CN103532230A - Intelligent power distribution network IEEE1588 timing synchronization system on basis of industrial Ethernet tangency access rings - Google Patents
Intelligent power distribution network IEEE1588 timing synchronization system on basis of industrial Ethernet tangency access rings Download PDFInfo
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- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
The invention relates to a power distribution network timing synchronization system, in particular to an intelligent power distribution network IEEE1588 timing synchronization system on the basis of industrial Ethernet tangency access rings. The intelligent power distribution network IEEE1588 timing synchronization system comprises a backbone layer and access layers; a backbone layer gateway exchanger is connected with a superior network transmission accurate clock device; the backbone layer gateway exchanger is connected with backbone layer exchangers by kilomega optical fiber interfaces to form a ring-shaped structure; each access layer comprises an access layer gateway exchanger connected with the backbone layer exchanger, and a plurality of access layer exchangers; each access layer gateway exchanger is connected with the corresponding access layer exchangers to form a ring-shaped structure; the backbone layer gateway exchanger and the access layer gateway exchangers are set into boundary clocks; the backbone layer exchangers and the access layer exchangers are set into transparent clocks; and power distribution terminal devices are set into common clocks. The intelligent power distribution network IEEE1588 timing synchronization system adopts a simple technology, has high time accuracy, has low dependence on a GPS (Global Positioning System), is cost-saving, has a good expansion degree, has a wide region coverage range and can meet the requirement on time synchronization of an intelligent power distribution network.
Description
Technical field
Synchro system while the present invention relates to a kind of distribution network school, particularly synchro system during a kind of intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet.
Background technology
Each backbone node timing tracking accuracy of current power transmission network has reached higher standard, and the middle pressure node time synchronization accuracy that distribution automation covers is still lower.In the construction of intelligent distribution network; the intelligent distribution network wide area observing and controlling system with synchronized phasor acquisition function is the critical support technology of intelligent distribution network; realize the technology such as intelligent distribution network safety analysis and monitoring platform construction, intelligent distribution network wide area protection and incident management, the seamless self-healing of intelligent distribution network and must allow the correcting delay precision of power distribution network reach Microsecond grade, so research has important practical significance to intelligent distribution network exact time synchronization System Construction.
The time synchronized research of current power system be take the automation of transformation substations as main, and the main technology adopting has: GPS to time, pulse per second (PPS) to time, IRIG-B code, SNTP SNTP, accurate time synchronization protocol PTP etc.Wherein GPS synchronization accuracy is high, but cost costliness is not suitable for applying in power distribution network great deal of nodes, and its stability fail safe is very unreliable yet; Pulse per second (PPS) and IRIG-B code synchronism also can reach degree of precision, but need additionally to time special circuit, cannot be applied in the distributed system that this span length of power distribution network is larger; SNTP network message synchronously to time precision can only reach ms level.IEEE1588 is again the accurate time synchronization protocol PTP of distributed control and measuring system, it wraps and at bottom, beats timestamp and come synchronizing network to reach the time precision of submicrosecond level during by school in Ethernet, this agreement can multiplexing ethernet communication network, low to resource occupation, without laying additional wires, can reduce system Construction cost.The application study of IEEE1588 in electric power system at present concentrates on automation of transformation substations field mostly, and the application in power distribution network is in the starting stage.And existing a large amount of switch product of the support IEEE1588 agreement of producer's maturation both at home and abroad.
Optical fiber communication becomes the one preferred technique of distribution network communication system with reliable and stable communication qualities such as its large capacity bandwidth, strong anti-interference ability, relatively cheap cost, low error rate, two-forty, good confidentiality.Along with rolling up of IP operation, fiber optic Ethernet technology becomes gradually one preferred technique in distribution network communication system backbone layer and Access Layer.With gigabit ethernet ring network, build power distribution automation backbone network, the scheme that builds power distribution automation Access Network with 100,000,000 Industrial Ethernet looped networks becomes the typical scenario that distribution network automated communication system is built.The present invention is basis with regard to this typical scenario, system while studying the multiplexing school based on fiber optic Ethernet technology distribution network communication system of a kind of IEEE1588 of employing.
Summary of the invention
According to above deficiency of the prior art, the problem to be solved in the present invention is: provide that a kind of technology is simple, time precision is high,, not only cost saving divergence little to GPS dependence but good, cover that region is wide, especially to adapt to Access Layer be tangent access ring structure, synchro system during the intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet that can meet that intelligent distribution network time synchronized requires.
