New energy storage and pumped storage should be developed simultaneously

Heads of strategy and planning departments of major power enterprises and well-known experts discussed plans and suggestions for the construction of a new electric power system in China at the 9th China Power Planning and Development Forum 2022. New energy high-quality development, pumped energy storage and new storage, digital transformation and other fields will become a hot industry of electric power system, and also a new direction of electric power transformation development in the future.

We will increase the consumption of new energy

New energy is playing an increasingly important role in the construction of new power system. Ma Jun, director of the Comprehensive Division of the Power Department of the National Energy Administration, said that during the "14th Five-Year Plan" period, China will adhere to the moderate advance of power development, ensure the supply of surplus, transformation and upgrading to the first, based on the basic national conditions of coal, power security and transformation and upgrading. The gradual withdrawal of traditional energy sources should be based on the safe and reliable replacement of new energy sources. We should promote the distribution of power supply sources based on demand and large-scale development and consumption of new energy sources. We should strengthen the optimization of large power grids and the construction of active and strong local power grids.

You Min, Executive Vice President and Secretary general of China Electric Power Development Promotion Council, believes that the construction of smart energy system needs to face high randomness, multi-scale, multi-source, high noise and other problems. Therefore, accurate forecasts of supply (e.g., PV, wind) and demand (e.g., electricity load) are important. Wisdom energy system can optimize scheduling, stochastic modeling, comprehensive utilization of space and time sequence forecast, multi-scale analysis and machine learning techniques, such as science, automatic closed-loop optimization, balance of power supply and demand, thus promote the grid from Dutch with "source" to "source load interaction", from "redundancy insurance security" to "promote safety redundancy reduction", To improve the stability of the power system. By integrating complex knowledge of various fields (such as qualitative expert experience and quantitative governing equations, etc.) and data from various sources, a dual-driven model of knowledge and data can be built to reduce data requirements and improve reliability and accuracy.

Zhang Dongxiao, academic vice president of the Southern University of Science and Technology, suggested that efforts should be made to promote the construction of trans-provincial and trans-regional power transmission channels, and that coal support bases should be established in the receiving areas to reverse the active shortage of coal power construction as soon as possible. On the premise of ensuring safety, we will speed up the construction of nuclear power distribution, improve the reliable alternative capacity of new energy, accelerate the construction of long-term energy storage distribution, greatly improve the capacity of demand-side management, and actively carry out the coupling development of energy utilization among industries.

Xie Hongwen, deputy chief engineer of the General Institute of Hydropower Planning and Design, said that the continuous promotion of cost reduction and efficiency is the core driving force to ensure the healthy and sustainable development of new energy power generation. The development of large-scale new energy bases in deserts, Gobi and deserts should be promoted according to the overall planning idea of "trinity", which is based on large-scale wind power bases, supported by clean, efficient and advanced energy saving coal power around them, and supported by stable, safe and reliable UHV transmission and transformation lines. Adhere to the western and eastern development, centralized and decentralized development.

Xie Hongwen suggested that the coordinated development of power grids at all levels should be promoted based on the needs of China's energy endowment and high-quality power development, and the digitalization level should be upgraded to the energy Internet. Centering on the large-scale development and utilization of new energy, China will continue to do a good job in connecting power sources to the network, build a new power system dispatching system, optimize the trading and consumption mode of new energy, strengthen top-level design and unified planning, and optimize the power market system.

New energy storage and pumped storage should be developed simultaneously

More attention has been paid to the field of power system energy storage. It is understood that at present, energy storage technology routes are mainly divided into physical energy storage and chemical energy storage. The former is represented by pumped storage, compressed air energy storage and flywheel energy storage. The latter is represented by lithium ion battery, sodium ion battery, lead-acid battery and liquid flow battery.

According to the Blue Book on the Development of the Global Clean Energy Equipment Industry (2021), from 2010 to 2021, the installed power of the global energy storage system increased by 41.08% to 191.28GW, and the global energy storage capacity increased by 47.59% to 672.2GWh. At present, pumped storage is the most mature, optimal economy, the most large-scale development conditions of energy storage. However, compared to the more traditional methods of storage such as pumped storage, the market is focused on new energy storage.

