AddTime：2023-05-27 Author：Xinyuren Hits：592
In the past, for the problem of peak and valley electricity consumption, it was often adopted to restrict industrial enterprises' electricity consumption during peak hours or implement differential electricity prices between peak and valley electricity consumption to guide industrial enterprises to produce staggered electricity consumption. However, practice has proven that the vast majority of industrial enterprises, due to the need for continuous production, have little practical assistance in peak and valley electricity prices for their operations. In addition, the investment in related energy storage facilities is large. In fact, the power restrictions imposed on industrial enterprises not only fail to meet regulatory expectations and effectively solve the electricity peak and valley contradiction, but also increase the burden on enterprises, affecting sustained economic growth, and seriously affecting regional economic development year by year It affects the local business environment and the effective utilization of industrial investment resources. Not only does it not contribute to the improvement of people's livelihoods, but it also causes huge resource waste, which deviates from the goal of efficient resource utilization required by the dual carbon strategy.
3. The most effective way to solve the problem of peak shaving and valley filling is to build urban distributed energy storage power stations.
Urban functional electricity and residential electricity belong to the "six guarantees" category of "ensuring people's livelihoods", and are also the cause of "peak" and "valley" electricity consumption. Therefore, to reduce peak and fill valley, and fully allocate electricity resources, it is necessary to start from the perspective of solving urban functional electricity and residential electricity consumption.
We can compare the entire power grid chain to a "highway system": the power grid side (ultra-high voltage power grid) is the "highway"; The front end is the power generation side (power plant), which is the entrance of the "highway"; The user side (urban functional electricity and residential electricity) is the back end, similar to the exit of a "highway". There is a demand for energy storage on both the power generation side and the power grid side, but the stored energy still needs to be transmitted to users through the high-voltage power grid. The scale of its energy storage application is limited by the traffic capacity of the "highway" and cannot significantly increase supply during peak electricity consumption, thus unable to fundamentally solve the problem of peak shaving and valley filling. On the contrary, as urban functional electricity and residential electricity on the user side, their electricity consumption behavior is the main reason for peak and valley periods. Energy storage during low and peak periods does not need to be transmitted through the high-voltage power grid. Building distributed energy storage stations from the user side is the most direct, effective, and fundamental way to solve the electricity peak and valley problem.
2、 Technical Route and Solution Measures for the Construction of High Security and High Reliability Urban Distributed Energy Storage System
1. High security is the most basic requirement for the construction of urban distributed energy storage power grids
The urban distributed energy storage system refers to an energy storage system that is constructed separately in densely populated areas of high-rise buildings, office areas, medical and health care, cultural and educational areas, CBD functional areas, military and national security areas, and other areas.
These fields not only have huge market space, but also are key to peak and valley regulation of the power grid, and are important areas related to national economy, people's livelihood, and security. Therefore, the construction of energy storage system in the region is of great responsibility, and the safety in this field is more important than Mount Tai, and the safety is overwhelming.
The requirements for energy storage can be divided into three levels: the first level is safety first, and unsafe means nothing; The second level includes indicators directly related to operational economic benefits such as cycle life, cost, energy conversion efficiency, etc; The third level includes indicators that should be improved as much as possible, such as power, environmental friendliness, ease of use, and geographical adaptability. The core of the power station - energy storage batteries - must meet the following requirements: (1) intrinsic safety, even in residential areas without fire safety concerns; (2) The economic benefits of longevity can be calculated; (3) The floor area should be small and there should be a lot of room for venue selection; (4) Normal supply can be guaranteed throughout the year, and regular maintenance and repair are not allowed. Among them, security is a veto.
2. Solution Measures for the Construction of High Security and High Reliability Urban Distributed Power Grid Energy Storage System
(1) At present, the energy storage batteries applicable to the user side are mainly electrochemical energy storage batteries, including lithium iron phosphate battery, liquid flow battery, water NiMH battery, water iron nickel battery, sodium ion battery, and lead acid battery.
At present, lithium iron phosphate is the mainstream technology direction, and developing sodium ion batteries are also highly anticipated.
The characteristics of the organic electrolyte system used in lithium-ion batteries, represented by lithium iron phosphate, determine that the safety issues of lithium-ion batteries cannot be completely solved. During the process of combustion and explosion, lithium batteries are almost impossible to extinguish, and intense toxic smoke and toxic hydrogen fluoride gas may also appear, which can have a fatal impact on personal safety. In addition, lithium-ion batteries not only have the risk of active combustion and explosion, but also passively lose control, causing combustion and explosion. The frequent occurrence of safety accidents in this field at home and abroad has caused high vigilance in relevant industries and society, especially after the Beijing Dahongmen incident, the energy storage construction in this field in China is actually in a semi stagnant state. Internationally, lithium-ion battery electric bicycles have become a "public hazard", and energy storage construction in sensitive areas, office spaces, densely populated areas and other urban functions and population gathering areas is basically a prohibited area for electrochemical energy storage applications. Due to the improvement in cost-effectiveness of lithium-ion batteries, the industry in China has become overly enthusiastic about them in energy storage, while neglecting their safety.
