serial communication from the protection control calculation control board 3 to the plurality of trip boards 4 can be performed in the same manner as in the example of FIG. That's fine.

  FIG. 3 shows an address configuration and a switch setting example for serial communication from the arithmetic control board 3 for protection detection to a plurality of trip boards 4. The protection detection calculation control board 3 includes an address memory AM3. The address memory AM3 has an address AD, data DT, and switch setting ST, as in the address memory AM2 of FIG. Since they are stored in pairs and their use is the same as that of the address memory AM2, description thereof is omitted here. FIG. 3 differs from FIG. 2 in that the calculation control board is the protection control calculation control board 3 and the mounting height position is 22 as shown in FIG. The point is 12.

  FIG. 4 shows an address configuration and switch setting example for serial communication from the main detection calculation control board 2 and the protection detection calculation control board 3 to the input / output board 5 and the input dedicated board 6. An address memory AM23 is provided inside either the arithmetic control board 2 or 3, but the address memory AM32 is similar to the address memory AM2 in FIG. 2 or the address memory AM3 in FIG. The data DT and the switch setting ST are stored as a set.

  In this case, serial communication has two systems under the control of the main detection calculation control board 2 and the protection detection calculation control board 3, but the address set value is set by one rotary switch 13 at the mounting position 23. Sharing.

  The CPU (not shown) inside the arithmetic control board 2 for main detection and the arithmetic control board 3 for protection detection has, for example, 10 addresses 0 to 9 and A to F as the address AD of the address memory AM23. 16 address settings in total, 10 addresses from 10 to 19, and 16 address settings in total from 1A to 1F, a total of 32 address settings are possible. . Of these, the data area DT corresponding to addresses 0 to F is used for reading input data, and the data area DT corresponding to addresses 10 to 1F is used for writing output data. 5 or input / output data control by serial communication of the input-only substrate 6 is possible.

  The plurality of input / output boards 5 and the input-only boards 6 sequentially set the rotary switch 13 at the position 23 arranged for each system as 0, 1, 2 from the left board. This is realized by sequentially setting the switch setting ST column of the address memory AM23 to 0, 1, and 2. For example, the input data of the input / output board 5-1 for which the address 0 is set by the rotary switch 13-1 is reflected in the data area of the address 0, and the main detection calculation control board 2 and the protection detection calculation control board 3. An internal CPU (not shown) can read the input data of the input / output board 5-1 by reading the data of the address 0.

  When data is output from the main detection calculation control board 2 and the protection detection calculation control board 3, the CPUs of the main detection calculation control board 2 and the protection detection calculation control board 3 set the address 0. Output data to the output board 5-1 is written to the address 10. The input / output board 5-1 reads the data written in the address 10 obtained by adding 10 from the value set by the rotary switch 13-1 and the arithmetic control board 2 for main detection and the arithmetic control board 3 for protection detection. Can be captured internally as output from. This operation is similarly performed in the case of the input / output board 5-2 in which the address 3 is set by the rotary switch 13-4.

  In the case of the input-only board 6-1 or 6-2 in which the address 1 or 2 is set by the rotary switch 13-2 or 13-3, it is slightly different. When the input is taken into the main detection calculation control board 2 and the protection detection calculation control board 3, the operation is performed with the same concept, but the main detection calculation control board 2 and the protection detection calculation control board. In the case of outputting from 3, since there is no output on the input dedicated board 6, the address 11 or 12 obtained by adding 10 to the value 1 or 2 set by the rotary switch 13-2 or 13-3 is unused and empty. It is considered as an area.

  In the data output, the value added to the address set by the rotary switch 13 is set to 10 in hexadecimal notation because the maximum number of boards of the input / output board 5 and the input dedicated board 6 that can be connected to serial communication is 16.

  Note that when a plurality of boards are assembled, it is easy to perform work if switches for determining addresses for a plurality of serial communications are color-coded for each serial communication system. For example, the rotary switch 11 installed at the mounting position 21 in FIG. 2 is yellow, the rotary switch 12 installed at the mounting position 22 in FIG. 3 is blue, and the rotary switch 13 installed at the mounting position 23 in FIG. 4 is green. It is.

