JP4584970B2 - Digital protection control device - Google Patents

Description

  The present invention relates to a digital protection control device (hereinafter simply referred to as a protection control device) that performs protection control of a power system, and in particular, includes a machine-side operation unit for an operator to operate the protection control device, and a protection control device. The present invention relates to a protection control device that is compatible with a remote control terminal for remote control.

  Generally, a protection control device detects an accident in a power system such as a transmission / distribution line, bus, transformer, generator, etc., and sends a shutdown command to the circuit breaker to protect the power system. Is housed in a cubicle. In addition, a machine-side operation unit called a human interface unit is provided for an operator to operate the protection control device. The machine-side operation unit displays system state quantity data, displays the contents and time of abnormal phenomena such as accidents, sets relay setting values for protection computation, or simulates the function and operation of protection control devices A machine-side display equipped with operation switches and the like is provided on the cubicle surface.

  In addition, various information of the protection control device is transmitted to a remote terminal such as a personal computer provided at a remote central electric power station via the machine side operation unit, so that even if the operator does not go to the machine side at the time of an accident, Information related to the accident can be confirmed.

  On the other hand, in the protection control device described in Patent Document 1, maintenance for connecting the remote operation terminal to the protection control device is performed so that maintenance such as confirmation and change of various information of the protection control device can be performed from an external remote operation terminal. An adapter has been proposed. The maintenance adapter is connected to a bus that connects the main protection control unit of the protection control device and the machine-side display (display panel and settling panel), and enables transmission of information from the main protection control unit to the remote operation terminal, Information from the remote control terminal and the machine-side display to the main protection control unit can be alternatively transmitted via a changeover switch. In addition, the maintenance adapter simulates the screen information displayed on the machine-side display based on the information transmitted from the main protection control unit to the machine-side display, and the constructed screen information is transferred from the remote operation terminal to the network. A WEB interface for browsing and operating using a browser is provided.

  According to this method, maintenance of the main protection control unit can be performed by the remote operation terminal without changing the programs of the main protection control unit and the machine-side display.

JP 2002-44853 A

  However, since the maintenance adapter described in Patent Document 1 requires a program for simulating the screen information displayed on the machine-side display, for example, a touch-panel machine-side display incorporated in an existing protection control device There is a problem that it cannot be incorporated into the machine-side operation unit having

  The problem to be solved by the present invention is that it can be incorporated into a machine-side operation unit having a machine-side display of a touch panel system incorporated in an existing protection control device, and is protected from both an external operation terminal and a machine-side operation unit. It is to make the control device operable.

  In order to solve the above problems, the present invention provides a protection control unit that executes a protection calculation process based on a system state quantity of an electric power system and outputs a cutoff command to a circuit breaker and the like, and a system output from the protection calculation unit A machine-side operation unit having a display for displaying state quantities and accident information and an operation switch for setting the function and operation of the protection calculation unit, and the machine-side operation unit is connected to the protection calculation unit via a bus A communication control unit that controls communication of a communication network to which an external operation terminal provided outside is connected, a switch interface that switches connection between the machine-side operation unit and the external operation terminal, A digital output interface comprising an entry output interface, a communication control unit, and an arithmetic processing unit for controlling the switch interface are connected via an internal bus. In the control device, the machine-side operation unit includes a connector that connects the external operation terminal on which the web server and the web client are mounted to the internal bus via a communication interface, the machine-side operation unit, and the external operation terminal. Selection means for selecting at least one, and the switch interface connects the Web server to at least one of the communication control unit and the Web client based on the selection by the selection means.

  According to the present invention, the external operation terminal can be connected to the protection calculation unit by switching the selection means and selecting the machine side operation unit or the external operation terminal. Without change, the external operation terminal can have the same function as the machine-side operation unit.

  In particular, since it is not necessary to change the hardware configuration and program of the machine-side operation unit and machine-side operation unit, the protection control device having a machine-side operation unit of, for example, a touch panel type incorporated in an existing protection control device is externally connected. An operation terminal can be incorporated to provide the same function as the machine-side operation unit.

  According to the present invention, for example, it can be incorporated into a machine-side operation unit having a machine-side display of a touch panel type incorporated in an existing protection control apparatus, and the protection control apparatus can be operated from both a remote operation terminal and a machine-side display. Can be.

