CN203135573U

CN203135573U - Relay protection device

Info

Publication number: CN203135573U
Application number: CN2012205108470U
Authority: CN
Inventors: 朱来强; 张激; 邓素碧; 官建涛
Original assignee: Siemens Power Automation Ltd
Current assignee: Siemens Power Automation Ltd
Priority date: 2012-09-29
Filing date: 2012-09-29
Publication date: 2013-08-14
Anticipated expiration: 2022-09-29

Abstract

The utility model provides a relay protection device used for a digital transformer substation. The relay protection device comprises a processing unit, a switchboard chip and two network interfaces, wherein the processing unit is integrated with at least one Ethernet controller and is used for sending and receiving Ethernet data frames; the switchboard chip at least comprises a first port and two or more second ports, the first port is connected to a single Ethernet controller which is integrated on the processing unit, the first port and the second ports can be configured into at least two virtual local area networks, and the first port is shared in the at least two virtual local area networks; each network interface is connected to at least one second port in the different virtual local area networks on the switchboard chip, and the two network interfaces can be respectively connected to first and second communication networks; and network ports of the Ethernet controllers connected to the switchboard chip are bound to IP addresses of different network segments.

Description

Protective relaying device

Technical field

The utility model relates to protective relaying device, relates in particular to a kind of protective relaying device for digital transformer substation.

Background technology

At present, domestic digital transformer substation generally is to divide layer building by intelligent primary equipment (for example, electronic mutual inductor, intelligent switch etc.) and networked secondary device.The general two net three-deckers that adopt of the hierarchy of digital transformer substation.Here, " three layers " refer to process layer, wall, substation level." two nets " refers to two communication networks between the adjacent layer, just, and the communication network between substation level and the wall, and the communication network between wall and the process layer.These two communication networks can be independent of one another, also can consider that whole network realizes the IEC communication protocol by single net, to realize information sharing and the interoperability between each intelligent electric equipment in the transformer station via communication network.Wherein, the process layer can adopt point-to-point structure to the communication network between the wall, and the communication network between wall and the substation level generally adopts network topology structures such as Star Network or looped network.For the transformer station more than the 220KV, generally also need the communication network of interlayer to satisfy the requirement of double-network redundant.

Fig. 1 is the network topology structure that example exemplarily shows a kind of double-network redundant of digital transformer substation with the communication network between wall and the substation level.As shown in Figure 1, the communication network between wall and the substation level is actual comprises two separate communication network NETA and NETB.Each communication network (NETA or NETB) comprises an Ethernet switch (as 140-1 and 140-2) at least, is used for switching each automatic network packet.Each equipment of wall and substation level all is connected in these two communication networks, thereby constitutes double-network redundant.For example, monitoring unit 110-1, the 110-2 of substation level and the server 120-1, the 120-2 that have a man-machine interface have two network ports separately, are connected respectively to two communication network NETA and NETB.Similarly, the protective relaying device 130-1 in the wall and 130-2 also need to have two network ports and are connected respectively to NETA and NETB.

In actual applications; because an ethernet controller (just network interface card or network interface) can only be connected in the network; therefore; in order to realize the topology of double-network redundant as shown in Figure 1; each protective relaying device 130 need be equipped with two ethernet controller Eth0 and Eth1 in its processing unit (CPU), just can be connected to network N ETA and NETB.Like this, if because of the restriction of equipment, the CPU of relay protection only has an ethernet controller Eth0 (network interface just), then can't realize this double-network redundant communication.

Moreover, in the Ethernet structure shown in Figure 1 also broadcast storm can appear.So-called broadcast storm refers to when a Frame is transferred to each node on the network segment (being defined by broadcast domain), may be because design and the connectivity problem of network topology, or other reasons (as switch ports themselves fault, network interface card fault, virus etc.) causes this Frame massive duplication, propagation in the network segment, thereby cause network performance to descend, even network paralysis.When broadcast storm occurring in the Ethernet shown in Figure 1, the CPU of protective relaying device has to handle a large amount of broadcast data frames, thus can because of long-time occupied can't operate as normal.

