CN115883485B - IEEE802.1Qbv-based substation communication network flow scheduling method - Google Patents
IEEE802.1Qbv-based substation communication network flow scheduling method Download PDFInfo
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- CN115883485B CN115883485B CN202211493613.4A CN202211493613A CN115883485B CN 115883485 B CN115883485 B CN 115883485B CN 202211493613 A CN202211493613 A CN 202211493613A CN 115883485 B CN115883485 B CN 115883485B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
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- Y04S10/16—Electric power substations
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Abstract
The invention discloses a substation communication network flow scheduling method based on IEEE802.1Qbv, which comprises the following steps of determining the priority of message transmission according to the transmission requirement of a substation communication network service message defined by IEC 61850; configuring a TSN switch gating control list, and setting a protection window and a GCL cycle period according to the transmission frequency of SV messages and the forwarding time of a switch; setting time required by the exchanger to forward the maximum message according to the length of each message forwarded by the port and setting a protecting band in front of the protecting window; setting a free transmission window, and conforming to a priority scheduling strategy; the GCL set by the next hop switch is delayed by a time interval according to the transmission path of the SV message. The invention adopts the substation communication network flow scheduling method based on IEEE802.1Qbv, solves the problem of uncertainty of real-time performance of the common network transmission of all the services of the substation communication network under the condition of large flow, improves the real-time performance of the key service flow transmission, and simplifies the network structure.
Description
Technical Field
The invention relates to the technical field of power communication network data traffic scheduling, in particular to a substation communication network traffic scheduling method based on IEEE802.1 Qbv.
Background
In recent years, in order to meet the real-Time requirements of modern industries on data transmission, researchers at home and abroad try to improve the real-Time performance of data transmission by adopting technologies such as TTEthernet, flexRay, time-sensitive network (Time-Sensitive Networking, TSN) and the like. The TSN is out of the stock in an Ethernet protocol system and consists of a group of IEEE protocols, so that networking is facilitated in the existing Ethernet. Compared with the traditional Ethernet, the TSN has the capabilities of data traffic shaping, scheduling, time synchronization and the like, and can effectively improve the QoS of time-sensitive service transmission, so that the TSN technology is widely applied to a plurality of fields such as industrial Internet, aviation, medical treatment, internet of vehicles and the like.
The transformer substation is a key node for energy conversion of the power system. The substation automation system is dedicated to monitoring, controlling and protecting primary devices in the substation and its associated feeder. With popularization and application of the IEC61850 standard, a substation automation system increasingly depends on a substation communication network (Substation Communication Network, SCN) to realize monitoring, control and protection functions. Along with the continuous improvement of the intelligent degree of the transformer substation, the contradiction between the increase of the data traffic in the transformer substation communication network and the transmission demand of key control business data is also becoming prominent, and at this moment, the traditional Ethernet can not meet the demand of intelligent transformer substation communication, so that the introduction of new technology is needed to ensure the real-time performance of the transmission of the key control business data of the transformer substation.
Disclosure of Invention
The invention aims to provide a substation communication network flow scheduling method based on IEEE802.1Qbv, which solves the problem of uncertainty of real-time performance of the common network transmission of all services of a substation communication network under the condition of large flow, improves the real-time performance of key service flow transmission and simplifies the network structure.
In order to achieve the above purpose, the present invention provides a substation communication network traffic scheduling method based on ieee802.1qbv, which includes the following steps:
step S1: determining the priority of message transmission according to the transmission requirement of the communication network service message of the transformer substation defined by IEC 61850;
step S2: configuring a TSN switch gating control list, and setting a protection window and a GCL cycle period according to the transmission frequency of SV messages and the forwarding time of a switch;
step S3: setting time required by the exchanger to forward the maximum message according to the length of each message forwarded by the port and setting a protecting band in front of the protecting window;
step S4: setting a free transmission window, and conforming to a strict priority scheduling strategy;
step S5: the GCL set by the next hop switch is delayed by a time interval according to the transmission path of the SV message.
Preferably, the service message attribute in step S1 mainly includes a message length, a periodicity, and a sending frequency.
Preferably, in step S2, the GCL cycle period is set to be the transmission period T of the SV message GCL As shown in the formula (1),
T GCL ＝T SV (1)
wherein: t (T) SV The maximum length of the SV message;
length T of protection window PW As shown in formula (2);
wherein: l (L) SV The maximum length of the SV message; c is the switch port forwarding rate.
