With the intensification of global climate change and the depletion of traditional energy, a new energy revolution has quietly emerged. Improving the level of clean and efficient utilization of fossil energy, gradually replacing fossil energy with renewable energy, achieving a larger share of clean energy such as renewable energy (hydropower, wind power, solar energy, geothermal energy, biomass energy, etc.) and nuclear energy in primary energy production and consumption, and establishing a sustainable energy system are the main goals of the new energy revolution.
The clean utilization of renewable energy, nuclear energy and fossil energy must be achieved by converting them into electrical energy. Under the conditions of the new energy revolution, the importance of the power grid has become increasingly prominent, and the power grid will become an important energy transmission and distribution network for the whole society. Compared with the traditional power grid, the changes in the mission of the future power grid are mainly as follows:
1. Receive large-scale centralized and distributed renewable energy power and become a transmission and distribution network for new energy power;
2. Organically integrate and interact with distributed power sources, energy storage devices, and energy comprehensive and efficient utilization systems to improve terminal energy utilization efficiency and become a flexible and efficient intelligent energy network;
3. With extremely high power supply reliability, it basically eliminates the risk of large-scale power outages and becomes a safe and reliable energy and power supply system;
4. Extensively combine with information and communication systems to become a comprehensive service system integrating energy, power, and information.
At present, my country's energy and power are facing a new stage of development and transformation. From now until 2050, it will be a transition period for my country's power grid to transform from the second generation to the third generation. In line with the transformation of power sources, the development of the power grid will generally be towards a model that combines the national backbone transmission network with local transmission and distribution networks and microgrids. It can not only adapt to the needs of power transmission, optimization and intermittent power compensation of large-scale renewable energy power such as hydropower, wind power, solar power generation, and centralized power generation bases such as clean coal power and nuclear power, but also adapt to the needs of opening up distributed energy power, promoting the development of microgrids, and improving terminal energy utilization efficiency. The five major demand directions for the development of the future power grid are closely related to people's lives.
1. Peak and frequency regulation of the power grid to promote the grid connection and consumption of new energy
The grid brings huge peak and frequency regulation pressure, and the balance regulation of the power system and the safe and stable operation of the power grid face a series of new challenges. If new energy is to develop in an orderly and healthy manner, peak and frequency regulation are what the power grid must do in the future. Through effective operation, it can supplement the energy shortcomings, promote the clean and low-carbonization of energy and the intelligence of high-end equipment, and resolve some contradictions between the effective grid connection and consumption of new energy.
2. Improve power supply reliability and improve power quality
With the rapid economic development and the improvement of residents' living standards, the extensive use of various "high-precision" equipment and the greater emphasis on product quality in the production field have further increased the requirements of power users for power quality. A structural reform on the supply side of power is imperative. The direction and purpose of the future power grid is to improve power supply reliability and improve power quality.
3. Distributed vehicle energy storage charging station
With the decreasing mineral energy and the rising oil costs, fuel vehicles will gradually fade out of the stage of history after 2025, and the replacement will be new energy vehicles. The emergence of a large number of new energy vehicles requires sufficient charging stations to meet the energy supply needs. There is no doubt that distributed vehicle charging stations will be one of the development directions of the power grid in the future.
At present, many domestic companies have begun to layout this field. Yuanyi Energy provides users with a full set of photovoltaic storage and charging solutions, facing large and medium-sized vehicle parking areas, using modular products, providing one-stop overall services, and transforming existing facilities according to specific conditions after field exploration and evaluation, and quickly building photovoltaic-energy storage-charging integrated use scenarios that meet the needs of owners. Owners are free of charge and realize multi-party benefits. Through product services, the energy storage and optimization configuration functions can be fully utilized, and the charging business can share the benefits through the peak-valley price difference, greatly reduce the energy cost, and save a lot of basic capacity fees after capacity expansion.
4. Support the development of distributed energy
Distributed power generation is a system that arranges the power generation system in a small-scale, distributed manner near the user and can independently output electricity, heat or cold energy. It has the advantages of energy saving and emission reduction, low loss, high efficiency, high system reliability, and a variety of energy types. Therefore, it has become one of the directions for the development of the power industry in the 21st century. The development of distributed power sources has formed many branches, such as solar energy, wind energy, hydropower, biomass power generation, etc. Although these distributed energy sources have their own "factions", they have the same goal and ultimately reach a goal of connecting with the power grid. In the face of these distributed energy sources of different "factions", the power grid needs to support their healthy development, so naturally more needs to be done in the future to provide safer, more efficient and low-cost access.
5. Industrial and Commercial/Household Energy Storage
With the advancement of power system reform and the development of energy Internet applications, energy storage, as an important link, is of great significance to my country's energy structure transformation, promoting energy security construction, and achieving energy conservation and emission reduction goals. After three stages of technology research and development, demonstration application and initial commercialization, the next goal will be the application and promotion of large-scale energy storage technology, encouraging power grid companies to invest in energy storage, and encouraging users to invest in and operate energy storage projects.
