CN107124345A - A kind of intelligent substation GOOSE network system based on EtherCAT - Google Patents
A kind of intelligent substation GOOSE network system based on EtherCAT Download PDFInfo
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- CN107124345A CN107124345A CN201710435480.8A CN201710435480A CN107124345A CN 107124345 A CN107124345 A CN 107124345A CN 201710435480 A CN201710435480 A CN 201710435480A CN 107124345 A CN107124345 A CN 107124345A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
- H04L12/423—Loop networks with centralised control, e.g. polling
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Abstract
A kind of intelligent substation GOOSE network system based on EtherCAT, including EtherCAT main websites and EtherCAT slave stations；The EtherCAT slave stations are intelligent electronic device in all stations, including combining unit, intelligent terminal and measure and control device.The EtherCAT main websites are dedicated network communication equipment；The EtherCAT slave stations, in addition to the set function of intelligent electronic device is realized, embed one piece of ESC board, while realizing network service.There is inventive network system principal and subordinate's station equipment in reliable topological structure, GOOSE network typically to be provided with two Ethernet physical interfaces, and network uses ring topology, and the hub-and-spoke configuration of relatively existing GOOSE network, reliability is higher；In GOOSE network of the present invention without interchanger, cpu performance require it is low, without special physical layer port, substantial amounts of hardware resource in network can be saved.
Description
Technical field
The present invention relates to a kind of intelligent substation GOOSE network system system based on EtherCAT, belong to intelligent substation net
Network transmission technique field.
Background technology
GOOSE (transformer substation case of general object-oriented) network be transformer station process layer in be used for transmit breaker tripping and closing
The network of the important informations such as order, the position of the switch and device connection locking, its reliability is with real-time for intelligent substation safety
Stable operation is significant.Existing GOOSE network is used as information based on switching Ethernet technology by the use of interchanger
Interactive core, reliability and the real-time of network are limited by interchanger quantity and performance, and when interchanger is broadcasted
During storm, the real-time of network will drastically decline and may trigger substation safety production accident, generally speaking, current GOOSE
Network is primarily present following two problems：
1st, it is in existing GOOSE network to use hub-and-spoke configuration in terms of reliability more, can only be by increasing interchanger in network
Quantity realizes the redundant of network communication link, and the realization of this kind of redundant network structure needs interchanger quantity more, cost
It is higher, and due in GOOSE network propagation data it is less, cause communication link utilization rate in such redundant network very low, it is another
The redundancy of aspect communication link will increase the data processing load of intelligent electronic device in network, influence its core control function
Realize.
2nd, in terms of real-time, IEC61850 stipulations have bright to the propagation delay time upper limit of different types of data in GOOSE network
Really provide, because existing GOOSE network is using interchanger as core, data transmission delay is with interchanger quantity and equipment in network
The increase of quantity and increase, so for ensure networked-induced delay, the scale of existing GOOSE network is by a definite limitation.The opposing party
In face, switching Ethernet to use multicast message, once occurring broadcast storm, networked-induced delay will can significantly decline more.
The content of the invention
The purpose of the present invention is, in order to which GOOSE network topological structure is changed into the higher full-annular type of reliability from star-like, together
The number of link in network and node is reduced Deng under the conditions of, network reliability and real-time is greatly improved, the present invention discloses one kind
Intelligent substation GOOSE network system based on EtherCAT.
Realize that technical scheme is as follows, a kind of intelligent substation GOOSE network system based on EtherCAT, bag
Include EtherCAT main websites and EtherCAT slave stations；The EtherCAT slave stations are intelligent electronic device in all stations, including are merged
Unit, intelligent terminal and measure and control device.
The EtherCAT main websites are dedicated network communication equipment；The EtherCAT slave stations, except realizing that smart electronicses set
Outside standby set function, one piece of ESC board is embedded, i.e. EtherCAT is from station control, while realizing network service.
The EtherCAT main websites respectively have with EtherCAT slave station equipments to be adopted between two commodity ethernet COM1s, port
All devices are connected into a ring network with optical fiber.
GOOSE network communicates mechanism as shown in Fig. 2 network uses ring topology, and is " MS master-slave " communication pattern.
During network service, downlink message is sent by EtherCAT main websites, message is passed back by up again after all EtherCAT slave stations
To EtherCAT main websites, a complete cycle period is constituted, EtherCAT main websites are can uniquely to excite message transmissions in network
Equipment, EtherCAT slave stations can only modify to corresponding data segments in message.