The technical solution adopted for the present invention to solve the technical problems is:
Synchro system during the described intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet, comprise backbone layer and Access Layer, backbone layer comprises that a backbone layer closes mouth switch and a plurality of backbone layer switch, backbone layer closes mouth switch connection higher level nets biography precision clock device, backbone layer closes mouth switch and backbone layer switch is connected to form loop configuration by kilomega optic fiber interface, Access Layer comprises that an Access Layer being connected with backbone layer switch closes mouth switch and a plurality of access-layer switch, Access Layer closes the mouth switch formation loop configuration that is connected with access-layer switch, access-layer switch connects Distributing Terminal Assembly, backbone layer closes mouth switch, Access Layer critical point switch configuration is boundary clock, backbone layer switch and access-layer switch are set to transparent clock, Distributing Terminal Assembly is set to ordinary clock,
During intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet, synchronous method step is as follows:
1) backbone layer closes mouth switch and receives the clock source message of netting biography precision clock device from higher level, by being boundary clock by backbone layer critical point switch configuration, backbone layer closes after mouth switch receives higher level's time message this message is terminated, and then backbone layer closes mouth switch according to received information updating local clock;
2) backbone layer closes the local clock of mouth switch after upgrading as master clock, by master clock port, message information is sent to other the backbone layer switch being connected on backbone layer, backbone layer switch is all set to transparent clock, after receiving message information, do not upgrade the clock of self, be equivalent to directly message information is forwarded to other backbone layer switch;
3) backbone layer closes mouth switch when message information is communicated to backbone layer switch, when backbone layer closes the school of mouth switch, clock sends to Access Layer to close mouth switch through backbone layer switch, Access Layer closes after mouth switch receives message information and upgrades local clock, after the Access Layer pass mouth switch deadline is synchronous, message while being re-used as master clock high-ranking officers itself sends to other access-layer switch and the Distributing Terminal Assembly being connected with access-layer switch that are connected to Access Layer, owing to being set to self clock of the access-layer switch of transparent clock, do not upgrade, when Access Layer closes the school of mouth switch, message is equivalent to directly be forwarded to next access-layer switch and Distributing Terminal Assembly.
In the unified school in precision clock source at present, key communication looped network covers distribution main website (districts and cities control centre) and distribution substation (each transformer station), Access Layer looped network is closed on the switch of mouth switch access local communication convergent point backbone network by one of this layer, connect again other all access-layer switch and form a complete little ring, tangent with key loop, each switching station, ring main unit, distribution substation, the on-pole switch of covering communication sink accumulation.Finally formed the mechanism that IEEE1588 agreement is successively transmitted in the large ring of backbone layer and the tangent structure of a plurality of Access Layer little ring.
The present invention adopts layering principle, each communication loop (comprising the large ring of backbone layer and the little ring of Access Layer) is seen and made a clock school time domain, in each clock school time domain, select a small amount of telephone net node clock type to be set to boundary clock BC, as the master clock in the time domain of this clock school, other Node configurations are transparent clock TC, Distributing Terminal Assembly is set to ordinary clock OC, and in the time of can reaching system school like this, level quantity is few, the accumulation of error is little, circuit and the suitable effect of node load.
In the large ring of backbone layer, the telephone net node of selecting to be positioned at main website is defined as the pass mouth switch of this layer, and clock type is chosen as boundary clock BC, and other nodes are as transparent clock TC(P2P pattern).In the little ring of Access Layer, the switch being connected with backbone layer switch is defined as pass mouth switch (each tangent access ring has and closes mouth switch), and, as boundary clock BC, other telephone net nodes are as transparent clock TC(P2P pattern).Boundary clock BC node is the border of subdomain while cutting apart PTP school, it can form clear in structure, many levels clearly demarcated, relatively independent, to time process easy PTP subdomain, by last layer, be lower one deck while coming the school of one-level one-level, while finally forming a clock school, set system.The Sync message transmission cycle of each PTP subdomain is generally 2 seconds, and clocking error local in these two seconds can accumulate gradually, until upgrade next time.And lower one deck can add in the error of accumulation in local 2 seconds the error of last layer accumulation in 2 seconds, more multiple error accumulation must be more for level.Close mouth switch and be equivalent to the critical point that a clock information flows, junction at loop network and the superior and the subordinate's network is all guarded by closing mouth switch, be set to boundary clock BC, while making the school of this layer and its levels, system separates, form relatively independent PTP subdomain, the communication network of each level is whole during as a large school, by the critical point convertor boundary clock BC of this layer, go on the air while sending school and wrap, in this layer during all school information can by the error free accumulation of transparent clock TC be sent on this layer of all timing node.By critical point switch configuration, be boundary clock BC the flowing of information can also block different layers inter-stage school time, alleviated the communications burden of circuit and equipment, strengthen the stability of timing system.By this method divided clock school time domain, during school, information is delivered at district level backbone layer on its terminal equipment of 10KV distribution Access Layer and only need to passes through two-layer PTP school time domain.So both guaranteed time correction error to be controlled in minimum zone network in the time of forming again wide area multilayer that a scale can arbitrary extension and unify school.