Preferably, in step S3, the guard band length T GB The result is obtained by the following method,
wherein: l (L) max The maximum length of all messages forwarded for the switch port.
Preferably, the time interval Δt in step S5 is equal to the time required for the switch to forward the SV message.
Wherein: l (L) SV The maximum length of the SV message; c is the switch port forwarding rate.
Therefore, the substation communication network flow scheduling method based on IEEE802.1Qbv has the following beneficial effects:
(1) The enhanced traffic scheduling IEEE802.1Qbv protocol of the TSN is adopted, so that the transmission requirements of various service messages of a substation communication network are integrated, the ultra-low time delay and ultra-low jitter transmission basis of key service traffic are ensured, and the real-time requirements of other service traffic transmission are met;
(2) The method solves the problem of uncertainty of real-time performance of the common network transmission of each service of the substation communication network under the condition of large flow, improves the real-time performance of the transmission of key service flow and simplifies the network structure.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
Fig. 1 is a schematic distribution diagram of an embodiment of a substation communication network flow scheduling method based on ieee802.1qbv of the present invention;
fig. 2 is a bus protection network connection model in an embodiment of a substation communication network flow scheduling method based on ieee802.1 qbv;
FIG. 3 is a flow chart of a method for dispatching the flow of the substation communication network based on IEEE802.1 Qbv;
fig. 4 is a schematic diagram of a TSN switch according to an embodiment of the present invention, which is a method for dispatching traffic in a substation communication network based on ieee802.1 qbv.
Detailed Description
Examples
The flow scheduling method is based on the principle that a protection bandwidth is reserved for a periodic sampling value SV message, and low-delay zero-jitter transmission of the SV message is guaranteed. The residual bandwidth guarantees the low-delay transmission of other time sensitive services according to the scheduling transmission rule of strict priority, and the allocation principle is shown in figure 1.
Fig. 2 is a diagram of a TSN network model in the present embodiment, which uses a TSN network composed of three terminals and one TSN switch as shown in fig. 2.
As shown in fig. 3, the invention provides a substation communication network flow scheduling method based on ieee802.1qbv, which comprises the following steps:
step S1: and determining the priority of message transmission according to the transmission requirements of all service messages of the transformer substation communication network defined by IEC 61850.
The service message attribute mainly comprises three parts, namely the length, the periodicity and the sending frequency of the message. The real-time requirements of the messages of the transformer substation communication network defined by the message transmission requirements with reference to the IEC61850 standard are shown in the table 1:
TABLE 1
And according to the requirements of different messages on transmission delay, high priority is allocated to the high delay requirement, and low priority is allocated to the low delay requirement.
The sending frequency and size of each message and the assigned priority in this embodiment are shown in table 2.
TABLE 2
Step S2: the TSN switch gating control list is configured, a protection window and a GCL cycle period are set according to the transmission frequency of the SV message and the switch forwarding time, the length of the protection window is set to 25 mu s, and the GCL cycle period is set to 250 mu s in the embodiment.
Step S3: according to the length of each message forwarded by the port, setting the time required by the exchanger to forward the maximum message and setting a protection band in front of the protection window, wherein the length of the protection band is 22.4 mu s in the embodiment.
Step S4: and setting a free transmission window except a protection window and a protection band, and conforming to a strict priority scheduling strategy.
The implementation of the free transmission window is realized by opening all the gates except the gate of the priority queue corresponding to the protection window, and the GCL is 01111111. The buffered data in the different priority queues follow a strict priority scheduling policy.
Step S5: according to the transmission path of the SV message, the GCL set by the next hop switch is delayed by a time interval, and the delayed time interval is equal to the time required by the switch to forward the SV message. The GCL latency of the next hop switch in this embodiment is 20 mus.
And calculating the delay boundary of the next message transmission of the flow scheduling method by using a network calculation method. The delay boundary distribution of each packet is shown in table 3:
TABLE 3 Table 3
Therefore, the invention adopts the substation communication network flow scheduling method based on IEEE802.1Qbv, solves the problem of uncertainty of real-time performance of the common network transmission of all the services of the substation communication network under the condition of large flow, improves the real-time performance of the transmission of key service flow, and simplifies the network structure.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.
