Networking method of power prefecture-level data communication network based on OTN and optical fiber direct connection hybrid bearer

Abstract

The invention discloses a power prefecture-level data communication network networking method based on OTN and optical fiber direct connection hybrid bearing, and the method comprises the steps: selecting a 220kV transformer station, a county dispatching station, a local dispatching station and a standby dispatching station which are rich in optical cable resources in a prefecture region and are convenient to converge 110kV transformer station services as OTN stations, building an OTN network, enabling the OTN stations of the 220kV transformer station to be convenient for the upper connection of a county dispatching OTN device to be connected with the local dispatching station, and enabling the communication efficiency to be improved. The established OTN serves as a data communication network service and is transmitted to a local dispatching backbone convergence layer; a 220kV transformer substation with abundant optical cable resources and more 110kV stations is selected and directly connected through a 10-gigabit optical path, and the directly connected stations form a mesh network. High-end routers are configured at 220kV stations and county dispatches, and OTN coverage stations are connected with OTN equipment at the same station through 10-gigabit optical paths. The OTN serves as a transformer substation service and is connected to a ground dispatching backbone route, and the mesh network directly connected with the 10-gigabit optical fiber serves as a standby backbone route of the OTN backbone transmission network. And the non-backbone routing station and the standby backbone routing station configure middle-end routers to access backbone nodes by adopting a gigabit optical fiber.

Description

Technical Field

[0001] The present invention relates to the technical field of communication engineering design, and in particular to a method for networking a power prefecture-level data communication network based on hybrid carrying of OTN and optical fiber direct connection. Background Art

[0002] The data communication network is used by the power company to carry management information for regional services, including information intranet, administrative telephone, video, monitoring and other services, covering regional and county dispatch centers and 220kV substations, 110kV substations, 35kV substations, directly affiliated units, power supply stations and distribution stations. At present, the regional data communication network covers sites equipped with mid-end routers, and directly affiliated units, power supply stations and distribution stations are equipped with switches to access substations, and each site uses optical fiber Gigabit direct access to the nearest site.

[0003] The new power system will accelerate the digital transformation of power grid companies, especially the types and quantity of business terminals connected to data communication networks in substations and distribution stations will be further expanded, and the bandwidth demand for data communication networks will be greatly increased. The direct use of gigabit optical paths in backbone aggregation nodes can no longer meet the business access needs. At the same time, in the case of emergency dispatch, the path for large-bandwidth services such as regional site video of county-level companies to access the regional county dispatch center is long and the delay is large, which cannot meet the emergency needs of command and dispatch. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a method for networking a power city-level data communication network based on hybrid bearer of OTN and optical fiber direct connection.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for networking a power city-level data communication network based on hybrid bearer of OTN and optical fiber direct connection, comprising:

[0006] The OTN network is established by selecting 220kV substations, county dispatching stations, local dispatching stations and backup dispatching stations with abundant optical cable resources in the prefecture-level cities and convenient for gathering 110kV substation services as OTN sites;

[0007] The OTN site of the 220kV substation should be convenient for the county dispatching OTN equipment to be connected to the local dispatching. The built OTN network is used as the backbone aggregation layer for data communication network services to be transmitted to the local dispatching.

[0008] Select 220kV substations with abundant optical cable resources and more downstream 110kV stations to use 10G optical fiber direct connection. The stations directly connected by 10G optical fiber form a mesh network.

[0009] High-end routers are deployed at the above-mentioned 220kV sites and county dispatching stations. The high-end routers at sites covered by OTN also use 10G optical paths to interconnect with OTN equipment at the same site.

[0010] The OTN network is used as the backbone route for substation services to connect to the ground dispatching station, and the mesh network with 10G optical fiber is used as the backup backbone route of the OTN backbone transmission network;

[0011] The mid-range routers configured at the sites of non-backbone routing and backup backbone routing use gigabit optical fiber to directly access the backbone nodes.

[0012] As a possible implementation method, further, by selecting 220kV substations, county-level dispatching centers, regional dispatching centers, and standby dispatching centers with abundant optical cable resources in prefecture-level cities and convenient for aggregating 110kV substation services as OTN sites, an OTN network is established, specifically:

[0013] An OTN network is established by selecting cities with more than 3 OPGWs and more than 20 sites (including substations, power supply stations, and distribution stations) with a voltage level of 110kV or below nearby, and uploading services to the 220kV substations, county dispatching stations, local dispatching stations, and backup dispatching stations (to prevent local dispatching stations from being unable to dispatch, and to serve as backup dispatching centers for local dispatching stations) that are passed through in the route of the power control center as OTN sites.