The experts at the meeting made suggestions on two energy storage modes.

Zhang Nianmu, director of the Strategic development Department (policy research office) of China Power Construction Corporation, believes that pumped storage is a key support for realizing the goal of "dual carbon" and building a new power system with new energy as the main body. At present, we should pay more attention to the industrial chain coordination, distribution rationality, price mechanism implementation refinement, and the quality of the early work.

Pei Aiguo, general manager of the Science and Technology Information Equipment Division of China Energy Construction Corp, said large-scale energy storage applications will become an important symbol of the new power system, and the new energy storage and pumped storage will play a complementary role. New energy storage has a wide range of application scenarios in terms of supporting large-scale delivery of new energy bases, improving local consumption capacity of new energy, and supporting user side flexible and low-carbon energy demand.

Lu Chenguang, deputy director of Datang Group Science and Technology Research Institute, suggested that local energy storage policies have a direct impact on the implementation of energy storage projects, but the timeliness is short, and a long-term mechanism for new energy storage needs to be introduced. It is necessary to actively promote the electricity market reform and promote the full participation of various energy storage systems in the diversified electricity market, such as supporting the participation of user-side energy storage in the auxiliary service market and opening up more inter-provincial auxiliary service markets as soon as possible.

New transformation strategy of leading power transmission and transformation company

State Grid and Huaneng Group and other large leading power generation enterprises have taken the lead in the construction of a new type of power system transformation in advance of the comprehensive promotion, but also put forward the current challenges.

Zhao Honglei, deputy director of the development and planning department of the State Grid Corporation, said that the company will follow the objective laws of the power system, firmly establish the concept of system, play the role of the core hub of the power grid, and cooperate with the whole industrial chain and supply chain enterprises. By accelerating the development of new energy, improving the capacity of system regulation, accelerating the construction of digital power grid, accelerating the intelligent control of electricity demand, accelerating the research on core technologies, accelerating the construction of market system, and accelerating the formation of demonstration results, we will comprehensively promote the construction of a new electric power system.

Li Jianping, deputy director of the planning and development department of Huaneng Group, said that by 2025, Huaneng Group's controllable power generation capacity will reach about 300 million kilowatts, the installed capacity of low-carbon and clean energy will account for more than 50 percent, and carbon emissions will peak during the 15th Five-Year Plan period. During the period of "difference", huaneng group will carry out scientific and technological innovation to support high quality development, vigorously develop new energy resources, vigorously develop hydropower, safe and efficient development of nuclear power, coal and electricity transformation development, gas preferred development of electricity and other clean energy generation, integrated energy services and stronger do optimal, the optimization for the coal industry development, accelerate the development of foreign industry in the global market layout.

, says huaneng group Li Jianping, assistant director of the planning and development of new energy development and energy insurance for the face of difficulties and challenges: one is the new energy project development cost is high, the second is need electricity pricing mechanism and persuation mechanism reform, three is electric power system, it is necessary to strengthen the technological progress and innovation of the four is the basis of the traditional energy status needs attention.

Zhao Xinyi, deputy director of the strategic planning Department of the National Energy Group, said that the long-distance power grid transmission cannot meet the needs of decarbonization of cities, cities show new load characteristics, reducing urban carbon emissions must be based on the city itself, to fully tap the potential of user-side flexibility, digital technology will enable smart energy cities. The digital application promotes the synergy of multiple energy sources, centralized and distributed, realizes the optimal allocation of energy flow, information flow and value flow, better connects power sources and users, and promotes the higher quality, more efficient and more sustainable development of energy systems. Virtual power plant is the core of energy service-enabled smart city. He suggested that multiple energy sources should complement each other to match supply and demand. Push power data to grid data as the core, opening up and sharing, will be conducive to break between departments, between enterprise, industry barriers, creating energy centered new industry, new forms and new model of digital economy, build new scene of efficient utilization of clean energy, to the nearest, promote the economic development of our country change quality, change efficiency, dynamic change.