Claims (4)
1. The substation communication network flow scheduling method based on the IEEE802.1Qbv is characterized by comprising the following steps of:
step S1: determining the priority of message transmission according to the transmission requirement of the communication network service message of the transformer substation defined by IEC 61850;
step S2: configuring a TSN switch gating control list, and setting a protection window and a GCL cycle period according to the transmission frequency of SV messages and the forwarding time of a switch;
wherein the set GCL cycle period is the transmission period TGCL of the SV message, as shown in the following formula,
T GCL ＝T SV
wherein: TSV is the maximum length of SV message;
the length TPW of the protection window is shown in the following formula,
wherein: LSV is the maximum length of SV message; c is the port forwarding rate of the exchanger;
step S3: according to the length of each message forwarded by the port, setting the time required by the switch to forward the message and setting a protection belt in front of the protection window;
step S4: setting a free transmission window, and conforming to a priority scheduling strategy;
step S5: the GCL set by the next hop switch is delayed by a time interval according to the transmission path of the SV message.
2. The substation communication network traffic scheduling method based on ieee802.1qbv according to claim 1, wherein: the service message attribute in step S1 includes the length, periodicity and sending frequency of the message.
3. The substation communication network traffic scheduling method based on ieee802.1qbv according to claim 1, wherein: in step S3, the guard band length TGB is obtained by the following equation,
wherein: lmax is the maximum length of all messages forwarded by the switch port.
4. The substation communication network traffic scheduling method based on ieee802.1qbv according to claim 1, wherein: the time interval Δt in step S5 is equal to the time required for the switch to forward the SV message,
wherein: LSV is the maximum length of SV message; c is the switch port forwarding rate.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111385225A (en) * | 2018-12-28 | 2020-07-07 | 中兴通讯股份有限公司 | Data scheduling method, computer device and computer readable storage medium |
| CN113068263A (en) * | 2021-03-26 | 2021-07-02 | 鹏城实验室 | Time slot scheduling method for time-sensitive network, terminal and storage medium |
| CN114389946A (en) * | 2022-02-14 | 2022-04-22 | 重庆邮电大学 | Network configuration management method for TSN switch |
| CN114531404A (en) * | 2022-03-17 | 2022-05-24 | 华北电力大学 | Intelligent substation switch flow scheduling method and system based on TSN |
| CN114819591A (en) * | 2022-04-20 | 2022-07-29 | 国网浙江省电力有限公司 | Power demand response potential evaluation method, system and related equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9608926B2 (en) * | 2014-08-29 | 2017-03-28 | Cisco Technology, Inc. | Flexible recirculation bandwidth management |
| US10805222B2 (en) * | 2017-05-01 | 2020-10-13 | General Electric Company | Resilient network configuration for time sensitive traffic |
| JP6376229B2 (en) * | 2017-02-09 | 2018-08-22 | オムロン株式会社 | COMMUNICATION SYSTEM, COMMUNICATION DEVICE, AND COMMUNICATION METHOD |
| CN111010351B (en) * | 2019-12-10 | 2024-03-08 | 新奥数能科技有限公司 | Internet of things data transmission method and system |
| CN111669339B (en) * | 2020-05-25 | 2022-02-15 | 武汉大学 | Intelligent energy station control layer service priority division and PDWRR queue scheduling method |
-
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- 2022-11-25 CN CN202211493613.4A patent/CN115883485B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111385225A (en) * | 2018-12-28 | 2020-07-07 | 中兴通讯股份有限公司 | Data scheduling method, computer device and computer readable storage medium |
| CN113068263A (en) * | 2021-03-26 | 2021-07-02 | 鹏城实验室 | Time slot scheduling method for time-sensitive network, terminal and storage medium |
| CN114389946A (en) * | 2022-02-14 | 2022-04-22 | 重庆邮电大学 | Network configuration management method for TSN switch |
| CN114531404A (en) * | 2022-03-17 | 2022-05-24 | 华北电力大学 | Intelligent substation switch flow scheduling method and system based on TSN |
| CN114819591A (en) * | 2022-04-20 | 2022-07-29 | 国网浙江省电力有限公司 | Power demand response potential evaluation method, system and related equipment |
Non-Patent Citations (1)
| Title |
|---|
| 无线传感器网络的研究进展;李建中;高宏;;计算机研究与发展(第01期);第3-17页 * |
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