Preferred further, backbone layer closes on mouth switch GPS device is set, and Big Dipper device is set on backbone layer switch.When backbone layer closes mouth switch cannot normally receive higher level and net the message information that passes precision clock device time, can close the GPS device arranging on mouth switch while carrying out school according to backbone layer, do not need each website to be equipped with GPS device, only need on the pass mouth switch of every layer, arrange, not only the stability of timing system can be guaranteed, the cost of timing system can also be reduced; Net the message information that passes precision clock device cannot normally receive higher level, when the GPS device of backbone layer pass mouth switch can carry out school by the Big Dipper device arranging on backbone layer switch while also breaking down, not all backbone layer switch is all provided with Big Dipper device, we can optionally arrange as required, reduce the cost of timing system.
Preferred further, Access Layer critical point switch configuration is that boundary clock is as local clock.In the time cannot normally receiving the message information of higher level's precision clock device, when the local clock that closes mouth switch by Access Layer carries out school.
Preferred further, backbone layer closes mouth switch and backbone layer switch all adopts three layers of industrial ethernet switch.Access Layer closes mouth switch and access-layer switch all adopts two layers of industrial ethernet switch.
Preferred further, backbone layer switch and access-layer switch are set to point-to-point transparent transmission mode.It is in order further to alleviate circuit and devices communicating burden that the transparent clock TC of backbone layer switch and access-layer switch is set to point-to-point (P2P) transparent clock.During point-to-point (P2P), path delay shake between neighbouring device is all recorded in node by the Timing measurement of fixed cycle, when the timestamp information of master clock transmission is delivered to from clock, whole path delay shake and the shake of switch protocol stack are all added in this master clock information, the local zone time of the Sync message that only need to receive according to oneself from clock, just can accurately calculate with the time error of master clock and adjust oneself, do not need to send again Delay-Request, Delay-Response and so on subsequent packet, be equivalent to master clock unidirectional when sending school from clock information, no longer use ping-pong procedure.E2E(is end-to-end) transparent clock is still equivalent to measure whole path delay shake with ping-pong procedure, and when network topology change (protection is switched), of short duration relatively large deviation may appear in E2E transparent clock synchronization accuracy, can cause the malfunction of protective device.
Preferred further, the clock source priority of backbone layer is followed successively by from high in the end higher level and nets and pass precision clock device, backbone layer and close GPS device on mouth switch and the Big Dipper device on backbone layer switch.The clock source priority of Access Layer is followed successively by from high in the end higher level and nets the local clock passing on precision clock device, Access Layer mouth switch.
The beneficial effect that the present invention has is:
System layering when synchro system is by rational school during the described intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet, the high effect of expansibility of network size degree while reaching school, the timing node type of choose reasonable, while reaching school, level quantity is few, accumulated error is little, circuit and node load suitably, well adapt to the effect that Access Layer is tangent access ring structure.By using multiple clock source standby, the robustness of enhancing system, in injection length source, appropriate place, make backbone layer can save a large amount of GPS correction devices, by prioritization is carried out in different clocks source, higher level's communication node clock signal is one-level, and exchange clock source, main website critical point is secondary, substation clock source is made as three grades, while making system determine a time source as master clock school all the time according to time source quality by BMC algorithm.By selecting suitable clock source decanting point, reduce district level backbone layer clock source quantity, it is boundary clock BC that Access Layer pass mouth switch is set, if Access Layer time of occurrence isolated island, the unified clock that can establish a time isolated island, reduces impact as far as possible.
