One of the most typical characteristics of the new power system is that new energy will occupy a dominant position in the power supply structure. With the extensive access of new energy, its randomness, intermittence and fluctuation will put forward higher requirements for the flexible and controllable power grid. Based on this, as another typical feature of the new power system, digital power grid has sufficient necessity and inevitability, and will become the best form of the new power system. Number assigned to a new type of power system data will be the core factors of production, through "source - net - load - store" each link information, using huge amounts of data analysis and high performance computing technology, through the data relationships found power grid operation rule and potential risks, make the power grid has strong awareness, wisdom, decision-making ability and the ability to execute quickly, Further ensure the safe and stable operation of the power system, help to achieve a wide range of optimal allocation of resources.
First, digital power grid takes data as the core technology architecture to enable the construction of new power system
From the perspective of data access, the new power system will realize multi-mode sensor measurement data access, effectively support multi-dimensional real-time status monitoring of new energy power generation, improve the level of power grid transparency, and provide a more comprehensive and accurate data basis for accurate power prediction on the power generation side. Small and micro sensing and chip intelligent terminal will give the power grid more powerful edge perception and control ability, relying on edge computing to further meet the functional requirements of automatic power generation control, fast frequency response and other functions, to achieve the "comprehensive, accurate and measurable, highly controllable" generation side of new energy. At the same time, the construction of the Internet of Things platform will support the unified access and management of massive terminal data, and realize second-level convergence in the cloud data center, providing standardized data sources for subsequent "brains" on the cloud.
From the perspective of data analysis, traditional power analysis methods, such as basic electromechanical model and equation of state, are no longer suitable for complex networks and electromagnetic transient processes that are more difficult to grasp after a large number of new energy sources are connected. Relying on the advanced computing technology oriented to big data in cloud computing and edge computing, it will help the model analysis of ten million dimensions in the future, and achieve fast and efficient new power system analysis; In addition, digital power grid will gradually explore the operation rules of power grid through data relations based on comprehensive, accurate and transparent mass data collection, and timely discover and warn power grid risks, forming a "cloud-side coordination" control system, supporting tens of thousands of new energy equipment as the main power supply to participate in the power system control process. Lay the key foundation for the power system to fully absorb new energy and ensure energy supply and security.
From the perspective of data decision-making, relying on cutting-edge AI technologies such as knowledge graph and reinforcement learning, it provides high-precision regional load prediction and new power system cognitive services, and supports auxiliary decision-making functions such as intelligent power outage planning and scheduling and intelligent error prevention under the new energy structure. At present, the power dispatching control Center of Guangxi Power Grid Corporation has carried out relevant research on automatic duty intelligent voice assistant technology based on dispatching AI cognitive service. Model training based on a variety of information of the power system can support the search and recommendation function of conventional problems and the analysis and calculation function of the system, enrich the interactive means of the system, provide the basis for analysis and decision, and improve the operability of the power grid operation system. At the same time, the new generation of digital technology will help to build a digital twin power grid covering the whole process and link of power grid, realize the rapid preview, verification and intelligent decision of power grid failure, while fully absorbing new energy, further guarantee the safety and anti-impact ability of power grid, and support the dynamic balance of supply and demand.
Second, the next key work direction of digital grid bearing new power system construction
First, continuously improve the access of intelligent terminals on the power generation side of new energy, and further deepen the upgrade of digital power grid infrastructure. Compared with the traditional physical power grid, the advanced sensing measurement brought by the extensive deployment of smart terminals is the basic condition for the construction of digital power grid, and the advanced communication transmission channel with 5G as the core technology is the necessary guarantee to promote the intelligent control system of "cloud edge fusion". Therefore, to speed up the small micro sensor, chips and other technology research, advancing the height of the grid, a secondary equipment digitization, build the edge of the new type of power system computing cluster, is the foundation of digital power grid load new power system, in order to meet the 2025 years ago have to support the new energy, new power of 100 million kw or more access given ability overall goals.
Second, we will continue to promote research on cutting-edge technologies such as "moving knowledge from things to things", and develop high-performance software that can adapt to the new power system dominated by new energy. With the continuous development of informatization and digitization technology, it has become the consensus of digital power grid construction to realize the core functions of power grid through cloud data storage, big data processing, artificial intelligence algorithm and other cutting-edge technologies. However, large-scale grid in new energy, new power system marketization, differentiation system synergy demand increase, more users such as background, the development to adapt to the new type of power system, relying on advanced technology to support the dispatching operation and management of high-performance software, fully meet the demand of power system analysis of the high degree of uncertainty, will become the important direction of further research.
Third, promote the multi-dimensional integrated development of the digital energy industry and accelerate the construction of an energy-conserving society. To implement the national strategy of "double carbon", the integrated development of the power industry and all disciplines is an indispensable and important link. On the basis of access to the data of various industries, the comprehensive feature vector is constructed to explore accurate and efficient calculation methods. Actively integrate cutting-edge scientific and technological achievements and innovation achievements in other fields, seek new solutions and optimal models in new energy development and energy consumption services, and further improve the safety, reliability, green and intelligent level of power grid.
Three, endnotes
In a word, as the "main force" in China's energy revolution, digital power grid is the best form of new power system with new energy as the main body. It is of great significance to promote the transformation and upgrading of the energy industry, build a clean, low-carbon, safe and efficient new energy system, and ultimately achieve the goal of carbon peak and carbon neutrality.
Wuhan Xinshengneng is a professional power testing equipment manufacturer. We pay close attention to the development and trends of power grid related industries. For more information, visit our official website: www.whxsn.com
