In 2020, China's energy consumption generated carbon dioxide emissions, the power industry accounted for about 42.5% of the total carbon dioxide emissions of the energy industry, the power industry carbon peak and carbon neutrality progress will directly affect the entire carbon peak and carbon neutrality goal realization process. Therefore, large-scale access to new energy, limit the total amount of fossil energy, and build a new power system with new energy as the main body are necessary means to achieve a clean, low-carbon, safe and efficient energy system.
In the new power system, power supply, power grid, energy storage and load (source network and load storage) are coupled with each other, so the analysis of power system must be transformed from isolated analysis to collaborative analysis of each link. Therefore, the construction of digital power grid, the form with data as the core factors of production, to promote energy, wind energy, solar energy and other energy flow and composed the depth of the flow of information data fusion, open source web storage each link, realize the energy grid synergistic interaction, is the country's carbon power system peak, carbon neutral target an effective way to provide active support.
In-depth development of power grid digitalization will vigorously promote the construction of new power system: on the one hand, digital power grid will make data acquisition terminals more and more in number and type, and make the data greatly increase in number and type. At the same time, the barriers between various cross-domain and cross-business data systems are gradually broken, and the data sharing between different data systems provides a broad data foundation for cross-domain and cross-business data analysis. On the other hand, the construction of digital power grid will lead to more efficient data processing technology. The development of edge computing, cloud computing, artificial intelligence and other new-generation digital technologies will provide more powerful technical support for different scenes, different fields and different businesses in the new power system.
In this context, how to effectively obtain a large amount of data, and make correlation and comprehensive analysis of it, to achieve accurate, unified and comprehensive perception of various scenes in each link of the new power system (namely, data fusion), is an important means for the power grid to be observable, measurable and controllable.
Data fusion in the new power system mainly includes three key steps: first, at the data acquisition level, a large amount of data is collected through the extensive deployment of small and micro sensors, chip-based intelligent terminals and intelligent gateways to provide an effective data basis for the overall perception of the power grid; Second, in data processing, by giving full play to data fusion technology, fully mining the correlation between data, realizing the supplement and enhancement of data, enhancing the ability of interconnection and comprehensive perception of everything in the new power system; Thirdly, data application can accelerate the realization of comprehensive transparency of power grid status, equipment status, transaction status and management status through data sharing between cross-field and cross-business data systems.
In the new power system, data fusion is conducive to the accurate perception of the target, so as to realize the comprehensive observability of the power grid. Accurate and measurable: the information represented by a single data is limited, which limits the accuracy of target perception to a certain extent. Data fusion achieves accurate and measurable perceived targets by complementing and enhancing data. Highly controllable: The overall visibility and accuracy of the perceived target make the target more "transparent", which is conducive to the realization of its highly controllable.
In the new power system, data fusion is conducive to realizing the synergy of all links of source network and load storage, so as to coordinate the relationship between new energy and power security: Wind and other new energy power generation has a strong randomness, volatility and intermittency, under the current technical conditions may appear because of its volatility caused by the lack of power support capacity, and new energy power generation is relatively fragile to extreme weather tolerance. Through the coordinated operation between power grid and new energy, data fusion enables the power grid to take corresponding measures in time to cope with the instability of new energy and ensure the continuous and stable output of electricity. Coordinate the relationship between new energy and power grid security: in the new power system, all links of source network and load storage are highly electronic, and the power grid will present new dynamic characteristics such as low rotational inertia and wide-band oscillation, making the stability of the power system more complex. Data fusion can accurately grasp the operation characteristics of the new power system through the fusion of multiple energy sources. The relationship between new energy and electricity supply economy should be well coordinated: the energy density of new energy is low, the annual utilization hours of power generation is low, and the large new energy base is usually far away from the load center. In order to guarantee the grid-connected consumption of a high proportion of new energy, the system security and reliable power supply, the overall construction and operation cost of new power system will rise. Data fusion promotes cost reduction and efficiency improvement on the power supply side and energy saving and efficiency improvement on the user side by coordinating the relationship between reliable and safe power supply of the system and economy, and combining with the trend analysis of electricity price.
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 the official website of Guodian Zhongxing: www.whxsn.com
