JP2012050275A - Digital protection control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital protection control device enabling easy maintenance of HI to solve a problem of a conventional technology which can not start operation with changing settings of the digital protection control device while being able to display a latest state of the device on a WEB browser by using AJAX and also does not consider a recovery method in communication disconnection.SOLUTION: A digital protection control device comprises: a WEB server which uses HTTP as a communication protocol, communicates with a WEB browser installed in a PC, and is connected to a device system file; and an AJAX server connected to a setting value DB and a protection control part.

Description

  The present invention relates to a digital protection control device that performs protection calculation processing based on system information of a power system and outputs a disconnection command to a circuit breaker when a system fault occurs.

  The digital protection control device is a device that executes a protection calculation process based on system information of a power system and outputs a cutoff command to a protection control target.

  In such a digital protection control device, as described in [Patent Document 1], settings for protection calculation processing are managed on the device side, a WEB server is prepared, and a WEB browser is installed from a PC outside the device. There is a method for viewing and changing the setting state of the apparatus via the device.

  It is effective to use the AJAX technology introduced in [Non-Patent Document 1] as a technology for monitoring the real-time state of the apparatus using a WEB browser. In [Patent Document 2], the latest state of a network device is converted into an XML format, transmitted to a PC (personal computer), displayed on a WEB browser using AJAX technology, and the latest state of the device is monitored. Is described.

JP 2001-333549 A JP 2008-28211 A

Introduction to Ajax Practice Development for Java Developers (Technical Reviewer, November 2007)

  In the prior art described in [Patent Document 1], it is assumed that a Java (registered trademark) program executed on a WEB browser on a PC is downloaded from a WEB server. In this case, since the appearance, behavior, and communication procedure of HI (Human Interface) are installed in one program, there are difficulties in device variations and maintainability and customization that occur between generations. Further, since the digital protection control device has a long life cycle, there is a problem that it is difficult to follow the evolution of HI (Human Interface) that is rapidly progressing in the PC world.

  In the prior art described in [Patent Document 2], the latest state of the device can be displayed on the WEB browser using AJAX, but the operation of the digital protection control device can be changed and started. It was not possible, and the recovery method at the time of communication disconnection was not considered.

  A first object of the present invention is to provide a digital protection control device in which HI maintenance is easy.

  A second object of the present invention is to provide a digital protection control device that facilitates maintenance of HI and can use a rich library of AJAX.

  A third object of the present invention is to provide a digital protection control device that can be restored when device settings are changed, operation is started, or communication is disconnected.

  In order to achieve the above object, a digital protection control apparatus according to the present invention includes a first server including an information providing function for an application connected to a WEB browser provided in a PC via a network, and apparatus information. A second server for providing the information to be included.

  Further, it is composed of a WEB server for displaying an image design and an AJAX server for displaying device information, which communicate with a WEB browser provided in a PC using HTTP as a communication protocol.

  Also, it uses HTTP as the communication protocol, and is composed of a WEB server connected to the system file for the device that communicates with a WEB browser provided on the PC, and an AJAX server connected to the setting DB and protection control unit. is there.

  Also, a first server that communicates with a WEB browser provided on the PC using HTTP as a communication protocol and that provides a file in which the image design is recorded from the system file for the apparatus to the requesting PC 3, and is transmitted from the PC And a second server that obtains real-time information such as device information of the corresponding digital protection control device and returns it to the requesting PC.

  According to the present invention, there is an effect that the HI maintenance of the digital protection control device can be performed by the WEB system engineer.

The system block diagram of the digital protection control apparatus of one Embodiment of this invention. The figure which showed the structural example of the digital protection control apparatus. The figure which showed the structural example of PC. The figure which showed the example of the file system for apparatuses. The figure which showed the example of a screen display with a WEB browser. The figure which showed the example of the apparatus status display script. The figure which showed the example of the apparatus status acquisition command and its reply. The figure which showed the example of the apparatus information acquisition command and its reply. The figure which showed the example of the set value acquisition command and its reply. The figure which showed the example of the screen display during settling by a WEB browser. The figure which showed the example of the setting value setting command and its reply. The figure which showed the example of the setting value setting screen display in a WEB browser. The figure which showed the example of the operation start command and its reply. The figure which showed the example of an operation start screen display with a WEB browser.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a system configuration diagram of a digital protection control apparatus.

  The digital protection control device 1 is a device that executes a protection calculation process based on the amount of system information of the power system and outputs a cutoff command to the circuit breaker that is the protection control target 4. A communication line 2 that performs communication between the digital protection control device 1 and a plurality of PCs 3 is a LAN (local area network) based on the Internet protocol. As will be described later, the plurality of PCs 3 can remotely monitor and set the digital protection control device 1 via the communication line 2.

