In order to meet the needs of 5G+business development, the power grid has put forward high requirements for deterministic load-bearing performance, network flexibility, and reliability. SPN has end-to-end hard isolation slicing, deterministic low latency, OAM monitoring and carrier level network protection capabilities, which can meet the requirements of the future new network security isolation multi service bearer, differentiated service performance guarantee, intelligent network management and control operation and maintenance, technology and industry sustainable evolution, and become one of the key technologies matching the typical business scenario of the power industry and Digital transformation.

In order to meet the business demands and help the Digital transformation of the power grid, Yunnan Power Grid recently carried out the pilot project of SPN multi service carrying with FiberHome, focusing on multi service carrying, multi-level slicing hard pipeline isolation, small particle service access, CBR relay protection service, ultra long distance transmission and other characteristics, aiming at the needs of universal connection, large bandwidth, high reliability, Artificial Intelligence for IT Operations, fully verified the SPN slicing technology for power grid production, the ability to support multi scenario business such as office work, as well as the ability to improve the precise control level of business through SPN multi particle delay processing technology and multi particle time slot control scheduling technology. The relevant leaders and technical experts of Yunnan Power Grid highly recognized the SPN bearing solution of FiberHome, especially the multi-level slicing technology and 2M CBR relay protection service access solution.

In addition to carrying real-time and non real-time production scheduling business and production management business, Yunnan Power Grid also includes various office services. Therefore, in order to verify the reliable transmission of multi-service bearer, such as loading real comprehensive office services, scheduling simulation services, substation simulation services, power monitoring data, network management data services, station terminal services, cloud teaching voice/video services, CBR relay protection services, congestion simulation data services, etc., with a focus on verifying multi-level slicing hard pipeline isolation and small particle business access. The results show that for grid production and office scenarios, both real-time and non real-time services, bandwidth isolation, low delay, and high reliability have reached the expected level, and the latency is significantly better than the industry requirements, providing technical and quality assurance for grid digital transformation.

CBR strengthens the high safety isolation capability of power production control During the pilot process, the introduction of the 2M CBR relay protection access solution effectively strengthened the high security isolation capability of power production control business. This solution allows relay protection equipment to be directly connected to the optical port of SPN equipment, without the need to connect to photoelectric conversion equipment. It can avoid safety hazards caused by photoelectric conversion equipment failures and segmented connection of optical fibers and cables. At the same time, it can carry out integrated control, intelligent minimalist operation and maintenance, automatically calculate routes through the SPN intelligent control platform, optimize time slots through intelligent algorithms, and accurately complete the distribution of business configuration data. Directly control the access status of relay protection equipment to the line, simplify wiring, and reduce network construction and maintenance costs; Business level overlay channel level protection, coupled with expert level fault management, enables end-to-end real-time monitoring of relay protection business. Compared to packet switching and SDH transmission methods, SPN CBR service testing indicators have significantly improved, with latency reduced from milliseconds to microseconds, and bidirectional latency difference reduced from hundreds of microseconds to less than 10 microseconds.

Due to Yunnan's location on the southwestern border and the distance between substations at all levels, it is an important concern for customers to ensure the normal and reliable transmission of optical circuits in the absence of relays. FiberHome makes use of preamplifier and post amplifier to flexibly match multiple types of amplifiers by modularizing and integrating amplifiers into equipment, so as to meet the transmission of optical fiber lines with different attenuation coefficients and transmission distances, and can support transmission of lines larger than 200km. In the pilot testing, long-term reliability verification was conducted between the Lincang Boshang 550kV substation and the Nansan 220kV substation (with a fiber optic distance of 170km), and the results met expectations with sufficient redundancy to meet longer transmission distances.

The successful completion of this pilot project once again verifies that SPN has the ability to carry multiple services in the power grid, and also reflects the innovative application of the 2M CBR relay protection business carrying scheme in the industry. In the face of the digital and intelligent transformation of the power grid, FiberHome will continue to work hand in hand with power grid customers, accelerate the construction of digital and intelligent power communication networks, and connect the bright digital future.