[0014] As a possible implementation method, further, 220kV substations with abundant optical cable resources and more downstream 110kV sites are selected to adopt 10G optical fiber direct connection, and the sites directly connected by 10G optical fiber form a mesh network, specifically:

[0015] Select sites with more than 3 OPGWs and more than 20 nearby sites with voltage levels of 110kV and below (including substations, power supply stations, and distribution stations). The services are uploaded to the 220kV substations (including sites covered by OTN) passed through in the route of the power control center. The sites directly connected by 10G optical fiber are connected by 10G optical fiber to form a mesh network.

[0016] As a possible implementation manner, further, the high-end router is a router that can provide a 10 Gigabit optical path; and the mid-end router is a router that can provide a 1 Gigabit optical path.

[0017] As a possible implementation mode, further, the method for establishing a power city-level data communication network based on hybrid bearer of OTN and optical fiber direct connection specifically includes:

[0018] 1) Construction of OTN backbone aggregation layer;

[0019] 2) Construction of 10G optical fiber direct connection backup backbone aggregation layer;

[0020] 3) Access layer networking and service transmission routing.

[0021] As a possible implementation method, further, the construction of the OTN backbone convergence layer specifically includes:

[0022] 1.1): OTN site selection

[0023] Select local dispatch, standby dispatch, county dispatch, 220kV sites with more than 3 OPGWs and convenient for service access of site in the county dispatch area, and sites with more than 3 OPGWs and more than 20 nearby sites with voltage levels of 110kV and below (including substations, power supply stations, and distribution stations) to upload services to the 220kV substations passed by in the route of the power control center;

[0024] 1.2): OTN equipment configuration

[0025] Each of the above-mentioned sites, including the local dispatching, standby dispatching and 220kV sites, is equipped with one set of N*10G OTN equipment. The number of N is determined according to the number of site scales and business types in the prefecture-level cities.

[0026] 1.3): OTN backbone aggregation layer networking

[0027] The county dispatching system is first connected to the nearest 220kV substation; according to the business flow, the county dispatching system gathers the substations within the county and the internal business of the county dispatching system to the local dispatching system and the backup dispatching system.

[0028] As a possible implementation, further, in step 1.2), the ground dispatching, standby dispatching and 220kV sites are configured with 40-wavelength 10G OTN equipment; the county dispatching is configured with 1 set of 8*10G OTN.

[0029] As a possible implementation method, further, in step 1.3), the county dispatcher is connected to the nearest 220kV substation via two optical paths, and each optical path is allocated with four wave channels, which are respectively connected to the ground dispatcher and the backup dispatcher; the entire aggregation layer 220kV substation, ground dispatcher and backup dispatcher form a ring.

[0030] As a possible implementation method, further, the construction of the 10G optical fiber direct connection backup backbone aggregation layer specifically includes:

[0031] 2.1) Site selection

[0032] Select OTN equipment configuration sites, 220kV sites with more than 3 OPGWs to facilitate the aggregation layer 10G network as a mesh network;

[0033] 2.2) Equipment Configuration

[0034] Two high-end routers are configured for each of the local dispatch and county dispatch. If other 220kV aggregation sites play the same function as the county dispatch (i.e., they aggregate more 220kV, 110kV, and 35kV services, and currently a county usually covers 20 to 35 sites, this can be used as a judgment), then two high-end routers are configured, and the remaining sites are configured with one high-end router; sites configured with two routers are important sites, and the two devices serve as backup for each other;

[0035] 2.3) Backup backbone aggregation layer

[0036] The two devices in the county dispatch and the local dispatch (if there are two devices in the 220kV substation, it is also included) are interconnected by 10G optical paths in the station; the two devices in the county dispatch are directly connected to the nearest 220kV substation through optical fiber using 10G optical paths; the local dispatch and the backup dispatch use two optical paths through different optical cables to interconnect by 10G. The entire aggregation layer adopts a mesh network structure.

[0037] As a possible implementation method, further, in the access layer networking and service transmission routing, the aggregation sites that do not belong to the above are classified as the access layer. Each site in the access layer is equipped with a mid-end router. The router uses a gigabit optical path to access other substations nearby according to the site optical cable conditions. The access layer site services are aggregated by the county dispatcher and then transmitted to the local dispatcher and backup dispatcher.