  FIG. 2 is a diagram illustrating a configuration example of the digital protection control device 1.

  The digital protection control device 1 includes a WEB server 10, a device file system 11 connected to the WEB server 10, an AJAX server 12, a setting value DB 13 (setting value database 13) and a protection control unit 14 connected to the AJAX server 12. Composed.

  The WEB server 10 is a server that listens on a TCP (Transmission Control Protocol / Internet Protocol) port 80 in accordance with the HTTP (hypertext transfer protocol) protocol. In accordance with the file name specified by the HTTP / GET request transmitted from the PC 3, the file held in the device file system 11 is returned to the requesting PC 3.

  Here, Apache HTTP Server (also simply referred to as Apache), which is generally used as free software, may be used as the server, but HTTP / GET is implemented when it is desired to use a lightweight WEB server.

  The device file system 11 manages file names and file entities. In general, secondary storage such as a hard disk is used. However, in the case of the digital protection control apparatus 1, files are often managed in a memory in order to improve safety.

  The AJAX server 12 is a server that listens on TCP port 8080 according to the HTTP protocol. This TCP port number needs to be corrected by a script, but in actuality, it can be freely determined within the restricted range of the HTTP protocol.

  The AJAX server 12 interprets the command issued by the HTTP / POST request from the PC 3, returns or updates the setting value managed in the setting value DB 13, and updates the setting to the protection control unit 14. Based on the function to instruct the start of operation. In response to the POST request, the XML format, the JSON format, or the like can be used according to the AJAX rules.

  The setting value DB 13 records basic information such as a line name, relay name, settable information including a range of numerical values, units, and decimal point positions, and a settling value of a relay.

  The protection control unit 14 performs a protection calculation process based on the system information amount of the power system based on the setting of the setting value DB 13. In addition to outputting a shut-off command to the protection control target 4 according to the calculation result, the calculation result can be held and monitored by the PC 3 via the AJAX server 12.

  Here, the WEB server 10 has been described. However, the WEB server 10 does not have to be a WEB server, and includes a first information providing function for an application that provides an application such as a file in which an image design described later is recorded to the requesting PC 3. Any server can be used.

  Although the AJAX server 12 has been described, it may not be an AJAX server, but a second control right management for acquiring real-time information such as device information of a digital protection control device to be described later and returning it to the requesting PC. Any server can be used.

  By providing the first server and the second server as described above, the HI maintenance of the digital protection control device can be performed by the WEB system engineer.

  FIG. 3 is a diagram illustrating a configuration example of the PC 3.

  In order to access the digital protection control device 1 from the PC 3, the PC 3 is provided with a WEB browser 31, a file system 33, and a WEB proxy 32 as necessary.

  The web browser 31 includes an HTML processing unit 311, a script processing unit 312, and a communication unit 313. The communication unit 313 acquires the requested file from the WEB server 10 according to the HTTP protocol, and executes the requested command on the AJAX server 12. The communication result with the digital protection control device 1 is managed by the file system 33, and files that are not changed on the digital protection control device 1 side are cached.

  The HTML processing unit 311 has a function of interpreting files in HTML format and CSS (Cascading Style Sheets) format and displaying them on the WEB browser 31. The script processing unit 312 has a function of interpreting a file in HTML format or JS (Java Script) format, and interpreting and executing the file using a JavaScript (registered trademark) engine.

  As the WEB browser 31 that can execute such a function, Internet Explorer (registered trademark) 6 manufactured by Microsoft Corporation or FireFox (registered trademark) provided by Mozilla (registered trademark) can be used.

  The WEB proxy 32 includes a proxy processing unit 321 and a communication alignment unit 322. The proxy processing unit 321 performs proxy processing of HTTP communication from the WEB browser 31 of itself or another PC 3, and Squid is known as free software for realizing this function.

  The communication alignment unit 322 rearranges the requests in the order of HTML, CSS, and JS and returns them one by one in order to reduce the load caused by the simultaneous parallel request to the WEB server 10 as seen in the default setting of FireFox. It is a function.

  The digital protection control device 1 tends to increase the CPU load of the protection control target 4 that requires high-speed arithmetic processing. When the protection control target 4 and the WEB server 10 are executed by the same CPU, the communication processing cannot be performed in time. Use this function.

  FIG. 4 is a diagram showing an example of the device file system 11. FIG. 5 is a diagram showing a screen display example in the WEB browser.

  The index.html 111 of the device file system 11 shown in FIG. 4 is a file that is first accessed from the PC 3 to the digital protection control device 1, and calls the screen selected from the top menu 34 and menu 35 shown in FIG. A script is included.

