In energy policy, technology, corporate strategy, user demand change, under the influence of factors such as comprehensive distribution system and power system development faces many of the new situation, constantly enrich system form elements and system integration to enhance development trend, the traditional management way challenges, system operation control mode needs to change, with the electric system from tradition to the new with electrical system upgrade.
System evolution and upgrading will include physical form and operational form.
At the level of physical form: first, the system develops from passive network to active network. With the development of distributed power supply and user-side integrated energy system, power distribution system will develop from traditional passive network to active network, and the specific forms of source will be further enriched.
The second is the diversified development of power load types. Driven by policies such as power substitution and clean energy consumption, the types of user-side load equipment are more diversified. At the same time, with the new load access, the system will have more flexible resources.
Third, the equipment in the system will be miniaturized, integrated and intelligent, so as to meet the needs of power grid digitization and energy Internet construction; At the same time, environmental protection gas switching equipment and energy-saving transformers are actively applied to promote the green development of power grid.
Fourth, large-scale public DC power distribution still needs some time and will still be dominated by AC power distribution. In some areas where power supply reliability is highly required and renewable energy is concentrated, the ac/DC hybrid power distribution can be used. The user side may form an all-DC power distribution mode.
Fifth, the system will achieve a high degree of physical information fusion. Based on the requirements of system digitalization and intelligent upgrade, the system realizes full coverage of system perception and flexible access to resources on the user side, and improves the observability and controllability of the system through digital twin.
At the level of operation form: first, the system is highly interactive. The safe operation level of the system can be improved through the interaction of multiple subjects of source network load storage. In addition, through the interaction of production links, support system lean operation and maintenance management and user quality service.
The second is the integration of system operation objectives. The operation goal of future power distribution system will not only ensure safe and reliable power supply, but also ensure local consumption of distributed energy, strengthen interaction with the main network, and support the construction of new power system with new energy as the main body.
Third, load management is diversified and flexible. With the precise regulation of demand response load, the construction of spot market and the integrated energy system on the user side, the means of system load management will be diversified and the regulation mode tends to be flexible.
Fourth, the main body of the system operation is diversified. Under the influence of market-oriented policies, the power distribution system will evolve from the original binary relationship between users and power supply companies to the multiple and complex relationship between users, load integrators and power sales companies.
Fifth, maximize the utilization of system resource value. Through the construction of comprehensive energy stations, commercialized sharing of equipment and facilities, and power big data services, the diversified expansion of traditional power supply business models will be promoted to maximize the utilization of power distribution system resources.
Driven by the comprehensive influence of the above morphological changes, the system will be transformed from a passive, unidirectional and monopolistic single power supply system to an active, bi-directional and market-oriented integrated energy service. From the perspective of system functions, power distribution system has increasingly become an ecosystem of multiple service demands and interest demands, endowed with diversified platform roles.
One is the basic guarantee platform of power supply service. Power distribution system is an important part of the power grid, providing safe, reliable and high-quality power supply service for people's good life and economic and social development will be the most basic function of power distribution system.
Second, a friendly platform for the consumption of renewable energy. As a network connecting renewable energy and users, power distribution system needs to make comprehensive use of source network load storage and other technologies to ensure that renewable energy is absorbed nearby and support the realization of new power system and dual carbon goal.
Third, it is an interactive platform for multi-stakeholder participation. With the deepening of power system reform, power distribution system will become a platform for multi-interest subjects to interweave, highly interactive participation, innovative service and value creation.
Fourth, it is an important support platform for the energy Internet. Power distribution system is an important foundation of energy Internet. By supporting the efficient operation of various energy systems, it gradually evolves to an intelligent and diversified energy Internet with electricity as the main and multiple energy interconnection.
From the perspective of system characteristics, the future new power distribution system will be characterized by abundant power supply capacity, reliable and flexible network frame, panoramic system perception, intelligent interaction in operation, cooperative and efficient operation, and resource value reconstruction.
First, the power supply capacity is sufficient. It can fully meet normal user business expansion and policy-based electricity demand, including new infrastructure demand, energy consumption electrification demand and low-carbon transformation demand, etc.
Second, the network frame is reliable and flexible. The grid connection has good compatibility and expansibility, effectively supports flexible access of distributed power supply, large-scale electric vehicles and integrated energy, and improves power supply reliability.
The third is system panorama perception. It has the panoramic data perception function of system status, equipment status, operating environment and operation control, and realizes the online perception of user side data such as electricity consumption information, distributed power supply, energy storage and controllable load.
Fourth, intelligent interaction. Through the interaction of flexible load, distributed power supply and adjustable equipment, reasonable control of power grid components, improve equipment operation efficiency, reduce load peak-valley difference, support optimal power grid operation, support renewable energy consumption.
Fifth, coordinated and efficient operation. Through the coordination of distribution and adjustment business, traditional and emerging business, internal efficient management is realized, and the coordination of power grid and economic and social development is realized. At the same time, we will build a collaborative and efficient service ecosystem with incremental distribution network operators, integrated energy service providers, e-commerce vendors and load integrators.
Sixth, resource value reconstruction. Share infrastructure through multi-station integration, tower commercialization, integrated energy station, etc. Fully excavate the value of power big data, realize the support of power data for credit investigation, urban governance, economic boom research and judgment, energy conservation and emission reduction, and realize the maximum value of system resources.
With the continuous progress of energy technology and the deepening of energy system reform, the power distribution system will continue to present new development needs and trends, and the system will become more and more diversified and integrated. The digitalization and intelligent transformation speed is accelerating, and the system will continue to evolve to a more advanced form.
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
