Information and communication technology is one of the core technologies that determine the speed of construction and development of smart grids, and the demand is increasing. More and more people realize that building an intelligent and efficient power information network is the only way for the intelligent grid.
The power communication network is the “clairvoyary eye†and “shunfeng ear†of the power grid. It is not only an important guarantee for the safe and stable operation of the power grid, but also the information technology support for building a smart grid. Recently, Song Jian, a professor of electronic engineering at Tsinghua University, said in an interview with China Electric Power News: "In recent years, many new changes have taken place in the development of China's electric power industry, and corresponding new challenges have been placed on the construction of electric power communication. In the future, the construction of electric power communication will be Cloud computing, big data, Internet of Things, and even blockchain technologies are more closely integrated, not only to ensure communication needs, but also to have certain information local perception, automatic screening and processing capabilities."
In recent years, China's communication business has shown geometric growth, and the demand for power communication has become increasingly strong. The construction of smart grids puts higher demands on the carrying capacity of power communication. Smart grid construction is inseparable from power communication. With the rapid development of Internet technology, the Internet of Things is taking root in various industries of society. As a power industry that once had a strong communication technology foundation, it is at the forefront of various industries.
In terms of power consumption information collection, in the past, meter reading often required grid employees to go through house manual meter reading, which has high labor intensity, low efficiency, and is prone to problems such as wrong copying and missing copying. Nowadays, with the advent of smart meters, remote meter reading, online recharge and remote settlement have become new models, which greatly reduces the workload of grassroots employees and improves the efficiency and accuracy of the collection of electricity information.
Smart meters greatly facilitate the use of electricity information collection, but the effective operation of smart meters requires a strong, wide coverage of the power communication network support. With the rapid development of smart grid construction, the State Grid will build the largest international electricity information collection system to achieve full coverage of 395 million households. By then, a large amount of data transmission will depend on the power communication network.
In addition, the demand for power communication in the user-side demand response field is also growing. With the deepening of the construction of smart grids, in order to effectively stabilize the peak-to-valley difference of power grid load, household appliances such as air conditioners and water heaters in the future can be connected to the power communication network, and start and stop according to the real-time load of the grid.
In the field of new energy power generation, the market demand for power communication will also continue to expand. Song Jian told the China Electric Power News reporter: "As the proportion of new energy power generation in China continues to increase, the integration of new energy power generation will become an important growth segment of power communication. Due to the large dispersion of new energy power generation, unstable output, users The demand is diversified. How to coordinate various factors requires timely and effective information exchange to ensure the protection, so it is inseparable from the support of power communication technology."
The dependence of power grid monitoring and operation on power communication is also growing. With the continuous innovation of technology, new methods of power grid operation and maintenance such as drone inspection, robot overhaul, video surveillance, etc. are emerging one after another, and the sensing equipment in the power grid is also increasing. These new equipments are inseparable from power communication, and will need one in the future. Zhang's powerful power communication network ensures the normal operation of all equipment.
Song Jian also said that power grid enterprises to strengthen power communication construction, in addition to meeting their own operational needs, can also provide power customers with the required information services, which will also stimulate the development of power communications to a certain extent.
Communication and computing links are getting closerChina's power communication construction began in the 1940s, and power communication construction and power grid construction are roughly synchronized. The power communication basically follows the construction direction of the power backbone network, and the communication mode used is mainly power line carrier communication, which is used for scheduling and emergency communication of the power backbone network.
With the development of power communication technology, communication technologies such as microwave communication, optical fiber communication, mobile communication, and troposcatter communication have appeared one after another, and now wireless private network communication, active optical communication and passive optical communication have promoted China to some extent. The development of the power communication industry has improved the conditions for power communication in China. However, the focus of power communication has not changed much.
At present, the construction of China's power communication network is still mainly concentrated on the transmission side, and it is still weak on the power side. With the increasing demand for power-side power communication, the construction of power communication on the distribution and power-side side will be the focus of work in the coming period.
In addition, the combination of power communication and computing will also become a trend. Song Jian pointed out that smart grids pose new challenges to power communication technology, but also consider the relationship between communication and computing, and use artificial intelligence technology to ensure various restrictions such as given transmission delay, network capacity, network size, and data cost. Next, provide the best and best way to schedule.
With the advancement of smart grid construction, massive sensors will be widely distributed on the power grid. At that time, the reliability of power communication for data acquisition and transmission will be different from that of conventional communications. Conventional communication is communication between people and people, communication between people and things. In the future, there will be a considerable proportion of communication between objects and things. The network topology will also move from centralized to distributed, and the transmission of information will appear in a decentralized mode. It can avoid congestion and collapse of the network during peak hours.
Song Jian said that distributed means the adoption of new technologies, such as edge computing technology. Local information needs to be analyzed by certain pre-processing methods and then uploaded to the cloud. Taking new energy power generation as an example, power communication not only needs to meet the real-time monitoring of the output and operation status of new energy power generation, but also has the functions of automatic adjustment of electricity price and settlement of electricity charges in different time periods, and efficient processing of information at the collection end. .
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