[0038] The beneficial effects of the present invention are:

[0039] By establishing an OTN transmission backbone route, the present invention can directly open an optical channel to the regional dispatch center through the OTN network, which can achieve short latency and large bandwidth for county-level regional business access to the regional dispatch center, meeting the emergency command needs. At the same time, the establishment of a mesh network backup backbone route with 10G direct optical fiber connection can be used as a disaster recovery channel for the OTN network, greatly improving the reliability of business transmission, and actively promoting the safety construction of digital substations and new power systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of OTN networking;

[0041] Figure 2 This is a schematic diagram of the aggregation layer network of high-end routers;

[0042] Figure 3 This is a schematic diagram of the main channel transmission;

[0043] Figure 4 This is a transmission diagram of backup channel 1;

[0044] Figure 5 This is a transmission diagram for backup channel 2. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] See attached Figure 1 As shown, this embodiment provides a method for networking a power city-level data communication network based on hybrid bearer of OTN (Optical Transport Network) and optical fiber direct connection, including:

[0047] First, select more than 3 OPGWs (Optical Fiber Composite Overhead Ground Wires) in the prefecture-level city area and more than 20 sites (including substations, power stations, and distribution stations) with a voltage level of 110kV or below nearby to upload services to the 220kV substation, the power county dispatching center (hereinafter referred to as the county dispatching center, which is the dispatching center of the power company that manages the substations and power stations in the county), the power regional dispatching center (hereinafter referred to as the local dispatching center, which is the dispatching center of the power company that manages the substations and power stations in the entire prefecture-level city) and the backup dispatching center (to prevent the local dispatching center from being unable to dispatch, and serve as a backup dispatching center for the local dispatching center) as OTN sites to establish an OTN network;

[0048] The OTN site of the 220kV substation should be convenient for the county dispatching OTN equipment to be connected to the local dispatching. The built OTN network is used as a data communication network service to transmit to the backbone aggregation layer of the local dispatching; then select sites with more than 3 OPGWs and more than 20 nearby sites with a voltage level of 110kV and below (including substations, power supply stations, and distribution stations) to upload services to the power control center. The 220kV substations (including sites covered by OTN) passed through in the route are directly connected by 10 Gigabit optical fiber. Considering the robustness of the network, the sites directly connected by 10 Gigabit optical fiber form a mesh network.

[0049] High-end routers (routers that can provide 10G optical paths) are configured at the above-mentioned 220kV sites and county dispatching stations. The high-end routers at sites covered by OTN also use 10G optical paths to interconnect with OTN equipment at the same site. The OTN network serves as the backbone route for substation services to connect to the ground dispatching station, and the mesh network of 10G optical paths directly serves as the backup backbone route for the OTN backbone transmission network.

[0050] The sites of non-backbone routing and backup backbone routing are equipped with mid-range routers (routers that can provide Gigabit optical paths) that use Gigabit optical paths to directly access the backbone nodes.

[0051] By establishing OTN transmission backbone routing, the county dispatch can directly open an optical channel to the regional dispatch center through the OTN network, which can achieve short latency and large bandwidth for county-level regional business access to the regional dispatch center, meeting the needs of emergency command. At the same time, the establishment of a mesh network backup backbone routing with 10G direct optical fiber connection can be used as a disaster recovery channel for the OTN network, greatly improving the reliability of business transmission and actively promoting the safety construction of digital substations and new power systems.

[0052] The networking method of the electric power municipal data communication network based on the hybrid bearer of OTN and optical fiber direct connection mainly includes the following aspects:

[0053] 1) Construction of OTN backbone aggregation layer

[0054] 1.1) OTN site selection

[0055] Select local dispatching, backup dispatching, county dispatching, 220kV sites with more than 3 OPGWs and convenient for access to county dispatching area site services, and sites with more than 3 OPGWs and more than 20 nearby sites with a voltage level of 110kV and below (including substations, power supply stations, and distribution stations) to upload services to the 220kV substations passed through in the route of the power control center.

[0056] 1.2) OTN equipment configuration

[0057] At the above-mentioned sites, one set of N*10G OTN equipment is configured for each of the ground dispatching, backup dispatching and 220kV sites. The number of N is determined according to the scale of the sites in the cities and the classification of the business types. The more sites covered in the cities, the more 220kV sites are gathered, and the more channels the OTN ring passes through; the larger the business bandwidth and the finer the classification, the more channels there are. Usually, 40-wavelength 10G OTN equipment can be configured for ground dispatching, backup dispatching and 220kV sites, that is, 40*10G OTN equipment can meet the requirements. County dispatching generally configures one set of 8*10G OTN to meet the requirements.

