Distribution network more intelligent trend development

"Based on the physical entity of distribution network and distribution network automation, the integration of sensor measurement, operation control, information communication and other technologies supports the friendly access and demand interaction of distributed power supply, micro-grid, energy storage, and electric vehicles, which is the connotation of the current intelligent distribution network." The most basic work of intelligent distribution network is the acquisition and management of data, and high-quality data can obtain accurate perception and control of distribution network system and equipment status." Dong Xuzhu, chief engineer of the Southern Power Grid Scientific Research Institute and special expert of the national "Thousand Talents Plan", said.

Improving data quality is an eternal topic of distribution network intelligence. Only the real-time monitoring of the reliability of the power supply of the distribution network can realize fault warning, analysis and decision-making, achieve the purpose of self-prevention and self-recovery of the power grid, and achieve the optimal operation of the power grid.

Interactivity puts higher demands on data acquisition

In recent years, with the acceleration of the process of re-electrification, the high proportion of new energy access, the large-scale application of energy storage, and the deep integration of digital technology and power grid technology, the physical characteristics, operation mode, and functional form of the power grid are undergoing profound changes. Accelerating the construction of an energy Internet with a strong smart grid as the core and a new generation of power system as the basis is an urgent need to improve the efficiency of energy resource allocation.

Especially with the acceleration of electric power reform and new urbanization and agricultural modernization, the rapid development of new energy, distributed power supply, electric vehicles, energy storage devices, the terminal power load shows a new trend of rapid growth, large changes, and diversification, and the investment focus of the future power grid will gradually turn to the intelligent power grid and the construction of the distribution network, more biased to the distribution and power side. This also brings opportunities for transmission and distribution equipment enterprises, especially those with primary and secondary equipment integration.

"The interaction between the grid and the user has been greatly enhanced, the user is only the receiver and user of electric energy in the traditional mode, but with the development of demand response, smart home and distributed power supply, the future electric energy and the information flow with it will flow bidirectional between the grid and the user, which requires the grid to become more flexible, controllable and measurable." Based on data analysis and modeling, our system protection laboratory realizes physical hardware simulation of primary and secondary systems in the loop, which strongly supports the research and development of core technologies, equipment and personnel training of China's power safety production regulation and operation." Nanrui Group stable company deputy general manager Li Wei said.

In fact, intelligent data analysis and management of distribution network is the key. In recent years, China is strengthening the research and construction of intelligent data collection and processing of distribution network, and has also made some gratifying achievements. For example, not long ago, a new generation of distribution automation main station system was put into operation in Changzhou, Jiangsu Province. The master station system has achieved technological breakthroughs in real-time data processing from millions to tens of millions, from single I-zone collection to multi-zone and multi-source data collection, and from centralized application service to massive data platform service architecture, meeting the dual business requirements of operation monitoring and status management of distribution network.

The new generation of distribution automation master station system is like installing "clairvoyant" and "nerve center" for distribution network dispatching. Through real-time big data acquisition and analysis, it allows the distribution network to be monitored in real time like the main network. Whether it is daily operation monitoring, scheduling operation or fault handling, it can quickly and accurately switch the operation mode of the power grid, isolate the fault outage area, and significantly improve the reliability of power supply in an all-round way.

In the future, advanced technologies such as artificial intelligence will be incorporated

With the continuous improvement of the practical level of advanced information and communication technology, the future distribution network will become a dynamic, efficient, convenient and interactive super architecture network that can be used for real-time information and power exchange. Information and communication technology will effectively connect the power supply and customer needs, comprehensively utilize a variety of communication methods to achieve effective and reliable information transmission, establish a panoramic real-time and seamless exchange data model of the distribution network, achieve highly reliable and real-time communication, and ensure the correlation, cooperation and interaction between the distribution network and customers at all levels.