(2) Iron nickel batteries are traditional water-based batteries, with a mixed aqueous solution of sodium hydroxide and potassium hydroxide as the electrolyte. The main and auxiliary materials are inherently safe from fire and explosion, have no worries about toxic gas erosion, and have zero fire costs. Therefore, iron nickel batteries are inherently safe power and energy storage batteries; When charging iron nickel batteries, like lead-acid batteries, some hydrogen and oxygen will be released. Just maintain ventilation to prevent hydrogen accumulation, which can ensure the safety of battery use.
In the 21st century, with the high attention paid by humans to environmental pollution and the sharp increase in demand for power and energy storage battery applications, iron nickel batteries with intrinsic safety, long lifespan, and strong environmental attributes have once again returned to people's view. In China, there have been teams such as Professor Lin Dongfeng from Nankai University, Professor Chen Yungui from Sichuan University, and Professor Tang Yougen from Central South University. In foreign countries, there have been scientists from countries such as the United States, Israel, the Netherlands, the United Kingdom, and Australia, We have conducted phased research on improving iron nickel batteries.
After recognizing the unparalleled safety and environmental benefits of iron nickel batteries compared to other battery systems, Chuangli New Energy took 14 years and invested nearly 100 million yuan. Finally, it achieved a series of major breakthroughs in the negative electrode materials, battery structure, battery technology, and other aspects of iron nickel batteries, creating a new type of iron nickel battery system, retaining the advantages of inherent safety, environmental friendliness, and reliable performance of iron nickel batteries, Solved the core challenges of iron-nickel batteries such as high current rapid charging and discharging, low-temperature passivation, charging efficiency, severe hydrogen evolution, negative electrode material preparation pollution, and high energy consumption, and increased their cycle life from 550 cycles (national standard) to over 15000 cycles (70% DOD), and increased their weight to energy ratio from 18wh/kg to 70wh/kg (about 30% for anti superpolar lead-acid batteries). While significantly improving battery performance, it also improved the overall performance of iron-nickel batteriesRecently, we have once again conquered the energy storage and hydrogen production integrated battery of electrolytic water for hydrogen production, combining energy storage and green hydrogen production from electrolytic water. We have the main technical route and solution that can become the main energy storage scenario, especially for large-scale energy storage such as urban distributed energy storage.
(3) Another choice for energy storage batteries is sodium ion batteries and lead-acid batteries, but there are still some technological routes for sodium ion batteries that need to be mature. The harmful heavy metal pollution and short service life of lead-acid batteries are not suitable for user side energy storage needs.
Chen Jun, Vice President of Nankai University and Academician of the Chinese Academy of Sciences, also believes that water-based iron-nickel batteries are currently the feasible solution to energy storage safety.
3、 The Urgency of Solving Power Peak shaving and Valley Filling
On February 10th, the National Energy Administration held a national renewable energy development and construction situation analysis meeting for February. The meeting pointed out that due to the rapid development of the national economy, the international situation, summer and winter temperatures and other factors, it is foreseeable that there will be a significant increase in electricity demand this year. However, increasing investment in infrastructure will drive the rapid recovery of high capacity industries such as steel and building materials, combined with the base effect of low before 2023 and high after 2023, and the prediction by the national meteorological department that the temperature in most regions of China will be close to normal to high this summer. It is expected that the year-on-year growth of electricity consumption in the whole society this year will be much higher than 7.0% in 2022, and the growth rate will also significantly rebound.
The meeting pointed out that since 2020, due to the impact of three years of domestic and international epidemics, macroeconomic factors, fuel supply, temperature, precipitation, and the continuous large-scale serious losses of coal and power enterprises, there has been a significant gap in power supply and demand. It is expected that the overall supply and demand of electricity in China will be tight during the peak season of summer and winter.
The meeting emphasized that the electricity supply guarantee situation is exceptionally severe this year. On the one hand, improving efficiency, tapping potential, and ensuring reliable power supply, but dealing with peak electricity consumption is generally very tight. The power system continues to strengthen the operation management of in-service units, reduce unplanned shutdowns and obstacles, ensure stable and full capacity of units, and maximize the peak power generation potential of various types of power sources. On the other hand, optimizing the standby power supply, peak shifting support, and surplus and shortage adjustment between cross regional power grids, fully ensuring the balance of power supply and demand during peak periods. At the same time, accelerate the construction progress of key power sources and alleviate the power supply shortage in the load center. Accelerate the optimization of regional grid structures and the construction and transformation of distribution networks, implement the consolidation and improvement project of rural power grids, and enhance the reliability of power supply in the power grid.
