JP4551885B2 - Digital protection control device - Google Patents

Description

  The present invention relates to a digital protection control device that performs protection control of a protection control target, and more particularly to a digital protection control device that performs protection control of a power system.

  A digital type protection control device that protects the power system inputs a state quantity such as an electric quantity of the power system, converts it into a digital quantity, performs a predetermined protection control calculation using this digital quantity, and the calculation result The protection of the electric power system is controlled by controlling the circuit breaker and the like according to the above. In addition, since this kind of technique is already well-known, the detailed description is abbreviate | omitted here (for example, refer nonpatent literature 1).

  These digital protection control devices are equipped with an Internet protocol communication means and a Web server, establish a home page on the Web server, and operate and browse information inside the protection control device by a browser, so that the network In some cases, the operation status of the protection control device is monitored and operated remotely. Since this type of technology is already known, detailed description thereof is omitted here (see, for example, Non-Patent Document 2).

  Moreover, since the bus protection relay device for protecting the bus at the electric station has a wide power failure range and has a great influence on the operation of the power system when malfunctioning, the reliability of the device is improved by using a plurality of units. Using a collective protection control unit that collectively protects a plurality of buses at an electric power station and a divided protection control unit that protects each busbar, it is possible to configure a protection control device by an AND configuration of these unit units. Detailed description thereof is omitted here (for example, see Patent Document 1).

  FIG. 5 is a diagram showing a conventional digital protection control apparatus using a plurality of units.

  The protection control device 1 is composed of two protection control units 2-1 and 2-2 that perform protection control of the protection control target 3, and these protection control units 2-1 and 2-2 perform a protection control function. Protection control function units 4-1 and 4-2, Web servers 5-1 and 5-2, and Internet protocol communication units 7-1 and 7-2.

  In such a configuration, information on the protection control function units 4-1 and 4-2 is displayed or an operation on the protection control function units 4-1 and 4-2 is performed via the network 9 by the browser of the computer 8. It is possible to implement.

  HTML (Hyper Text Markup Language), Java (registered trademark) applet, CGI (Common Gateway Interface), etc. are mounted on the Web servers 5-1 and 5-2, and information on the protection control device 1 is accessed from a browser on the computer 8 By doing so, the information of the protection control function units 4-1 and 4-2 is displayed or the operation to the protection control function units 4-1 and 4-2 is realized. At this time, access from the browser to the protection control device 1 is performed by designating URLs (Uniform Resource Locators) shown below.

Access to protection control unit 1 http: // Internet protocol communication means 7-1 IP address: Web server 5-1 port number / file name Access to protection control unit 2 http: // Internet protocol communication means 7- 2 IP address: Web server 5-2 port number / file name
JP 2001-112165 A Electric Cooperative Research Vol. 41, No. 4, “Digital Relay”, page 14 1999 IEEJ National Convention No. 1601 "Proposal of Intranet Application Protection Control System"

  Although the protection control device 1 described above is a single device, the protection control units 2-1 and 2-2 have Internet protocol communication means 7-1 and 7-2, respectively. It is necessary to provide two IP addresses, which are numbers for identification, for one protection control device. Therefore, when one protection control device is constituted by a plurality of protection control units as in the bus protection relay device, and one protection control device is constituted by one protection control unit as in the transmission line protection relay device. The operation method differs depending on the configuration. That is, when one protection control device is constituted by a plurality of protection control units, it is necessary to access two different IP addresses twice for access to one protection control device.

  In addition, a large number of protection control devices are connected on the network. Since it is necessary to assign IP addresses that do not overlap to these devices, the number of IP addresses assigned to one protection control device is reduced. There is also a need.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a digital protection control device that can be accessed by one IP address in a protection control device having a plurality of protection control units. .

  According to the first aspect of the present invention, in the digital protection control apparatus having the first protection control unit and the second protection control unit that perform protection control of the protection control object, the first protection control unit includes the protection control unit. A protection control function unit that acquires protection control target state information indicating a state of the target power system, and that performs protection control processing of the power control target power system based on the acquired protection control target state information; and the protection A Web server that provides a Web page for displaying protection control target state information acquired by the control target function unit and instructing the protection control function unit, and a first Internet protocol that enables access from an external browser A second interface for communicating with the communication means and the Internet protocol communication means of the second protection control unit. Based on the port number included in the URL for accessing the first Internet protocol communication unit from the external protocol communication unit and the external browser, and the URL determined to be converted is determined Is converted based on a predetermined conversion rule, the converted URL is routed to the Web server of the second protection control unit via the second Internet protocol communication means, and it is determined that no conversion is performed. Routing means for routing the received URL to the web server of the first protection control unit, wherein the second protection control unit has the same protection control target as the protection control target of the first protection control unit. Acquire protection control target status information of the power system, and in the acquired protection control target status information Zui by a digital protective control apparatus, characterized by comprising a protection control function unit for performing the protective control process of the protection control object.

  According to a second invention, in the first invention, when the routing means determines to perform URL conversion, the IP address and port number included in the URL are stored in the Web server of the second protection control unit. A digital type protection control device that converts an IP address and a port number that can be accessed.

