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| Top 10 application scenarios and case analysis of energy storage |
| Release time:2022-12-12 15:32:37| Viewed： |
Top 10 application scenarios and case analysis of energy storage
In recent years, with the rapid development of the energy storage market, the number of application scenarios has also increased. The super large "power bank" has become the source of energy for all walks of life. The specific application scenarios and case studies of energy storage projects are presented below.
1.5G base station+energy storage Under the background of actively adapting to the new business requirements of 5G network and helping the transformation of energy structure, "lithium battery for communication energy storage and lithium battery intelligence" has become the trend of the times. What should we do if 5G and other new infrastructure are also short of power?
In terms of energy consumption, the peak power of a 5G base station is 3-4 times that of a 4G base station, and the demand for power has increased significantly. On the other hand, in the 2G, 3G and 4G era, the site power supply is mainly passive response, lacking active planning, which is easy to lead to resource waste.
Under the higher power demand, how to improve the system operation efficiency of 5G base station and reduce resource waste has become the focus of 5G construction. Therefore, the flexible, intelligent and efficient technical characteristics of the electrochemical energy storage system make it a suitable choice for the backup power supply of 5G base station.
Case:
Jiashan County Energy Storage Polymerization Platform
174 Unicom base stations+energy storage user side, according to the power needs of each region, are uniformly deployed to achieve accurate scheduling and orderly power use, and ensure the safe and stable power supply of the county.
It is understood that in order to speed up the construction of a modern integrated smart energy system, the State Grid Jiashan County Power Supply Company has started the exploration of the "5G base station+energy storage" project since 2020, and has cooperated with Jiashan Unicom and other enterprises to transform the 5G base station energy storage equipment by replacing lithium iron phosphate batteries, building energy storage equipment monitoring platforms and other forms, so as to further improve the level of battery charging and discharging, and enable it to provide peak shaving, valley filling, load response and other services.
2. Data center+energy storage project
Century Internet energy storage data center project
The energy storage system is connected to the data center, which can enhance the power supply reliability of the data center and prevent data loss caused by accidental power failure. The energy storage system improves the economy of power operation in the data center, low carbon and energy conservation through peak shaving and valley filling, capacity allocation and other mechanisms.
1. Data center background power supply
Traditional data centers need to use a large number of lead acid batteries as backup power, but the battery status is unknown. In the energy storage data center, the battery will discharge every day, and the voltage after discharge is clear, which makes it easy to judge whether the battery is good or bad, helps to eliminate bad batteries in time, and saves the cost of annual fake load test.
2. Data center access to energy storage, energy conservation and income generation
Access to the energy storage system and arbitrage through the peak valley price difference of electricity charges. The data center is no longer a simple power load, but has callable and adjustable power nodes, and even participates in grid frequency modulation. Flexible switching is conducive to the optimal mode of grid, data center, and new energy power generation to achieve energy conservation and emission reduction. ?Case:
On January 28, 2021, the first "12 stations in one" comprehensive energy station in the Yangtze River Delta will be put into operation in Wuxi. The whole station integrates 12 urban public facilities, including substation, energy storage station, distributed photovoltaic station, pre installed cold and hot supply station, smart street lamp, intelligent linkage unmanned patrol, data center machine room, 5G micro station, electric vehicle charging station, electric vehicle power exchange station, power exchange e station and self-service washing station.
The first multifunctional comprehensive energy service station in the Yangtze River Delta
3. Intercity rail transit+flywheel energy storage The train can store electric energy through energy storage technology, and release electric energy in case of no catenary or emergency to ensure normal operation.
Metro+flywheel energy storage
The distance between urban rail transit stations is short, and trains are frequently started and braked, which can be said to be a "big power consumer" in the operation process. The train will generate a considerable amount of energy during braking (that is, "braking"), which is of recycling value.
According to statistics, the energy generated by rail transit train braking can reach about 20% - 40% of the energy consumption of traction system. If fully utilized, it will significantly reduce the energy consumption of rail transit operation.