In addition, in the context of achieving the "dual carbon goals", the proportion of new energy continues to increase, the uncertainty of safe and stable operation of the power system increases, and the potential risk indicators of large-scale power outages gradually increase. At present, the large-scale development of renewable energy still faces insufficient consumption space in some regions, difficulties in ensuring factors such as land and sea use. Large wind power and photovoltaic bases also face problems such as "power grid projects", "power grid projects", and "power grid planning". Due to the instability and difficulty in consumption of wind and solar power, abandoning wind and solar power has become an unavoidable problem for industry development. It is the primary factor that restricts the safe and widespread application of new energy such as photovoltaic and wind power. Currently, the problem of "peak load demand" cannot be fundamentally solved through the construction of new energy.
The National Development and Reform Commission's Energy Administration's "Development and Reform Energy Regulations  No. 1051 Document" proposes that: "Encourage the exploration of diversified development mode of energy storage in combination with different demands of sources, networks and loads, vigorously promote the construction of energy storage projects at the power supply side, actively promote the rational layout of energy storage at the power grid side, and actively support the diversified development of energy storage at the user side. By 2025, realize the transformation of new energy storage from the initial stage of commercialization to large-scale development. The innovative capacity of new energy storage has been significantly improved, and the level of independent and controllable core technology and equipment has been significantly improved, with the installed capacity reaching 30 Over one million kilowatts. By 2030, achieve comprehensive market-oriented development of new energy storage. New energy storage has become one of the key supports for carbon peaking and carbon neutrality in the energy field. "
In summary, building a highly secure and reliable urban distributed power grid energy storage system on the power consumption side is currently a practical and effective way to solve the problem of "peak shaving and valley filling". At the same time, directly or indirectly, it will not only make immeasurable contributions to energy conservation, emission reduction, and the "dual carbon" goals, but also contribute to the high-quality development of the Chinese economy! Therefore, there is an urgent need for innovative applications of new water based safety iron nickel batteries as energy storage batteries in urban distributed power grid energy storage systems.
4、 It can bring significant economic and social benefits to the country
Given the advantages of "excellent electrical performance applicability, non ignition safety, high investment return economy, and regional flexibility", the new type of iron-nickel battery is expected to surpass lithium batteries and all vanadium flow batteries and become one of the main technical routes and solutions for most energy storage scenarios, especially urban (including industrial parks) distributed energy storage and other large-scale energy storage. The promotion of the use of safe energy storage batteries, represented by the new type of iron nickel batteries, to build urban distributed energy storage will truly solve the problem of peak shaving and valley filling, achieve obvious energy conservation and emission reduction, significantly promote the early realization of carbon neutrality, take into account the economic development in the next 30 years, and realize the double harvest of national, industrial ecology and social capital in terms of economic and social benefits:
(1) Directly reducing fossil fuels by more than 10% and reducing emissions by more than 10% for various types of emissions;
(2) It is of great significance for stabilizing the entire power grid and increasing the redundancy and elasticity of the entire power grid;
(3) More than 10% increase in new energy that can be absorbed on the grid side;
(4) It has freed up a lot of space for economic development in the next 5-10 years;
(5) Indirect reduction of large infrastructure investment in UHV and other power grids can effectively curb unnecessary investment in steel, cement and other high energy consumption, high pollution capacity, indirectly play the role of energy conservation and emission reduction, and help to achieve carbon peak carbon neutrality;
(6) It can effectively improve and leverage the economic and social benefits of existing resource endowments;
(7) Providing a starting point and breakthrough for economic transformation and the transformation of old and new driving forces, new energy, especially the energy storage industry, may become the main force driving high-quality social and economic development;
(8) It may bring about a revolution in electricity use, and provide the world with a carbon neutrality solution for carbon peaking.
Chuangli's new iron nickel water system battery system is a shining pearl in energy storage. It has the advantages of absolute environmental protection, absolute safety, 15000 times of repeated charging and discharging, good temperature performance, long-term storage of large energy capacity, good output continuity, mature technology and international leadership, and low cost in the whole life cycle. Taking this as the core to build urban distributed energy storage will be able to break the development bottleneck of "peak shaving and valley filling", significantly achieve energy conservation and emission reduction, take into account the economic development in the next 30 years, promote the early realization of carbon peak carbon neutrality, and bring significant economic and social benefits to the country.
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