  As described above, by setting the serial communication addresses of the input / output board 5 and the input-only board 6 in increments of +1 in turn using the rotary switch, the calculation control board 2 for main detection and the calculation control board 2 for protection detection are Data can be input / output between the plurality of input / output boards 5 and the input-only board 6.

  According to the present invention, since the address setting between the substrates of the digital protection relay device can be reliably performed with a simple operation, the present invention can be widely applied.

1: Input converter 2: Main detection calculation control board 3: Protection detection calculation control board 4: Trip board 5: Input / output board 6: Input dedicated board 10: Controllers 11, 12, 13: Rotary switch 14: Check terminal 20 : Input / output device 11, 15: Flat cable 21: Trip board rotary switch mounting position (for main detection)
22: Trip board rotary switch mounting position (for protection detection)
23: Rotary switch mounting position on I / O board and input-only board (shared with main detection and protection detection)
24: Identification stages A, B, C, D: Serial communication system

Claims (8)

A plurality of operation control boards equipped with protection operation control means that performs operation control using analog input values from the power system, and input / output that captures status information from the power system equipment or provides operation output to the power system equipment A plurality of input / output boards mounted with the means, and serial communication means provided between the plurality of input / output boards and the plurality of operation control boards, wherein the input / output boards are arranged in the same first direction. In the digital protection relay device, wherein the serial communication means includes a plurality of serial communication systems,
Address determining means for determining an address for each of the plurality of serial communication systems is provided on the input / output board, and a mounting position of the address determining means is a second direction that intersects a first direction that is an arrangement direction of the plurality of input / output boards. A digital protection relay device provided in the direction for each of the plurality of serial communication systems. The digital protection relay device according to claim 1,
A digital number that sequentially assigns a regular number to a plurality of address determination means provided at the same mounting position in the second direction from one end to the other end of a plurality of input / output boards arranged in parallel Protective relay device.   3. The digital protection relay device according to claim 1, wherein the serial communication unit and the plurality of address determination units are provided on different planes, and the plurality of address determinations from the outside. A digital protective relay device characterized in that the means can be operated. In the digital protection relay device according to any one of claims 1, 2 and 3,
The digital protection relay device, wherein the address determination means is color-coded for each serial communication system.   Main detection calculation control board having protection calculation control means for performing main detection calculation control using analog input values from power system, and protection calculation control means for protection detection calculation control using values analog input from power system A plurality of trip boards equipped with a circuit for obtaining a signal from the protection detection calculation control board and the main detection calculation control board and providing a trip signal for the circuit breaker of the power system; , A plurality of input / output boards having input / output circuits for exchanging input / output signals with the protection detection calculation control board or the main detection calculation control board, and a serial transmission board provided between the boards. Each board is arranged in parallel at a predetermined height position on the switchboard, and the main detection calculation control board and the trip board are arranged at a first height position of the board. The trip board is provided with first address setting means for performing serial transmission between the protection detection calculation control board and the trip board at a second height position of the board. A second address setting means is provided on the trip board, and serial transmission between the protection detection calculation control board or the main detection calculation control board and the plurality of input / output boards is performed at a third height position of the board. A digital protective relay device, characterized in that a third address setting means is provided on the input / output board. In the digital protective relay device according to item 5,
The first, second, and third height positions of the substrate are height positions that do not hinder the visual recognition and operation of the first, second, and third address setting means by the flat cable. Digital protective relay device. In the digital protective relay device according to item 5,
A digital protective relay device, characterized in that an identification stage is provided at a height position between the first and second height positions of the substrate and the third height position. In the digital protective relay device according to item 5,
The trip board or the input / output board is arranged at a position where the protection detection calculation control board and the main detection calculation control board are separated from each other, and addresses set in a plurality of address setting means at predetermined height positions The digital protection relay device is characterized by sequentially assigning regular numbers from one end to the other end of the trip board and the input / output board.

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