[0058] 1.3) OTN backbone aggregation layer networking

[0059] County dispatch is usually located in the urban area, far from the ground dispatch, and needs to be connected to the nearest 220kV substation first. According to the business flow, the county dispatch needs to gather the substations in the county and the internal business of the county dispatch to the ground dispatch and backup dispatch. Therefore, the county dispatch is connected to the nearest 220kV substation on two optical paths, and each optical path is allocated 4 wave channels, which are respectively sent to the ground dispatch and backup dispatch. To improve reliability, the entire aggregation layer 220kV substation, ground dispatch and backup dispatch form a ring, as shown in the attached figure. Figure 1 shown.

[0060] 2) Construction of 10G optical fiber direct connection backup backbone aggregation layer

[0061] 2.1) Site selection

[0062] The 220kV site with OTN equipment configuration and abundant optical cable resources (i.e., more than 3 OPGWs) should be selected to facilitate the aggregation layer 10G network to form a mesh network.

[0063] 2.2) Equipment Configuration

[0064] The local dispatch and county dispatch are each equipped with 2 high-end routers. If other 220kV aggregation sites have the same function as the county dispatch (i.e., they aggregate more 220kV, 110kV, and 35kV services, and currently a county usually covers 20 to 35 sites, which can be used as a judgment), they are equipped with 2 high-end routers, and the remaining sites are equipped with 1 high-end router. For important sites equipped with 2 routers, since there are many aggregated services, the two devices serve as backup for each other to improve reliability.

[0065] 2.3) Backup backbone aggregation layer

[0066] The two devices in the county dispatch and the local dispatch (if there are two devices in the 220kV substation, it is also included) are interconnected by 10G optical paths. The two devices in the county dispatch are connected to the nearest 220kV substation through optical fiber. The local dispatch and the backup dispatch use two optical paths through different optical cables to interconnect by 10G. The entire aggregation layer adopts a mesh network structure. Figure 2 shown.

[0067] 3) Access layer networking and service transmission routing

[0068] The above-mentioned aggregation sites are classified as access layers. Each site in the access layer is equipped with a mid-range router. The router uses a gigabit optical path to access other substations nearby according to the site optical cable conditions. The services of access layer sites in a certain county are aggregated by the county dispatch and then transmitted to the ground dispatch and backup dispatch. The present invention proposes to use the OTN transmission channel as the first backbone route channel for transmission from the service site to the ground dispatch, taking the 110kV H substation in the county dispatch area a as an example.

[0069] 3.1) Main channel (such as attached Figure 3 (shown)

[0070] To ground channel:

[0071] 110kV H substation ~ directly connected to the optical path via Gigabit optical fiber ~ county dispatching high-end router 1 ~ 10G optical path within the station ~ county dispatching OTN equipment ~ and then enter the corresponding 10G channel after channel division ~ 220kV substation A ~ OTN channel direct connection ~ ground dispatching.

[0072] To the standby channel:

[0073] 110kV H substation ~ via Gigabit optical fiber direct connection optical path ~ county dispatching high-end router 1 ~ 10 Gigabit optical fiber direct connection optical path ~ county dispatching high-end router 2 ~ 10 Gigabit optical path within the station ~ county dispatching OTN equipment ~ and then enter the corresponding 10 Gigabit channel after channel division ~ 220kV substation A ~ OTN channel direct connection ~ 220kV substation B ~ OTN channel direct connection ~ 220kV substation C ~ OTN channel direct connection ~ 220kV substation D ~ OTN channel direct connection ~ 220kV substation E ~ OTN channel direct connection ~ 220kV substation F ~ OTN channel direct connection ~ 220kV substation G ~ OTN channel direct connection ~ standby dispatching.

[0074] 3.2) Spare channel 1 (if attached Figure 4 (shown)

[0075] Since the OTN site is equipped with a single device, it is necessary to prevent the OTN device failure from affecting the connection of the county's services to the local dispatch. When the county dispatch's OTN device fails, the county dispatch's high-end router directly connects to the nearest 220kV substation through 10G optical fiber, and then transmits the data to the local dispatch and backup dispatch through the 220kV substation via the OTN network. Take the 110kV H substation in the county dispatch area a as an example.