Flywheel energy storage belongs to physical energy storage. The magnetic suspension technology is adopted, and the flywheel rotor operates in a vacuum chamber without wind resistance.
The flywheel energy storage device is installed in the rail transit traction substation. When the train enters the station for braking, the flywheel absorbs energy and converts electric energy into kinetic energy, with the speed up to 20000 revolutions per minute; When the train accelerates out of the station, the flywheel releases energy, which converts kinetic energy into electric energy and releases energy for use by the train. It has excellent energy-saving and voltage stabilizing effects. Case:
Qingdao Metro+flywheel energy storage
The flywheel energy storage device of Qingdao Metro can save 15% of the traction energy consumption. After the two flywheel energy storage devices are put into use, it is estimated that the annual power savings will be about 500000 kilowatt hours, the 30-year life cycle will save 15 million kilowatt hours, and the electricity cost will be about 10.65 million yuan.
At the same time, its network voltage fluctuation suppression function can significantly improve the stability of rail transit traction power supply system and improve the power quality of power supply system.
4. Optical storage charging station In the era of high oil prices and rising oil prices, new energy vehicles have become the choice of many car owners. Today, with the vigorous development of new energy vehicles, the construction of charging infrastructure is also gradually accelerating. As the energy supply facility to maintain the operation of new energy vehicles, the charging station of new energy vehicles can be called a proper outlet.
Under the background of carbon neutralization, the super charging stations covering "photovoltaic+energy storage+charging" are favored by local governments. On the one hand, the addition of energy storage can help solve some power generation redundancy and grid connection problems in the application process of photovoltaic, on the other hand, it can play a combined advantage to drive the multi-directional development of photovoltaic, energy storage and charging piles. Case:
Fujian Optical Storage Charging and Inspection Intelligent Overcharging Station The charging station covers an area of 2100 square meters, which can meet the requirements of megawatt energy storage system and 1000V charging voltage platform. This overcharge station is mainly composed of photovoltaic system, energy storage battery system, new energy vehicle charging station, battery online detection system, intelligent energy management cloud platform, etc.
5. Zero carbon smart park+energy storage The factory park has a large area, and there are many equipment such as cabinets and machine rooms. Therefore, the electrical appliances are characterized by large useful power, high load for a long time, and large energy consumption of equipment. In addition, China's industrial parks have a high price difference, which is suitable for peak valley arbitrage of energy storage projects. Case:
Wuxi Xingzhou Industrial Park
This is a large energy storage power station with a power of 20 MW and a capacity of 160 MWh, ranking first among domestic commercial energy storage power stations. In August, during the high temperature period, there will be a "discharge" once or twice a day. The demand response lasts for more than 10 days, and about 600000 kilowatt hours of electricity has been released in August.
Guangdong Dongguan Xinyi Glass Industrial Park Energy Storage Project
Jinhu Industrial Park, Huai'an City, Jiangsu Province
6. Hospital+energy storage standby power supply The hospital is a key unit of energy consumption, and the power consumption of one day under extreme high temperature in summer is equivalent to the total power consumption of 3000 normal families of four in one day.
However, due to the particularity of the hospital's service for life, every corner of the hospital is a channel for life in the operating room, ward, rescue room, etc., and there must be no operational problems. According to the visit, Wuhan Huoshen Mountain Hospital can consume up to 350000 kilowatt hours of electricity in one day.
The energy storage project can serve as a UPS (uninterruptible power supply) function to ensure that important loads of the hospital are not powered off, and provide a solid power guarantee for the smooth operation of the hospital. Case:
Fujian Magao Ai Memorial Hospital 0.75MW/1.8MWh Energy Storage Project
On December 31, 2018, the first phase of the 0.75MW/1.8MWh energy storage project of Fujian Magao Ai Memorial Hospital was successfully put into operation.
