"The application of a cost-effective and flexible flexible wireless broadband private network (referred to as "wireless private network") intelligent solution in the distribution of electricity to meet the growing demand for grid business and performance has become an important part of smart grid construction." In the global wireless private network intelligent solution market for more than 20 years, Xu Tingguang, director of the marketing department of Hainengda Communication Co., Ltd. (referred to as “Haiengdaâ€), who has mastered 118 wireless LTE technology innovation patents, told the China Electric Power News reporter. The wireless private network intelligent solution is the key link to connect the grid information and realize the intelligent function of the grid. In order to effectively build a strong smart grid, the future wireless private network intelligent solution needs to achieve "comprehensive integration, intelligent decision-making, smooth evolution, multi-mode intelligence", and a new generation of "integrated networking" solutions can better achieve the above requirements. .
"With the further development of smart grid construction, its development focus is towards the development of intelligent power." Xu Tingguang said that the best way to build intelligent power distribution is to apply wireless private network intelligent solutions.
In fact, the program has been widely used in intelligent power grids such as power generation, transmission, and distribution. To a certain extent, the research and development of advanced and perfect wireless private network intelligent solutions has become the primary content and core link of intelligent distribution of electricity.
Previously, the distribution of electricity was mainly based on the wireless public network solution for information connection. Such a scheme has problems such as unstable system, small available bandwidth, large data transmission delay, poor network manageability, and poor security. The wireless private network intelligent solution can guarantee the user to occupy the entire bandwidth of the communication system, and can control and effectively manage the network in real time, and can organically integrate the security solutions of the power industry. It is currently building a high-speed, reliable and flexible smart grid. It is one of the best solutions to solve the full coverage and full acquisition of the power side.
The "integrated networking" solution will open a new era of smart grid constructionAll along, the wireless private network intelligent solution mainly uses LTE technology products based on 230M and 1.8G frequency bands, and LTE is its current mainstream application technology.
"In the past two years, the power industry has extensively tested and tested the 1.8G band LTE technology equipment in the power distribution phase." Xu Tingguang said, however, due to policy issues of frequency band sharing, it is difficult for power users to obtain the right to use the band. At the same time, its frequency band is high, the coverage of the base station is small, and the networking cost is relatively high. At present, the promotion of intelligent solutions with this technology as the core has slowed down significantly.
In recent years, the industry's call for LTE technology in the 230M band is getting higher and higher. Previously, the National Radio Management Committee ("National No Commission") allocated 40 frequency points and 1 mega comb frequency to the power industry in the 230M frequency band, which maximized the power user's unique right to use the frequency band. Since the beginning of this year, the state has no committee to actively support the grid companies to properly apply more idle 230M frequency band according to local conditions, in order to obtain greater throughput demand. The LTE technology in the 230M band will usher in a new round of development opportunities. The frequency band is lower, the coverage of the base station is large, and the networking cost is low, which has become the best choice for the intelligent intelligent networking.
“When the new round of 230M and 1.8G LTE technology development and deployment was carried out in the industry, Hainengda proposed a 230M LTE+1.8GLTE wide and narrowband smart convergence private network solution for the characteristics of the power grid.†Xu Tingguang introduced the solution It has been recognized by the industry and the academic community. Many industry experts believe that the program will promote the construction of smart grids to open a new era of "integrated networking". By leveraging the respective advantages of 230M and 1.8G LTE technologies in the distribution of power, it is expected to accelerate the construction of a stronger and stronger smart grid.
"Converged networking" solution still needs to overcome related problemsThe "converged networking" solution can maximize the advantages of the LTE technologies in the 230M and 1.8G bands and the convenience of unified management.
"The so-called convergence, the first is the fusion of 1.8G broadband data and 230M narrowband data." Xu Tingguang said that in practical applications, the main city can use 1.8G LTE network load signal better terminal services, and the remaining services can use 230M LTE network load, And the large bandwidth of the 1.8G frequency band is used as the return channel. In the suburbs or rural areas, all 230M LTE network load services can be used. This has achieved full coverage of the key areas and full coverage of data services with the intelligent construction of electricity. Then, the voice service and the data service are integrated, which can provide data services with different bandwidths and voice services for command and scheduling.
“Unified management refers to the integration between the central side and the terminal side.†In this solution, the two networks of wide and narrow bands can share a core network, network management and cluster scheduling system. The terminal has both wide and narrowband data and voice clusters. Features. In this way, it is possible to construct a wireless private network covering urban areas, suburbs and rural areas in the most economical way, and realize the functions of “three remotesâ€, collection, mining, and load control for distribution network automation.
The technical complexity of the "converged networking" solution is very large. "General enterprises usually only have broadband or narrowband technology, and the barrier between wide and narrowband technology is almost impossible to cross." Xu Tingguang said that since its inception, Hainengda has mastered the most advanced in the industry in the field of broadband and narrowband. With technology, solutions and application experience, it has become the only company in the world that can provide “integrated networking†solutions.
In the face of this worldwide achievement, he admits that the "converged networking" solution still has technical difficulties. For example, the solution is very different from the traditional 1.8G LTE technology solution in terms of network element functions. Deep integration and unified management of base stations and terminals are a difficult problem to be solved.
Xu Tingguang revealed that Hainengda is expected to officially release the solution by the end of this year. At present, it is in-depth discussions with relevant scientific research institutions and integrators in the industry to improve the technical details of the program.
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