EtherCAT messages in network include EtherCAT headings and slave station data segments two parts, each slave station data
Each slave station equipment of section correspondence.When network service starts, main website sends descending report to neighbouring slave station (the first intelligent electronic device)
Text, neighbouring slave station is received after message, reads the area's data of data 1, and according to slave station equipment functional requirement, the data read out are entered
Row modification, writes the area of data 1, then by EtherCAT message transmissions to next slave station (the second smart electronicses again after the completion of modification
Equipment), the slave station carries out data renewal to the area of data 2 on demand, is E-Packeted again after the completion of renewal to other slave stations,
EtherCAT messages downlink transfer successively in this order, until transmitting into network last slave station, then will be disposed
The up reverse transfer successively of message goes back to main website.
EtherCAT main websites as network service maincenter equipment, after a cycle period terminates, in uplink message
Appearance is focused on, and analyzes the data content that each equipment updates in corresponding data area, and according to content requirements are updated, next
Modified in the downlink message of cycle period.For example：Assuming that the first intelligent electronic device is measure and control device, the n-th smart electronicses
Equipment is intelligent terminal, is required according to operation of power networks, and measure and control device need to send tripping operation GOOSE information to intelligent terminal, it is desirable to its
Breaker is controlled to complete trip operation, in first cycle period, measure and control device will tripping operation GOOSE information write-ins EtherCAT
The area of data 1 in message, EtherCAT messages uplink is returned after main website, and tripping operation GOOSE information is copied to data n by main website
Area, in second cycle period, intelligent terminal reads data n areas content, and controls breaker to complete trip operation.
In GOOSE network based on EtherCAT, when data transmission delay depends on the cycle period of network, slave station transmission
Prolong and two slave stations between position relationship, can be estimated by following formula：
TEtherCAT(a,b)=T+ (b-a) * Tslave+Tphy；
In formula, a, b number for slave station, and represent the relative distance value of the slave station and main website, such as main website downlink transfer
The relative distance value of 1st slave station is 1；TEtherCAT(a,b)Represent that data are transmitted to slave station b time delay by slave station a；Tslave tables
Show slave station equipment propagation delay time；T represents EtherCAT cycle period；TphY represents the overall delay of transmission medium in network.
The cycle period T of EtherCAT network depends on EtherCAT agreements in itself, and T is generally in existing protocol version
1ms, and the data transmission delay of EtherCAT slave station equipments depends on the hardware of slave station equipment data link layer, generally fixes
1us.Because network is transmitted using optical fiber, therefore medium propagation delay time is generally ns ranks, can be ignored.
From the foregoing, it will be observed that all data transmission delays are essentially 1ms or so in the GOOSE network based on EtherCAT, and
IEC61850 is 3ms to the minimum upper limit of GOOSE network propagation delay time in intelligent substation, and GOOSE network of the present invention is real-time
Property aspect it is with the obvious advantage.
The beneficial effects of the invention are as follows inventive network system has remarkable real-time performance, the circulating cycle of GOOSE network
Phase mechanism can reduce equipment cpu load, and improve the utilization rate of transmission medium, greatly shorten data transmission delay, meanwhile, net
Interchanger need not be used in network as the relaying of message transmissions, it is to avoid ports competition, network storm will not be produced；The present invention
There is network system principal and subordinate's station equipment in reliable topological structure, GOOSE network typically to be provided with two Ethernet physical interfaces,
Network uses ring topology, and the hub-and-spoke configuration of relatively existing GOOSE network, redundancy is bigger, and reliability is higher；The present invention
Network system cost is low, easily realizes, in GOOSE network without interchanger, cpu performance require it is low, without special physical layer port
The features such as can save substantial amounts of hardware resource in network, so as to reduce the networking cost of network, compatible traditional ethernet physical layer
And network port quantity it is few the features such as make it that EtherCAT networkings are convenient and are easily achieved.
Brief description of the drawings
Fig. 1 is the GOOSE network structure chart of the invention based on EtherCAT；
Fig. 2 is GOOSE network of the present invention communication mechanism figure；
Fig. 3 is certain 220KV intelligent substation GOOSE network topology diagram；
Fig. 4 is certain 220KV intelligent substation GOOSE network topology diagram.
Embodiment
The embodiment of the present invention is as depicted in figs. 1 and 2.
A kind of intelligent substation GOOSE network system based on EtherCAT of the present embodiment, including EtherCAT main websites and
EtherCAT slave stations；The EtherCAT slave stations are intelligent electronic device in all stations, including combining unit, intelligent terminal and survey
Control device.