Construction object of the present invention is to adopt IEEE1588 technology, multiplexing Industrial Ethernet communication system, system layering during by rational school, select suitable clock node type, one of final formation covers all distribution automation terminal nodes, higher level or local main website precision clock source are master clock, multiple clock source is standby, can transmit step by step precision clock, when switching, network redundancy automatically forms new Clock Tree, precision is better than 1 microsecond, divergence is good, network when the wide area multilayer that good adaptation Access Layer is tangent access ring structure is unified distribution network school, for intelligent distribution network wide area TT&C system construction service.
Accompanying drawing explanation
Fig. 1 is system configuration topological diagram of the present invention;
Fig. 2 is that precision clock of the present invention successively transmits schematic diagram;
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described further:
As Fig. 1, shown in Fig. 2, synchro system during the intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet of the present invention, comprise backbone layer and Access Layer, it is characterized in that: backbone layer comprises that a backbone layer closes mouth switch and a plurality of backbone layer switch, backbone layer closes mouth switch connection higher level nets biography precision clock device, backbone layer closes mouth switch and backbone layer switch is connected to form loop configuration by kilomega optic fiber interface, Access Layer comprises that an Access Layer being connected with backbone layer switch closes mouth switch and a plurality of access-layer switch, Access Layer closes the mouth switch formation loop configuration that is connected with access-layer switch, access-layer switch connects Distributing Terminal Assembly, backbone layer closes mouth switch, Access Layer critical point switch configuration is boundary clock, backbone layer switch and access-layer switch are set to transparent clock, Distributing Terminal Assembly is set to ordinary clock,
During intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet, synchronous method step is as follows:
1) backbone layer closes mouth switch and receives the clock source message of netting biography precision clock device from higher level, by being boundary clock by backbone layer critical point switch configuration, backbone layer closes after mouth switch receives higher level's time message this message is terminated, and then backbone layer closes mouth switch according to received information updating local clock;
2) backbone layer closes the local clock of mouth switch after upgrading as master clock, by master clock port, message information is sent to other the backbone layer switch being connected on backbone layer, backbone layer switch is all set to transparent clock, after receiving message information, do not upgrade the clock of self, be equivalent to directly message information is forwarded to other backbone layer switch;
3) backbone layer closes mouth switch when message information is communicated to backbone layer switch, when backbone layer closes the school of mouth switch, clock sends to Access Layer to close mouth switch through backbone layer switch, Access Layer closes after mouth switch receives message information and upgrades local clock, after the Access Layer pass mouth switch deadline is synchronous, message while being re-used as master clock high-ranking officers itself sends to other access-layer switch and the Distributing Terminal Assembly being connected with access-layer switch that are connected to Access Layer, owing to being set to self clock of the access-layer switch of transparent clock, do not upgrade, when Access Layer closes the school of mouth switch, message is equivalent to directly be forwarded to next access-layer switch and Distributing Terminal Assembly.
Wherein, backbone layer closes on mouth switch GPS device is set, and Big Dipper device is set on backbone layer switch, and Access Layer critical point switch configuration is that boundary clock is as local clock.Backbone layer closes mouth switch and backbone layer switch all adopts three layers of industrial ethernet switch, and Access Layer closes mouth switch and access-layer switch all adopts two layers of industrial ethernet switch.Backbone layer switch and access-layer switch are set to point-to-point transparent transmission mode.The clock source priority of backbone layer is followed successively by from high in the end higher level and nets and pass precision clock device, backbone layer and close GPS device on mouth switch and the Big Dipper device on backbone layer switch, and the clock source priority of Access Layer is followed successively by from high in the end higher level and nets the local clock passing on precision clock device, Access Layer mouth switch.
Operation principle:
Distribution network communication system is divided into backbone layer and Access Layer, and this is two-layer.Backbone layer communication network covers distribution main website (districts and cities control centre) and distribution substation (each transformer station).As shown in Figure 1, as backbone layer, backbone network design adopts three layers of industrial ethernet switch, by kilomega optic fiber interface, forms loop network, enables dynamic routing protocol in loop network, realizes data route and dynamically forwards.Access Layer is mainly used in the access of 10KV power distribution network terminals at different levels, covers each switching station, ring main unit, distribution substation, on-pole switch etc.Access Layer is comprised of two layers of industrial ethernet switch in each communication sink accumulation institute overlay area; according to the regional extent covering, divide different corresponding subrings; this ring is tangent access ring structure; between two layers of industrial ethernet switch in this ring, by 100,000,000 light mouths, form looped network; on three-tier switch by a Layer 2 switch (be defined as and close mouth switch) access local communication convergent point backbone network; when this structure is generally applicable to Layer 2 switch and adopts privately owned ring protection agreement, the protection switch time of its access ring can reach in 20ms.