  Embodiments of the protection control device of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing the overall configuration of an embodiment of a protection control device of the present invention. FIG. 2 is a block diagram showing the concept of the main part of the present embodiment.

  As shown in FIG. 1, a digital protection control device 1 according to this embodiment includes a relay sequence processing CPU board 2 constituting a main protection control unit and a human interface (HI) control CPU board constituting a machine side operation unit. 3, a touch panel type local display 4 constituting the machine-side display, and an external human interface (HI) terminal (portable HI terminal 6 a or remote HI terminal 6 b) 6 which is the local display 4 and an external operation terminal. An HI selection switch 5 as selection means is provided. The local display 4 is not limited to the touch panel type, and may be a method of clicking a display menu or the like by an input means such as a mouse.

  As is well known, the relay sequence processing CPU board 2 includes an input unit that takes in analog data in which system state quantities such as current and voltage of a power system to be protected are detected and performs input processing such as noise removal, and an input unit. After the analog data processed by the above is converted to digital data and filtered, a protection operation unit that executes a predetermined protection operation process, and a block based on the result of the protection operation and the state of the associated power system A sequence processing unit that outputs a shut-off command to a machine or the like is provided.

  The human interface (HI) control CPU board 3 is used to display system state quantities, display the contents and time of abnormal phenomena such as accidents, set relay setpoints for protection calculation processing, or function and operation of the main protection control unit. A mock test is performed. Specifically, as shown in FIG. 1, a central processing unit (CPU) 11, a memory 12 for storing programs and data, an input / output interface 13 for inputting / outputting information to / from the relay sequence processing CPU board 2, a local display 4, a display interface 14 to which 4 is connected, a LAN control unit 15 for controlling communication of a communication network to which an external HI terminal 6 is connected, and a switch interface 16 to which connection conditions are input from the HI selection switch 5 are connected via an internal bus 17. Connected. The CPU 11 controls the memory 12, the input / output interface 13, the display interface 14, the LAN control unit 15, and the switch interface 16. Each interface can be constituted by a serial bus, a parallel bus, or a communication interface.

  The local display 4 is embedded in the front of the cubicle in which the protection control device is housed, and the operator touches the operation switch of the touch panel type local display 4 to switch the display content, set the relay settling value, or It is formed so that a mock test can be executed.

  The HI control CPU board 3 configured as described above inputs various kinds of information from the relay sequence processing CPU board 2 via the input / output interface 13, displays the information on the local display 4 via the CPU 11, and operates the operation switch. The protection control device is controlled in accordance with the command and setting input from.

  With reference to FIG. 2, the conceptual configuration of the HI switching means 20 of the human interface (HI), which is a feature of the present invention, will be described. The external HI terminal 6 is configured using a personal computer. FIG. 2 is an image diagram schematically showing the HI switching unit 20, and the HI switching unit 20 includes a Web server 21, a Web client 22, and an HI selection switch 5. The Web server 21 is connected to the HI selection switch 5 and the relay sequence processing CPU board 2. The Web client 22 is connected to the HI selection switch 5 and the display interface 14. The HI selection switch 5 is connected to the LAN control unit 15. The web server 21 and the web client 22 are mounted on the external HI terminal 6.

  That is, the switch interface 16 is configured to switch the Web server 21 to the LAN control unit 15 or the Web client 22 based on the selection of the HI selection switch 5. Therefore, by switching the HI selection switch 5, when the external HI terminal 6 is selected by the HI selection switch 5, the output of the Web server 21 is connected to the LAN control unit 15. On the other hand, when the local display 4 is selected, the output of the Web server 21 is connected to the Web client 22 via an Ethernet (registered trademark) I / F (not shown), and the output of the Web client 22 is connected to the display interface 14. Output and control the local display 4.

  FIG. 3 shows an external view of the local display 4 of the present embodiment. As shown in the figure, the local display 4 is provided with a display screen 41 on which various information is displayed, and an oscillograph output connector 42 and operation switches for the aggregation display unit and the basic operation unit are provided below the display screen 41. ing. A connector 31 for connecting the external HI terminal 6 is mounted on the surface of the local display 4. The external HI terminal 6 is connected to the connector 31 via an Ethernet (registered trademark) I / F. As the type of the connector 31, a modular connector, USB, or RS-232C can be used.