For the problem of broadcast storm, multiple solution is arranged at present.From the angle of protective relaying device, the software of protective relaying device can be designed to arrange protection algorithm task priority than network task height.Though this software design can solve subproblem, because receiving network data can produce interruption, so if a large amount of short messages is broadcasted data, CPU still may be owing to frequent the interruption causes protecting the algorithm task to can not get carrying out.Another kind of solution is that protective relaying device adopts repeating query formula network-driven, just closes the interruption of ethernet controller, poll Ethernet data in task.This scheme can solve because the relaying protection afunction that frequent interruption causes.But the problem of this scheme is that the polling interval do not have clear and definite standard.The polling interval weak point can cause CPU too much to be taken.Polling interval length can cause problems such as network service low-response.From the angle of Ethernet switch, at present the part switch is supported flow control function, therefore can be by Ethernet switch arranged to suppress broadcast storm.But the switch price with this function is expensive a lot of than general switch.And the configuration of switch need be finished in project implementing process, and this brings difficulty for actual operation.

The utility model content

Consider the above problem of prior art, a purpose of the present utility model is to provide a kind of protective relaying device, and it can realize two Netcoms letter under the situation that only is integrated with an ethernet controller on the CPU of protective relaying device.Another purpose is to provide a kind of protective relaying device that can suppress broadcast storm.

In order to address the above problem, the utility model proposes a kind of protective relaying device for digital transformer substation, comprising: processing unit, be integrated with at least one ethernet controller on it, be used for sending and receiving ethernet data frame; Exchanger chip, at least have first port and two or more second ports, wherein first port is connected to the described individual ethernet controller that is integrated on the described processing unit, described first port and second port can be configured at least two VLANs, and described first port is shared in described two VLANs at least; Two network interfaces, each network interface are connected to second port of at least one in the different virtual LAN on the described exchanger chip, and described two network interfaces can be connected respectively to first and second communication networks; Wherein, the network interface that is connected to the ethernet controller of described exchanger chip is bundled in the IP address of different segment.Preferably, described first and second communication networks are redundant network each other.More preferably, described first and second communication networks are the communication network between process layer and the wall, perhaps are the communication network between substation level and the wall.

Preferably, described exchanger chip has the broadcast storm defencive function.More preferably, described exchanger chip (320,520) has afterbody sign (Tail Tag) recognition function, that is, described exchanger chip can identify the afterbody sign in the ethernet frame, and the ethernet frame that has effective afterbody sign can be transmitted on each second port automatically.

In an embodiment of the present utility model, described processing unit is integrated with at least two ethernet controllers; Described protective relaying device also comprises: the 3rd network interface, and it is suitable for being connected to third communication network; Have at least an ethernet controller to be connected to the 3rd network interface in the described ethernet controller.Preferably, described third communication network is used for the described protective relaying device of debugging.

The protective relaying device that the utility model proposes can be neatly expands to two network interfaces with the single network interface of processing unit, satisfies the requirement of double-network redundant.And this expansion does not need the Ethernet switch in the network is configured.Moreover because the exchanger chip that the utility model uses can be supported the broadcast storm defencive function, thereby by corresponding setting, exchanger chip can play a role in filtering to the broadcasting data, so processing unit can not be subjected to the strong influence of broadcast storm.The Tail Tag function of the employed exchanger chip of protective relaying device that the utility model proposes in addition, can be transmitted the GOOSE data automatically under two net topology structures.So for the GOOSE data, processing unit only needs to send packet one time, then by exchanger chip on behalf of forwarding, can alleviate the load of processing unit thus.

Description of drawings

Further feature of the present utility model, characteristics, advantage and benefit will become more apparent by the detailed description below in conjunction with accompanying drawing.Wherein:

Fig. 1 shows an exemplary digital transformer substation network topology structure schematic diagram;

Fig. 2 shows the structured flowchart according to the protective relaying device of an embodiment of the utility model;

Fig. 3 shows the application schematic diagram according to the protective relaying device of an embodiment of the utility model;

Fig. 4 shows the tail tag note frame format schematic diagram of using at GOOSE.

Fig. 5 shows the application schematic diagram according to the protective relaying device of another embodiment of the utility model;

Embodiment

Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast description of drawings embodiment of the present utility model.