  The top menu 34 includes a name display 341 and a device status display 342, and HTML representing the device status display 342 is a part of index.html indicated by reference numeral 1111. The index.css112 of the device file system 11 shown in FIG. 4 is a file that defines the layout and color of the index.html 111.

  jquery-1.4.min.js113 is a script written in JavaScript (registered trademark) for realizing AJAX, and is provided as free software.

  The realtime.js 114 is a script for displaying the device status display 342 of the top menu 34 in real time, and includes the device status display script 1141 shown in FIG.

  As shown in FIG. 6, the device status display 342 can be changed by calling the library of jquery-1.4.min.js113 using the id of a part 1111 of index.html.

  setting.html 115 is an HTML file of the setting screen 36 shown in FIG. 5 and is displayed when setting is selected from the menu 35. On the setting screen 36, a page setting unit 361, a setting start button 362, an operation start button 363, a numerical value input unit 364, a relay name display unit 365, a setting value display unit 366, a setting range display unit 367, and an error display unit 368 are displayed. Is done.

  The setting.cs 116 is a file that defines the layout and color of the setting.html 115. setting.js 117 is a script that realizes the setting process on the setting screen 36.

  FIG. 7 is a diagram showing an example 121 of a device status acquisition command and its reply.

  In realtime.js114 shown in FIG. 4, when cmd = SYSTEM_STATUS, which is a device status command shown in FIG. 7, is sent to the AJAX server 12, the status is returned in the XML format as a reply.

  In the case of the example shown in FIG. 7, since the condition is 128, the normal if statement of the device status display script 1141 shown in FIG. 6 is executed, and the background color of the box with id = “seijo” is changed to “Time”. Is done. Everything else is changed to transparent. By periodically repeating this communication, the real-time state of the apparatus can be monitored on the WEB browser 31.

  FIG. 8 is a diagram showing an example 122 of device information acquisition command and its reply.

  In the setting.js 117 shown in FIG. 4, when the cmd = SETTING_VAL_INFO, which is the settling information acquisition command shown in FIG. 8, is transmitted to the AJAX server 12, the settling screen 36 shown in FIG. 5 is displayed in the XML format as a reply. Information necessary for is returned. The returned <type page = '4' /> indicates that the maximum number of pages is 4, and <data index = '1' /> indicates the first page.

  Information described after the <element> tag is relay information, name is a relay name, no is a display position, type is an input method, dec is a digit position of a decimal point, unit is a unit, min is a minimum value, and max is a value. The maximum value is shown. In order to display the settling screen 36 shown in FIG. 5, it is necessary to execute a device information acquisition command and the next setpoint acquisition command.

  FIG. 9 is a diagram showing an example 123 of a set value acquisition command and its reply.

  In setting.js 117 shown in FIG. 4, when cmd = SETTING_VAL, which is a setting information acquisition command shown in FIG. 8, is sent to the AJAX server 12, a setting value is returned in the XML format as a reply.

  For example, the first <data> 50 </ data> corresponds to <data name = '144SX1' no = '1' type = '1' dec = '2' unit = 'Ω' min = '10 'max in FIG. = '2500' />. The fixed-point calculation is a data value * 10 ^ (-dec) and is displayed as 0.50Ω.

  FIG. 10 is a diagram showing an example 3601 of a screen display during settling with a WEB browser.

  When the settling start button 362 shown in FIG. 5 is pressed, the mode is shifted to the settling mode. By clicking the relay to be set among the relays displayed in the relay name display unit 365, the setting can be performed.

  Based on <data name = '151Do (ΔI)' no = '7' type = '1' dec = '1' unit = 'A' min = '5' max = '50 '/> shown in FIG. By interpreting “=“ 1 ”, 0.5A ≦ 151Do (ΔI) ≦ 5.0A is displayed on the settling range display section 367. The numerical value input unit 364 can write a value that falls within this settling range. If it is outside the settling range, an input error will occur. If there is a relay that is outside the settling range at the initial setting, a message that an absolute value defect has occurred is displayed on the error display section 368.

  FIG. 11 is a diagram showing an example 124 of a set value setting command and its reply.

  The setting of the set value is declared at the beginning of the session so that a halfway one is not operated due to a communication failure or the like.

In setting.js 117 shown in FIG. 4, when cmd = SESSION_START, which is a setting setting command shown in FIG. 8, is sent to the AJAX server 12, a session ID is returned in the XML format as a reply. It is necessary to continue communication using this session ID until the start of operation or settling is stopped. After starting a session, communication using a session from another PC 3 results in an error. An error also occurs if an invalid session ID is used.

  When the cmd = SETTING_WRITE command and the setting parameter are transmitted to the AJAX server 12 using the obtained session ID, OK is returned if the transmission is successful.