In the large ring of backbone layer, the telephone net node of selecting to be positioned at main website is defined as the pass mouth switch of this layer, and clock type is chosen as boundary clock BC, and other nodes are as transparent clock TC(P2P pattern).In the little ring of Access Layer, select to close mouth switch as boundary clock BC, other telephone net nodes are as transparent clock TC(P2P pattern).Station exchange receive higher level net pass precision clock or GPS precision clock source signal to the local clock Jiao Shi， main website backbone switch of this node using local clock as master clock, message is sent to other switch being connected on backbone network.Because they arrange for transparent clock TC, the clock of self does not upgrade, while being equivalent to school that master clock port now sends, message arrives through transparent clock TC on the pass mouth switch of next transparent clock TC or coupled Access Layer, in the time of can completing once school to the pass mouth switch of all Access Layers during end cycle when a school of this layer.The pass mouth switch of all Access Layers has completed after time synchronized, while itself being re-used as master clock high-ranking officers, message sends to other access-layer switch of connection or the distribution terminal equipment of itself, and during this school, message arrives on next transparent clock TC or coupled Distributing Terminal Assembly through connected transparent clock TC.Clock school time domain cut apart with node configuration as shown in Figure 2, according to this, cut apart network can form a wide area multilayer and unify school with configuration mode time.
Backbone layer clock source injects the realization with redundancy: during backbone layer school, the master clock of network is that backbone layer closes the communication interface that mouth switch is connected higher level's backbone network, by this mouthful, receive higher level and net biography precision clock, local clock to this switch is synchronous, and then when all boundary clock BC of network broadcast school when connecting this layer of school.Standby clock source is be connected to the synchronous timing device of gps satellite on this pass mouth switch and be connected to the synchronous timing device of big-dipper satellite on other substation backbone layer switch of this layer.Clock source priority sets gradually respectively as higher level nets and passes precision clock, closes the GPS device on mouth switch, Big Dipper device and the local clock on the backbone switch of substation.When master clock lost efficacy, node, by BMC algorithm, automatically upgrades and is switched to secondary standby clock source, makes it become new master clock, thereby sets while forming new school.Key loop makes it at diagram logical connection place, disconnect by network management system, system while forming a tree-shaped school.
Access Layer clock source injects the realization with redundancy: during Access Layer school, the master clock of network is that the communication interface that mouth switch is connected higher level's backbone network is closed in the inside, substation, first by this mouthful, receive higher level and net biography precision clock, upgrade the local clock of switch, and then when all terminals of network are broadcasted school when connecting this layer of school.When receiving higher level, do not net while passing precision clock subnet, can form a time isolated island, because check on, mouth switch setting is for boundary clock BC, now by BMC algorithm, pass mouth switch self becomes the master clock of this time isolated island, makes the clock of all nodes of whole subnet keep relatively synchronous.Other mechanism is similar with backbone layer.
The present invention uses IEEE1588 technology, by multiplexing Industrial Ethernet communication network, system layering while using rational school, select suitable clock node type, precision clock source is successively transmitted on a large ring of backbone layer and the tangent network of the little ring of a plurality of Access Layer, cover all distribution automation terminal nodes, well adapting to Access Layer is tangent access ring structure, a precision of final formation is better than 1 microsecond, only need a small amount of accurately clock equipment, can automatically select to switch multiple redundancy clock source, synchro system when not only cost saving divergence but also good wide area multilayer are unified distribution network school.