Fig. 2 is exemplary shows structured flowchart according to the protective relaying device 200 of an embodiment of the utility model.As shown in Figure 2, comprise processing unit (CPU) 210, exchanger chip 220 and two network interface 230-1 and 230-2 at protective relaying device 200.Preferably, CPU 210 is integrated with an ethernet controller 215 on the sheet, as an interface that connects CPU 210 and transmission medium.Alternatively, ethernet controller 215 also can be integrated among the CPU 210, and needn't exist in mode integrated on the chip.Ethernet controller 215 can be realized physical connection between CPU 210 and the exchanger chip 220 and signal of telecommunication coupling, one or more in the functions such as the encoding and decoding of transmission that can also achieve frame and the encapsulation of reception and frame and opening, medium access control, data and data buffer memory.Exchanger chip 220 shown in Figure 2 need have at least three ports.In example shown in Figure 2, port PO RT 3 is connected with ethernet controller 215 on the CPU 210, and two other port PO RT1 and PORT2 are connected respectively to two network interface 230-1 and 230-2.Network interface 230-1 and 230-2 for example can adopt common RJ45 interface or other network interfaces.These two network interfaces can be connected respectively on as shown in Figure 1 two the communication network NETA and NETB.

Exchanger chip 220 shown in Figure 2 can be selected the exchanger chip of arbitrary commercialization for use.General exchanger chip is all supported the port block functions, and different groupings is separate each other, thereby forms the Virtual Local Area Network of exchanger chip inside.This function is also referred to as exchanger chip and supports inner functionality of vlan.Vlan technology can be carried out logic section to the network user who is connected to exchanger chip port, is not subjected to the restriction of the network user's physical location, though shared physical equipment and physical link are arranged between the VLAN that is segmented, independent communication.Specific to exchanger chip shown in Figure 2 220, in order to realize double-network redundant, three ports of exchanger chip 220 are by two groups in minute work.First group comprises PORT2 and PORT3, forms VLAN1 thus; Second group comprises PORT3 and PORT1, forms VLAN2 thus.Though VLAN1 and VLAN2 share PORT3 like this, can communicate by letter independently of one another.Be connected respectively to also independent communication correspondingly of two network interface 230-1 of VLAN1 and VLAN2 and 230-2.Simultaneously, at the IP layer, the network interface of the ethernet controller 215 on the CPU 210 need be tied to two different IP addresses, and these two IP addresses are in the different network segments.Like this, in conjunction with two VLAN of exchanger chip 220 configuration, from network side, protective relaying device 200 can insert two independently in the communication network (as NETA and NETB) with the IP address in two different segments, thereby realizes double-network redundant.

Fig. 3 exemplarily shows the application example according to the protective relaying device of another embodiment of the utility model.The structure of protective relaying device 300 shown in Figure 3 and protective relaying device 200 shown in Figure 2 are basic identical, and identical parts have adopted identical reference marker sign, are not giving unnecessary details here.But, being different from protective relaying device 200, the exchanger chip 320 in the protective relaying device 300 illustrated in fig. 3 is also supported the broadcast storm defencive function except supporting inner functionality of vlan.That is to say exchanger chip 320 can detect broadcast storm whether occurred, and when finding broadcast storm, abandon (filtration) part broadcast data frame to a certain extent, to suppress the infringement that broadcast storm is brought.As shown in Figure 3, two of protective relaying device 300 network interface 230-1 and 230-2 are connected respectively to network N ETA for example shown in Figure 1 and NETB.In network N ETA or NETB, protective relaying device 300 can be connected to corresponding Ethernet switch 140-1 and 140-2, and independently network N ETA and NETB are connected to same server 120-1 via these two.Adopt protective relaying device 300 shown in Figure 3, not only can realize double-network redundant, can also realize that the broadcast storm in the network suppresses, thereby reduce or avoid the CPU 210 of protective relaying device to be subjected to the influence of broadcast storm.

In another example; if when protective relaying device shown in Figure 3 300 need be realized for example wall connection locking and the tripping operation of process layer, use GOOSE (Generic Object Oriented Substation Event is towards the transformer substation case of general object) function.Can send a large amount of GOOSE packets in 210 short time of CPU this moment.The GOOSE packets need sends in the redundant network each other at two.For this reason; if in two net topology structures as shown in Figure 1; CPU in the protective relaying device 130 need send a large amount of identical data to two ethernet controller Eth0 and Eth1, and this will cause CPU occupied for a long time, influence the real-time of protective relaying device.