The present invention illustrates the GOOSE nets based on EtherCAT by taking the 220kV GOOSE networks in certain intelligent substation as an example
Network networking process.The intelligent substation uses double bus scheme mode, equipped with 220kV outlets 4 times.Process-level network is used
GOOSE network and SV networks separate the mode of independence networking, and its 220kV GOOSE network topological structure is as shown in Figure 3.
Introduce after EtherCAT, the interchanger in former GOOSE network can all remove, retain 36 smart electronicses and set
Standby, each intelligent electronic device inserts ESC boards, and increases by one for configuring the EtherCAT master with monitoring network communications
Stand, the network topology structure after restructuring is as shown in Figure 4.
Claims (4)
1. a kind of intelligent substation GOOSE network system based on EtherCAT, it is characterised in that the system includes
EtherCAT main websites and EtherCAT slave stations；The EtherCAT slave stations are intelligent electronic device in all stations, including merge single
Member, intelligent terminal and measure and control device；
The EtherCAT main websites are dedicated network communication equipment；The EtherCAT slave stations, except realizing intelligent electronic device both
Determine outside function, embed one piece of ESC board, i.e. EtherCAT is from station control, while realizing network service.
2. a kind of intelligent substation GOOSE network system based on EtherCAT according to claim 1, its feature exists
In the EtherCAT main websites respectively have with EtherCAT slave station equipments uses light between two commodity ethernet COM1s, port
All devices are connected into a ring network by fibre.
3. a kind of intelligent substation GOOSE network system based on EtherCAT according to claim 2, its feature exists
In the network uses ring topology, and is " MS master-slave " communication pattern；During network service, sent by EtherCAT main websites
Downlink message, message pass through it is up again after all EtherCAT slave stations be transmitted back to EtherCAT main websites, constitute one it is complete
Cycle period, EtherCAT main websites are can uniquely to excite the equipment of message transmissions in network, and EtherCAT slave stations can only be to message
In corresponding data segments modify.
4. a kind of intelligent substation GOOSE network system based on EtherCAT, it is characterised in that in the GOOSE network, number
The position relationship depended on according to propagation delay time between cycle period, slave station propagation delay time and two slave stations of network, can be by following formula
Estimation：TEtherCAT(a,b)=T+ (b-a) * Tslave+Tphy；
In formula, a, b number for slave station, and represent the relative distance value of the slave station and main website, the 1st of such as main website downlink transfer
The relative distance value of slave station is 1；TEtherCAT(a,b)Represent that data are transmitted to slave station b time delay by slave station a；TslaveRepresent that slave station is set
Standby propagation delay time；T represents EtherCAT cycle period；TphyRepresent the overall delay of transmission medium in network.
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| CN201710435480.8A CN107124345A (en) | 2017-06-11 | 2017-06-11 | A kind of intelligent substation GOOSE network system based on EtherCAT |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325019A (en) * | 2011-08-23 | 2012-01-18 | 西安电子科技大学 | Clock synchronization method of real-time industrial Ethernet EtherCAT redundant system |
| CN105450489A (en) * | 2015-12-02 | 2016-03-30 | 大连理工计算机控制工程有限公司 | HEBus efficient fieldbus system for preferably realizing shortest message in output and communication method |
| CN105591855A (en) * | 2016-02-01 | 2016-05-18 | 哈尔滨工业大学 | Force sensor data collection system and method based on EtherCAT |
| CN106254274A (en) * | 2016-09-27 | 2016-12-21 | 国家电网公司 | Transformer station's switch GOOSE message transmission reduces the method that the end of a thread blocks |
-
2017
- 2017-06-11 CN CN201710435480.8A patent/CN107124345A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325019A (en) * | 2011-08-23 | 2012-01-18 | 西安电子科技大学 | Clock synchronization method of real-time industrial Ethernet EtherCAT redundant system |
| CN105450489A (en) * | 2015-12-02 | 2016-03-30 | 大连理工计算机控制工程有限公司 | HEBus efficient fieldbus system for preferably realizing shortest message in output and communication method |
| CN105591855A (en) * | 2016-02-01 | 2016-05-18 | 哈尔滨工业大学 | Force sensor data collection system and method based on EtherCAT |
| CN106254274A (en) * | 2016-09-27 | 2016-12-21 | 国家电网公司 | Transformer station's switch GOOSE message transmission reduces the method that the end of a thread blocks |
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