[0076] To ground channel:

[0077] 110kV H substation ~ via Gigabit optical path ~ County dispatch high-end router 1 ~ 10G optical fiber direct connection optical path ~ County dispatch high-end router 2 ~ 10G optical fiber direct connection optical path ~ 220kV substation A high-end router ~ 10G optical fiber in the station ~ 220kV substation A ~ OTN channel direct connection ~ ground dispatch

[0078] To the standby channel:

[0079] 110kV H substation ~ via Gigabit optical path ~ county dispatching high-end router 1 ~ 10 Gigabit optical fiber direct connection optical path ~ county dispatching high-end router 2 ~ 10 Gigabit optical fiber direct connection optical path ~ 220kV substation A high-end router ~ 10,000 Gigabit optical fiber direct connection optical path within the station ~ 220kV substation A ~ OTN channel direct connection ~ 220kV substation B ~ OTN channel direct connection ~ 220kV substation C ~ OTN channel direct connection ~ 220kV substation D ~ OTN channel direct connection ~ 220kV substation E ~ OTN channel direct connection ~ 220kV substation F ~ OTN channel direct connection ~ 220kV substation G ~ OTN channel direct connection ~ standby dispatching.

[0080] 3.3) Spare channel 2 (if attached Figure 5 (shown)

[0081] When the entire OTN network cannot transmit, it is transmitted to the ground dispatch and backup dispatch via the backbone aggregation layer directly connected by 10G optical fiber. Take the 110kV H substation in the county dispatch area a as an example.

[0082] To ground channel:

[0083] 110kV H substation ~ via Gigabit optical path ~ County dispatch high-end router 1 ~ 10G optical fiber direct connection optical path ~ ~ 220kV substation 1 ~ 10G optical fiber direct connection optical path ~ Ground dispatch

[0084] To the standby channel:

[0085] 110kV H substation ~ via Gigabit optical path ~ county dispatch high-end router 1 ~ 10 Gigabit optical fiber direct connection optical path ~ county dispatch high-end router 2 ~ 10 Gigabit optical fiber direct connection optical path ~ 220kV substation A high-end router ~ 10 Gigabit optical fiber direct connection optical path ~ 220kV substation C ~ 10 Gigabit optical fiber direct connection optical path ~ 220kV substation 3 ~ 10 Gigabit optical fiber direct connection optical path ~ 220kV substation D ~ 10 Gigabit optical fiber direct connection optical path ~ 220kV substation E ~ 10 Gigabit optical fiber direct connection optical path ~ 220kV substation 4 ~ 10 Gigabit optical fiber direct connection optical path ~ 220kV substation F ~ 10 Gigabit optical fiber direct connection optical path ~ 220kV substation G ~ standby dispatch.

[0086] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for establishing a power city-level data communication network based on hybrid bearer of OTN and optical fiber direct connection, characterized in that: include: The OTN network is established by selecting 220kV substations, county dispatching stations, local dispatching stations and backup dispatching stations with abundant optical cable resources in the prefecture-level cities and convenient for gathering 110kV substation services as OTN sites; The OTN site of the 220kV substation should be convenient for the county dispatching OTN equipment to be connected to the local dispatching. The built OTN network is used as the backbone aggregation layer for data communication network services to be transmitted to the local dispatching. Select 220kV substations with abundant optical cable resources and more downstream 110kV stations to use 10G optical fiber direct connection. The stations directly connected by 10G optical fiber form a mesh network. High-end routers are deployed at the above-mentioned 220kV sites and county dispatching stations. The high-end routers at sites covered by OTN also use 10G optical paths to interconnect with OTN equipment at the same site. The OTN network is used as the backbone route for substation services to connect to the ground dispatching station, and the mesh network with 10G optical fiber is used as the backup backbone route of the OTN backbone transmission network; The mid-range routers configured at the sites of non-backbone routing and backup backbone routing use gigabit optical fiber to directly access the backbone nodes.

2. The method for establishing a power city-level data communication network based on hybrid bearer of OTN and optical fiber direct connection according to claim 1 is characterized in that: The OTN network is established by selecting 220kV substations, county-level dispatching centers, regional dispatching centers, and backup dispatching centers with abundant optical cable resources in prefecture-level cities and convenient for gathering 110kV substation services as OTN sites. Specifically: An OTN network is established by selecting 220kV substations, county dispatchers, local dispatchers and backup dispatchers in the route of the power control center with more than 3 OPGWs in the prefecture-level cities and more than 20 sites with voltage levels of 110kV and below nearby as OTN sites for uploading services.