For this reason, in a preferred embodiment, the exchanger chip 320 among Fig. 3 is also supported Tail Tag (afterbody sign) function alternatively.Support the exchanger chip of Tail Tag function can automatically identify from port PO RT3 have the ethernet frame of Tail Tag sign in postamble portion, and its two port PO RT1 and PORT2 outside two are transmitted.Like this, if CPU 210 need be with ethernet frame when two network interface 230-1 and 230-2 transmit, CPU just adds Tail Tag sign (before check field) at the afterbody of normal frame, specifically as shown in Figure 4.Support the exchanger chip of Tail Tag function after receiving that afterbody has the ethernet frame of Tail Tag sign, can identify Tail Tag sign and transmit automatically respectively at port PO RT1 and PORT2.Thus; by using the exchanger chip of supporting Tail Tag function; when under two net topology structures, sending the GOOSE data; CPU 210 only needs to send once; finish forwarding on two VLAN by exchanger chip; can significantly alleviate the load of CPU 210 with this, guarantee the real-time of protective relaying device.

Fig. 5 exemplarily show according to the protective relaying device 500 of another embodiment of the utility model with and application example.As shown in Figure 5, be integrated with two ethernet controller 215-1 and 215-2 on the CPU 510 in the protective relaying device 500, wherein ethernet controller 215-1 is connected to the PORT3 of exchanger chip 520.Two other port PO RT1 of exchanger chip 520 and PORT2 are connected respectively to two network interface 230-1 and 230-2.Similar with Fig. 2 and Fig. 3, the port PO RT3 in the exchanger chip 520 and PORT2 constitute VLAN1, and port PO RT3 and PORT1 constitute VLAN2.And the network interface of CPU 510 is tied on the IP address of two different segments.Different with Fig. 2 and Fig. 3 is that the ethernet controller 215-2 among Fig. 5 also is directly connected to the 3rd network interface 230-3.Network interface 230-3 can be connected in server TEST via an independent network N ETC, to carry out equipment debugging.Exchanger chip 520 shown in Figure 5 can also be supported broadcast storm defencive function and/or Tail Tag function.Like this, the protective relaying device 500 that Fig. 5 provides can be realized aforesaid double-network redundant communication, one of also can preferably realize in the automatic forwarding capability of broadcast storm protection and GOOSE data at least.In addition, protective relaying device 500 can also be connected to debugging server TEST by NETC, thereby realizes on-line debugging.

Be to be understood that, though this specification is described according to each embodiment, but be not that each embodiment only comprises an independently technical scheme, this narrating mode of specification only is for clarity sake, those skilled in the art should make specification as a whole, technical scheme among each embodiment also can form other execution modes that it will be appreciated by those skilled in the art that through appropriate combination.

The above only is the schematic embodiment of the utility model, is not in order to limit scope of the present utility model.Any those skilled in the art, the equivalent variations of doing under the prerequisite that does not break away from design of the present utility model and principle, modification and combination all should belong to the scope that the utility model is protected.

Claims

1. a protective relaying device that is used for digital transformer substation is characterized in that, comprising:

Processing unit (210,510) is integrated with at least one ethernet controller (215,215-1,251-2) on it, be used for sending and receiving ethernet data frame;

Exchanger chip (220,320,520), at least have first port and two or more second ports (PORT1, PORT2, PORT3), wherein first port (PORT3) is connected to the described individual ethernet controller on the described processing unit (215,215-1) that is integrated in, described first port and second port can be configured at least two VLANs (VLAN1, VLAN2), and described first port (PORT3) is shared in each of described two VLANs at least;

Two network interfaces (230-1,230-2), each network interface is connected at least one second port in the last different virtual LAN of described exchanger chip (220,320,520), and described two network interfaces are suitable for being connected respectively to first and second communication networks;

Wherein, the network interface that is connected to the ethernet controller of described exchanger chip is bundled in the IP address of different segment.

2. protective relaying device as claimed in claim 1 is characterized in that,

Described processing unit be integrated with at least two ethernet controllers (215-1,215-2);

Described protective relaying device also comprises:

The 3rd network interface (230-3), it is suitable for being connected to third communication network (NETC);

Have at least an ethernet controller (215-2) to be connected to the 3rd network interface in the described ethernet controller.

3. protective relaying device as claimed in claim 2 is characterized in that, described third communication network is used for the described protective relaying device of debugging.

4. protective relaying device as claimed in claim 1 is characterized in that, described first and second communication networks are redundant network each other.

5. protective relaying device as claimed in claim 4 is characterized in that, described first and second communication networks are the communication network between process layer and the wall.

6. protective relaying device as claimed in claim 5 is characterized in that, described first and second communication networks are the communication network between substation level and the wall.