Claims (8)
1. synchro system during an intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet, comprise backbone layer and Access Layer, it is characterized in that: backbone layer comprises that a backbone layer closes mouth switch and a plurality of backbone layer switch, backbone layer closes mouth switch connection higher level nets biography precision clock device, backbone layer closes mouth switch and backbone layer switch is connected to form loop configuration by kilomega optic fiber interface, Access Layer comprises that an Access Layer being connected with backbone layer switch closes mouth switch and a plurality of access-layer switch, Access Layer closes the mouth switch formation loop configuration that is connected with access-layer switch, access-layer switch connects Distributing Terminal Assembly, backbone layer closes mouth switch, Access Layer critical point switch configuration is boundary clock, backbone layer switch and access-layer switch are set to transparent clock, Distributing Terminal Assembly is set to ordinary clock,
During intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet, synchronous method step is as follows:
1) backbone layer closes mouth switch and receives the clock source message of netting biography precision clock device from higher level, by being boundary clock by backbone layer critical point switch configuration, backbone layer closes after mouth switch receives higher level's time message this message is terminated, and then backbone layer closes mouth switch according to received information updating local clock;
2) backbone layer closes the local clock of mouth switch after upgrading as master clock, by master clock port, message information is sent to other the backbone layer switch being connected on backbone layer, backbone layer switch is all set to transparent clock, after receiving message information, do not upgrade the clock of self, be equivalent to directly message information is forwarded to other backbone layer switch;
3) backbone layer closes mouth switch when message information is communicated to backbone layer switch, when backbone layer closes the school of mouth switch, clock sends to Access Layer to close mouth switch through backbone layer switch, Access Layer closes after mouth switch receives message information and upgrades local clock, after the Access Layer pass mouth switch deadline is synchronous, message while being re-used as master clock high-ranking officers itself sends to other access-layer switch and the Distributing Terminal Assembly being connected with access-layer switch that are connected to Access Layer, owing to being set to self clock of the access-layer switch of transparent clock, do not upgrade, when Access Layer closes the school of mouth switch, message is equivalent to directly be forwarded to next access-layer switch and Distributing Terminal Assembly.
2. synchro system during the intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet according to claim 1, is characterized in that: described backbone layer closes on mouth switch GPS device is set, and Big Dipper device is set on backbone layer switch.
3. synchro system during the intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet according to claim 1, is characterized in that: described Access Layer critical point switch configuration is that boundary clock is as local clock.
4. synchro system during the intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet according to claim 1 and 2, is characterized in that: described backbone layer closes mouth switch and backbone layer switch all adopts three layers of industrial ethernet switch.
5. synchro system during according to intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet described in claim 1 or 3, is characterized in that: described Access Layer closes mouth switch and access-layer switch all adopts two layers of industrial ethernet switch.
6. synchro system during the intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet according to claim 1, is characterized in that: described backbone layer switch and access-layer switch are set to point-to-point transparent transmission mode.
7. synchro system during the intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet according to claim 1 and 2, is characterized in that: the clock source priority of described backbone layer is followed successively by from high in the end higher level and nets and pass precision clock device, backbone layer and close GPS device on mouth switch and the Big Dipper device on backbone layer switch.
8. synchro system during according to intelligent distribution network IEEE1588 school based on the tangent access ring of Industrial Ethernet described in claim 1 or 3, is characterized in that: the clock source priority of described Access Layer is followed successively by from high in the end higher level and nets the local clock passing on precision clock device, Access Layer mouth switch.
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| CN113411155A (en) * | 2021-06-18 | 2021-09-17 | 广东电网有限责任公司 | Power distribution network clock synchronization system and method based on Ethernet transmission |
| CN114362866A (en) * | 2021-11-25 | 2022-04-15 | 北京卓越信通电子股份有限公司 | Hot standby system of time synchronization master clock of TSN network |
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| CN104301059A (en) * | 2014-03-03 | 2015-01-21 | 许继电气股份有限公司 | Intelligent substation network sampling time synchronization method |
| CN105227491A (en) * | 2015-10-21 | 2016-01-06 | 国家电网公司 | Resource regulating method in a kind of adapted electricity wireless access network |
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| CN105785119A (en) * | 2016-04-26 | 2016-07-20 | 国网冀北电力有限公司电力科学研究院 | Intelligent electric energy meter and method of utilizing Beidou satellite time service system to calibrate time automatically |
| CN110195614A (en) * | 2019-06-06 | 2019-09-03 | 平安开诚智能安全装备有限责任公司 | A kind of coal mine safety monitoring alarm control system |
| CN113411155A (en) * | 2021-06-18 | 2021-09-17 | 广东电网有限责任公司 | Power distribution network clock synchronization system and method based on Ethernet transmission |
| CN113411155B (en) * | 2021-06-18 | 2023-03-28 | 广东电网有限责任公司 | Power distribution network clock synchronization system and method based on Ethernet transmission |
| CN114362866A (en) * | 2021-11-25 | 2022-04-15 | 北京卓越信通电子股份有限公司 | Hot standby system of time synchronization master clock of TSN network |
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