3. The method for establishing a power city-level data communication network based on hybrid bearer of OTN and optical fiber direct connection according to claim 1 is characterized in that: Select 220kV substations with abundant optical cable resources and more 110kV stations to use 10G optical fiber direct connection. The stations directly connected by 10G optical fiber form a mesh network, specifically: Select sites with more than 3 OPGWs and more than 20 nearby sites with voltage levels of 110kV and below to upload their services to the 220kV substations passed through in the route of the power control center, which are directly connected by 10G optical fiber. The sites directly connected by 10G optical fiber form a mesh network.

4. The method for establishing a power city-level data communication network based on hybrid bearer of OTN and optical fiber direct connection according to claim 1 is characterized in that: The high-end router is a router that can provide a 10 Gigabit optical path; the mid-end router is a router that can provide a 1 Gigabit optical path.

5. The method for establishing a power city-level data communication network based on hybrid bearer of OTN and optical fiber direct connection according to claim 1 is characterized in that: Specifically include: 1) Construction of OTN backbone aggregation layer; 2) Construction of 10G optical fiber direct connection backup backbone aggregation layer; 3) Access layer networking and service transmission routing.

6. The method for establishing a power city-level data communication network based on hybrid bearer of OTN and optical fiber direct connection according to claim 1, characterized in that: The construction of OTN backbone aggregation layer includes: 1.1): OTN site selection Select local dispatch, standby dispatch, county dispatch, 220kV sites with more than 3 OPGWs and convenient for site services in the county dispatch area, and sites with more than 3 OPGWs and more than 20 nearby 110kV and below voltage levels to upload services to the 220kV substations passed through in the route of the power control center; 1.2): OTN equipment configuration Each of the above-mentioned sites, including the local dispatching, standby dispatching and 220kV sites, is equipped with one set of N*10G OTN equipment. The number of N is determined according to the number of site scales and business types in the prefecture-level cities. 1.3): OTN backbone aggregation layer networking The county dispatching system is first connected to the nearest 220kV substation; according to the business flow, the county dispatching system gathers the substations within the county and the internal business of the county dispatching system to the local dispatching system and the backup dispatching system.

7. The method for establishing a power city-level data communication network based on hybrid bearer of OTN and optical fiber direct connection according to claim 1, characterized in that: Step 1.2) The local dispatching, backup dispatching and 220kV sites are equipped with 40-wave 10G OTN equipment; the county dispatching is equipped with 1 set of 8*10G OTN.

8. The method for establishing a power city-level data communication network based on hybrid bearer of OTN and optical fiber direct connection according to claim 1 is characterized in that: Step 1.3) The county dispatcher is connected to the nearest 220kV substation via 2 optical paths. Each optical path is allocated 4 wave channels, which are respectively connected to the ground dispatcher and the backup dispatcher. The entire aggregation layer 220kV substation, ground dispatcher and backup dispatcher form a ring.

9. The method for establishing a power city-level data communication network based on hybrid bearer of OTN and optical fiber direct connection according to claim 1, characterized in that: The construction of the 10G optical fiber direct connection backup backbone aggregation layer specifically includes: 2.1) Site selection Select OTN equipment configuration sites, 220kV sites with more than 3 OPGWs to facilitate the aggregation layer 10G network as a mesh network; 2.2) Equipment Configuration The local dispatch and county dispatch are each equipped with 2 high-end routers. If other 220kV aggregation sites have the same function as the county dispatch, they are equipped with 2 high-end routers. The remaining sites are equipped with 1 high-end router. Sites equipped with 2 routers are important sites, and the two devices serve as backup for each other. 2.3) Backup backbone aggregation layer The two devices in the county dispatching station and the local dispatching station are interconnected by 10 Gigabit optical paths; the two devices in the county dispatching station are directly connected to the nearest 220kV substation via 10 Gigabit optical paths through optical fibers; the local dispatching station and the backup dispatching station are interconnected by 10 Gigabit using two optical paths through different optical cables; the entire aggregation layer is networked using a mesh network structure.

10. The method for establishing a power city-level data communication network based on hybrid bearer of OTN and optical fiber direct connection according to claim 1, characterized in that: In the access layer networking and service transmission routing, the aggregation sites that do not belong to the above are classified as the access layer. Each site in the access layer is equipped with a mid-range router. The router uses a gigabit optical path to access other substations nearby according to the site optical cable conditions. The access layer site services are aggregated by the county dispatch and then transmitted to the local dispatch and backup dispatch.

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