  With this configuration, according to the present embodiment, the HI selection switch 5 is switched so that one of the local display 4, the portable HI terminal 6 a of the external HI terminal 6, or the remote HI terminal 6 b is selected. Since the external HI terminal 6 can be connected to the relay sequence processing CPU board 2 by selecting, the external HI terminal 6 has the same function as the local display 4 without changing the protection control unit and the program of the machine side display. You can have it.

  In particular, since it is not necessary to change the hardware configuration and program of the HI control CPU board 3 and the local display 4, the protection control device having the local display 4 of the touch panel system incorporated in the existing protection control device is connected to the external HI. The terminal 6 can be incorporated to have the same function as the local display 4.

  In the above-described embodiment, the example in which the local display 4 and the external HI terminal 6 are selected alternatively has been described. However, the present invention is not limited to this, and the protection control device is configured from both the local display 4 and the external HI terminal 6. Can be made operable.

  FIG. 4 shows another embodiment of the HI selection switch 5. As shown in the figure, a selection button 45 for direct operation, remote operation, and direct / remote operation is displayed on the display screen 41. In addition, a setting cancel button 46, a setting start button 47, and an operation start button 48 are displayed. One of the selection buttons 45 can be selected by depressing the setting start button 47. Next, after selecting one of the selection buttons 45, the operation start button 48 is pushed down to complete the switching of the operable human interface.

  Instead of switching by menu selection of the display screen, the local display 4 is provided with a terminal block 51 as shown in FIG. 5A, and the corresponding human interface terminal is short-circuited by the wiring 52 and selected. it can. Moreover, as shown in FIG.5 (b), it can form with the pushbutton switch 53, and as shown in FIG.5 (c), the twist switch 54 can be used.

  FIG. 6 shows still another embodiment of the HI selection switch 5. In this embodiment, when a connector 55 such as USB or RS-232C is provided on the local display 4, a medium such as a general mouse 56 is connected to the connector 55 and displayed by a displayed pointer 57. By selecting and clicking a menu item on the screen 41, it is possible to select and operate the human interface. Of course, the menu items on the display screen 41 can be selected and operated in a touch manner.

  Usually, the display screen 41 of the local display 4 is covered with a glass cover so as not to be easily operated, and the touch-type operation cannot be performed. According to the example, since it is not necessary to remove the glass cover, it is possible to eliminate the possibility of damage due to dropping or the like when the glass cover is removed.

It is a block diagram which shows the whole structure of embodiment of the protection control apparatus of this invention. It is a block diagram which shows the concept of the principal part of this embodiment. It is an external view of the local display of this embodiment. It is a figure which shows one Example which implement | achieves a HI selection switch on a display screen. It is a figure which shows the other Example of a HI selection switch. It is a figure which shows the further another Example of a HI selection switch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Protection control apparatus 2 Relay sequence processing CPU board 3 Human interface control CPU board 4 Local display 5 HI selection switch 6 External human interface terminal 11 CPU
12 memory 13 input / output interface 14 display interface 15 LAN control unit 16 switch interface 17 internal bus 20 HI switching means

Claims (1)

A protection control unit that executes protection calculation processing based on the system state quantity of the power system and outputs a shutdown command to a circuit breaker, etc., a display that displays the system state quantity and accident information output from the protection calculation unit, and A machine-side operation unit having an operation switch for setting the function and operation of the protection calculation unit, and the machine-side operation unit is provided externally with an input / output interface connected to the protection calculation unit via a bus A communication control unit that controls communication of a communication network to which an external operation terminal is connected; a switch interface that switches connection between the machine-side operation unit and the external operation terminal; the input / output interface; the communication control unit; In a digital protection control device in which an arithmetic processing unit for controlling an interface is connected via an internal bus,
The machine-side operation unit selects at least one of a connector for connecting the external operation terminal equipped with a web server and a web client to the internal bus via a communication interface, and the machine-side operation unit and the external operation terminal And selecting means to
The switch interface connects the Web server to at least one of the communication control unit and the Web client based on the selection by the selection unit.

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