  As described above, by declaring the start of the session at the beginning of the setting of the setting value, it is possible to prevent the setting of the setting value from becoming inaccurate due to a communication failure or the like.

  FIG. 12 is a diagram illustrating an example 3602 of a set value setting screen display in a WEB browser.

  When set according to the procedure described in FIG. 11, the state shown in FIG. 12 is obtained. When all the relays are free of defects, the operation start button 363 shown in FIG.

  FIG. 13 is a diagram showing an operation start command and an example 125 of its reply.

  If the operation start command cmd = SETTING_EXECUTE shown in FIG. 13 is transmitted to the AJAX server 12 in setting.js 117 shown in FIG. 4, OK is returned when the operation start is successful as a reply. Furthermore, when cmd = SESSION_END is transmitted to the AJAX server 12 in setting.js 117, OK is returned when the session is successfully completed.

  In this way, by starting the operation with the operation start button, it is possible to confirm that the relay is no longer defective and start the operation.

  FIG. 14 is a diagram showing an example 3603 of an operation start screen display in a WEB browser.

  When the operation start is successful in the procedure described in FIG. 13, the display of the error display unit 368 shown in FIG. 5 disappears, and the digital protection control device 1 is in a normal operation state.

  Here, the WEB server 10 has been described. However, the WEB server 10 does not have to be a WEB server, and may be a first server that provides a request-source PC 3 with a file in which an image design is recorded from an apparatus system file.

  Although the AJAX server 12 has been described, it may not be an AJAX server. It determines a command transmitted from the PC, acquires real-time information such as device information of the corresponding digital protection control device, and sends it to the requesting PC. What is necessary is just the 2nd server to reply.

  According to the present embodiment, AJAX (Asynchronous JavaScript (registered trademark) + XML) that can be used in the latest WEB browser is used, the screen design (also referred to as appearance) of HI, HTML (Hyper Text Markup Language), and real-time device information. By describing JavaScript (behavior) in JavaScript, customizability is improved, HI maintenance is facilitated, and a rich library of AJAX can be used.

  Also, by returning device information in XML format using asynchronous communication, screen design, device information display, and communication processing can be managed independently, and device variations and inter-generation compatibility are improved.

  In addition, the HI system engineer can maintain the HI of the digital protection control device, and can follow the evolution of the HI. In addition, using the rich library of AJAX, it is possible to provide a highly customizable HI that takes advantage of the performance of the PC.

  In addition, by introducing session management in AJAX communication, it is possible to provide a recovery method at the time of device setting change, operation start, and communication disconnection.

1 Digital Protection Controller 2 Communication Line 3 PC
4 Protection Control Object 10 WEB Server 11 Device File System 12 AJAX Server 13 Setting Value DB (Setting Value Database)
14 Protection Control Unit 31 WEB Browser 32 WEB Proxy 33 File System

Claims (9)

  A digital protection control device comprising a first server including an information providing function for an application connected to a WEB browser provided in a PC via a network, and a second server providing information including device information.   A digital protection control device comprising a WEB server for image design display that communicates with a WEB browser provided in a PC using HTTP as a communication protocol, and an AJAX server for device information transmission.   Digital protection control composed of a WEB server connected to the system file for the device, which communicates with a WEB browser provided on the PC, using HTTP as a communication protocol, and an AJAX server connected to the setting value DB and the protection control unit apparatus.   A first server that communicates with a WEB browser provided on a PC using HTTP as a communication protocol, and that provides a file in which an image design is recorded from an apparatus system file to a requesting PC 3, and a command transmitted from the PC A digital protection control device comprising a second server that determines real-time information such as device information of the corresponding digital protection control device and returns it to the requesting PC.   The AJAX server is connected to a protection control unit that outputs a circuit breaker shutdown command in the event of a power system failure, and a setting value DB that manages a setting value and a setting range of protection arithmetic processing. 4. The digital protection control device according to claim 2, wherein the described script is managed and distributed.   The digital protection control device according to claim 2 or 3, wherein the AJAX server shifts to a settling mode by a settling start button in the WEB browser and displays a message when a set value at the time of input is out of a set range.   4. The digital protection control according to claim 2, wherein the AJAX server receives a session management command, returns a session ID to the PC, and determines that the communication is an effective session using the session ID. apparatus.   4. The digital protection control apparatus according to claim 2, wherein the WEB server holds an HTML file that defines screen contents, a CSS file that defines screen layout and design, and a script file that can be executed on a WEB browser.   4. The digital protection control device system comprising the digital protection control device according to claim 2, wherein the PC displays the device information transmitted from the AJAX server on a screen, and the displayed screen is a setting value input screen. .

Images