  According to a third aspect, in the first aspect, the Web server of the first protection control unit includes a link to a Web page provided by the Web server of the first protection control unit, and the second protection control unit. A digital-type protection control apparatus, further comprising means for displaying a link page that presents a link to a Web page provided by a Web server of the protection control unit.

  According to the present invention, it is possible to provide a digital protection control apparatus that can be accessed by one IP address in a protection control apparatus having a plurality of protection control units.

  A digital protection control apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing a configuration of a digital protection control apparatus according to an embodiment of the present invention. The same parts as those in FIG. 5 will be described with the same reference numerals.

  The protection control device 1 includes two protection control units 2-1 and 2-2 that perform protection control of the protection control target 3.

  The protection control unit 2-1 includes a protection control function unit 4-1, a Web server 5-1, a routing unit 6, an Internet protocol communication unit 7-1, and an Internet protocol communication unit 7-3. The protection control unit 2-2 includes a protection control function unit 4-2, a Web server 5-2, and an Internet protocol communication unit 7-2.

  The protection control function units 4-1 and 4-2 acquire protection control target state information indicating the state of the power system of the protection control target 3, and based on the acquired protection control target state information, the power of the protection control target Implement system protection control processing.

  When the protection control function units 4-1 and 4-2 acquire protection control target state information indicating the state of the same post-protection control target power system, the protection control device is a redundant protection control device. In this case, it does not matter whether or not they are the same.

  The Web servers 5-1 and 5-2 display the protection control target state information acquired by the protection control function units 4-1 and 4-2 by the browser of the external computer 8 or the protection control function units 4-1 and 4. -2 are displayed for performing operations for -2.

  The Internet protocol communication units 7-1 and 7-2 can be accessed from the browser of the external computer 8.

  The protection control unit 2-1 of the present embodiment is provided with Internet protocol communication means 7-3 and routing means 6. The Internet protocol communication unit 7-3 is connected to the Web server 5-1 and the Internet protocol communication unit 7-1 via the routing unit 6.

  Communication is possible by assigning a local IP address to the Internet protocol communication means 7-1 and the Internet protocol communication means 7-3 in the protection control unit 2-1, and connecting them.

  The routing means 6 includes a conversion table 6a in which a relationship for converting an IP address and a port number requested to be connected from an external computer 8 into an IP address and a port number of a protection control unit to be accessed is set in advance. To do.

  FIG. 2 is a diagram showing the conversion table 6a.

  As shown in the figure, the conversion table 6a stores an IP address and a port number at the time of an access request from a browser of an external computer and a converted IP address and a port number in association with each other.

  In the figure, “ABCD” is the IP address of the Internet protocol communication means 7-1, “GHJ” is the IP address of the Internet protocol communication means 7-2, and “E” is The port numbers “F” of the Web servers 5-1 and 5-2 are routing port numbers.

  According to the setting of the conversion table 6a shown in FIG. 2, the connection-destination protection control unit is switched as follows according to the port number accessed from the browser of the external computer 8.

  That is, if there is an access from the browser at the URL shown in (1), the IP address and the port number after conversion by the routing means 6 do not change, so that the connection is made to the Web server 5-1 of the protection control unit 2-1.

http: // A. B. C. D: E / file name (1)
If there is an access from the browser at the URL shown in (2), the IP address and port number after conversion by the routing means 6 will be the URL shown in (3), via the Internet protocol communication means 7-3 and 7-2. , Connected to the Web server 5-2 of the protection control unit 2-2.

http: // A. B. C. D: F / file name (2)
http: // G. H. I. J: E / file name (3)
Next, the operation of the digital protection control apparatus according to the embodiment of the present invention will be described with reference to the flowchart of FIG.

  When the URL of the Internet protocol communication means 7-1 is accessed from the browser of the external computer 8 (S1), the routing means 6 receives the URL via the Internet protocol communication means 7-1 and is included in the received URL. It is determined whether or not the port number to be assigned is “F” (S2).

  If it is determined in S2 that the port number is “F”, the IP address and the port number are converted according to the conversion rule defined in the conversion table 6a (S3), where Internet protocol communication means is used. The IP address “A.B.C.D” of 701 is converted to the IP address “G.H.I.J” of the Internet protocol communication means 7-2, and the port number “F” is changed to the port number “E”. Convert.

  The URL (IP address and port number) converted by the routing means is routed to the Web server 5-2 via the Internet protocol communication means 7-3 and 7-2 (S4).

  On the other hand, if it is determined in S2 that the port number is not “F”, the accessed URL, that is, the IP address “ABCD” and the port number “E” are not converted. Routing processing to the Web server 5-1 is performed (S5).

  Therefore, according to the embodiment of the present invention, the IP address is converted by the routing means 6 by changing the port number accessed from the browser. B. C. A plurality of protection control units can be accessed using only D.

  In addition, according to the present embodiment, it is possible to make one IP address for accessing one protection control device configured by using a plurality of protection control units. And the number of IP addresses assigned to the protection control device can be minimized.

(Modification)
Next, a modification according to the embodiment of the present invention will be described.

  In the modified example of the present embodiment, in addition to the above-described embodiment, a button for linking to the remote operation screen home page provided by each Web server 5-1, 5-2 is displayed on the Web server 5-1. A function for displaying a remote operation link screen is provided.

  FIG. 4 is a diagram illustrating a display example of a browser screen implemented in the Web server 5-1. As shown in FIG. 4, the remote operation link screen 10 is provided with the link button 11-1 to the remote operation screen home page provided by the Web server of the protection control unit 2-1, and the Web server of the protection control unit 2-2. The link button 11-2 to the remote operation screen homepage to be displayed is displayed.

  The URL shown in (4) is set as the hyperlink in the link button 11-1 and the URL shown in (5) is set in the link button 11-2.

http: // A. B. C. D: E / Remote operation screen homepage file name (4)
http: // A. B. C. D: F / Remote operation screen homepage file name (5)
(4) and (5) are the same IP address “ABCD” and the port numbers are set to be different from “E” and “F”.

  When each link button is pressed, the set hyperlink is issued from the browser as a URL, so that the Web servers 5-1 and 5-2 of the protection control units 2-1 and 2-2 are similar to the above-described embodiment. 2 can access the remote operation screen homepage provided by each.

  Therefore, according to this embodiment, it is possible to access the remote operation screen to the protection control unit 2-1 and the protection control unit 2-2 by registering the URL to the remote operation link screen in the browser. It becomes.

  In addition, since it is possible to consolidate access to one protection control device configured using a plurality of protection control units in one place of the remote operation link screen, the operability of the digital protection control device is improved, The number of IP addresses assigned to the digital protection controller can be minimized.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

It is a figure which shows the structure of the digital type protection control apparatus which concerns on embodiment of this invention. It is a figure which shows a conversion table. It is a flowchart for demonstrating operation | movement of the digital type protection control apparatus which concerns on embodiment of this invention. It is a figure which shows the example of a display of the browser screen mounted in a web server. It is a figure which shows the digital type protection control apparatus using the conventional several unit.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Protection control apparatus, 2-1, 2-2 ... Protection control unit, 3 ... Protection control object, 4-1, 4-2 ... Protection control function part, 5-1, 5-2 ... Web server, 6 ... Routing means, 6a ... Conversion table, 7-1, 7-2, 7-3 ... Internet protocol communication means, 8 ... Computer, 9 ... Network.

Claims (4)

In a digital protection control apparatus having a first protection control unit and a second protection control unit for performing protection control of a protection control object,
The first protection control unit includes:
A protection control function unit that acquires protection control target state information indicating the state of the protection control target power system, and that performs protection control processing of the protection control target power system based on the acquired protection control target state information; ,
A web server that provides a web page for displaying protection control target state information acquired by the protection control target function unit and instructing the protection control function unit;
A first internet protocol communication means enabling access from an external browser;
Second internet protocol communication means for communicating with internet protocol communication means of the second protection control unit;
Based on the port number included in the URL for accessing the first Internet protocol communication means from the external browser, it is determined whether or not to convert the URL. Based on the conversion rule, the converted URL is routed to the Web server of the second protection control unit via the second Internet protocol communication means, and the URL determined not to be converted is the first URL. Routing means for routing to the web server of one protection control unit,
The second protection control unit includes:
The protection control target state information of the power control target power system that is the same as the protection control target of the first protection control unit is acquired, and the protection control processing of the protection control target is performed based on the acquired protection control target state information. A digital protection control device comprising a protection control function unit to be implemented.   When the routing unit determines to convert the URL, the routing unit converts the IP address and port number included in the URL into an IP address and port number accessible to the Web server of the second protection control unit. The digital protection control device according to claim 1. The web server of the first protection control unit is
Means for displaying a link page presenting a link to a web page provided by the web server of the first protection control unit and a link to a web page provided by the web server of the second protection control unit; The digital protection control apparatus according to claim 1, further comprising: A first protection control unit and a second protection control unit for performing protection control of the protection control target;
The first protection control unit includes:
A protection control function unit that acquires protection control target state information indicating the state of the protection control target power system, and performs protection control processing of the protection control target based on the acquired protection control target state information;
A Web server that provides a Web page for displaying protection control target state information acquired by the protection control target function unit and instructing the protection control function unit;
A first internet protocol communication means enabling access from an external browser;
Second internet protocol communication means for communicating with internet protocol communication means of the second protection control unit;
The second protection control unit includes:
The protection control target state information of the power control target power system that is the same as the protection control target of the first protection control unit is acquired, and the protection control processing of the protection control target is performed based on the acquired protection control target state information. In a protection control method of a digital protection control device having a protection control function unit to be implemented,
Determining whether to convert the URL based on a port number included in the URL for accessing the first Internet Protocol communication means from the external browser;
The URL determined to be converted is converted based on a predetermined conversion rule,
This converted URL is routed to the Web server of the second protection control unit via the second Internet protocol communication means, and the URL determined not to be converted is sent to the Web of the first protection control unit. A protection control method characterized by routing to a server.

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