This project is the first hospital system energy storage project in Fujian Province. It can cut the peak and fill the valley of the power grid when the power grid is normal. It can quickly disconnect the power grid when the power grid is off, so as to ensure the power supply of important loads in the hospital.
Energy storage power station of Peking University International Hospital
In order to improve the safety of electricity use, improve the utilization efficiency of electric energy and deal with the problem of power shortage in peak periods, Peking University International Hospital actively responded to the national policy of energy conservation and emission reduction, and bravely tried to apply new technologies.
The project of about 2.7MW energy storage power station was finally signed in the form of energy management contract by using social capital. The energy storage power station is connected to the low voltage side of the transformer. When the energy storage system discharges to the 400V bus, it is strictly prohibited to back transmit power to the high voltage side to ensure the reliability of power consumption.
In terms of economy, the energy storage power station adopts the form of energy management contract, and the construction of idle space does not require hospital investment. The energy storage power station is installed to store electric energy in the valley time (battery), supply power to power load in the peak time, and reduce the electricity charges of power users by using the "peak valley price difference". The energy storage power station is expected to save electricity charges of 160000 yuan every year.
7. Oil+energy storage All major oil companies have deployed energy storage to help the country achieve the "dual carbon" goal while accelerating the energy transformation.
"For the upstream field of oil and gas enterprises, the construction of 'new energy power generation+distribution and storage' is an inevitable path. The downstream field of 'refining enterprises+distribution and storage' also has a promising application prospect.
”It is understood that enterprises have to face the biggest challenges brought by renewable energy power generation - volatility and intermittency, whether they are building wind power or photovoltaic power generation. How to obtain a continuous and stable clean power supply and ensure the normal production and life of the oil region 24 hours a day, "distribution and storage" is the key.
Due to the field operation of the oil and gas testing team, the power is mainly supplied by the diesel generator, and there is no reliable fixed and continuous economic power supply. This plan uses cost-effective lithium battery energy storage system to solve problems such as discontinuous power supply and battery neck.
Case:
The first "photovoltaic+energy storage" test project of PetroChina Huabei Oilfield
The "PV+energy storage" test project of Well Pad 31-18 of No. 1 Oil Production Plant consists of 10.9 kilowatt photovoltaic panels, a lithium iron phosphate battery with a maximum starting power of 30 kilowatts and a power storage capacity of 56 degrees, and an intelligent electronic control management device. A new energy management system from power storage, power supply to power consumption has been initially established.
The purpose of the test is mainly to verify the capacity and power, charging and discharging performance, safety and stability of lithium iron phosphate battery, as well as the application effect in the power supply process of single oil well, and finally calculate the economic benefits of electricity saving.
8. Energy storage+micro grid Microgrid, also known as distributed energy island system, systematically combines generators, loads, energy storage devices and control devices to form a single controllable unit, which simultaneously supplies power and heat to users.
Micro grid+energy storage is applicable to power consumption in remote areas, and some places that cannot be covered by large power grids, such as islands, remote mountain areas, etc.
Island microgrid Case:
Seawater desalination equipment with micro grid complementary scenery of an island reef in Sansha, South China Sea
Sansha is far from Hainan Island, so it is unrealistic to transmit electric energy to the islands and reefs through submarine cables. By establishing smart micro grid on the island and making full use of photovoltaic, wind energy, wave energy and other energies, the consumption of traditional diesel can be minimized, which is in line with the development concept of "three sands".
Sansha smart micro grid energy management system is an application demonstration project in China's national power technology field, which has undergone three years of research and practice. The main station of the system is set up in Yongxing Island, which can realize the collection and monitoring of various load data such as diesel generator, photovoltaic system, energy storage system, main sub microgrid, seawater desalination, charging pile, etc.
Since the trial operation of the system in 2017, the power supply reliability rate has been 100%, the voltage qualification rate has been 100%, and the clean energy consumption rate has been 100%. Hundreds of tons of diesel have been saved by using clean energy such as photovoltaic for more than a year.
Ningde's first island photovoltaic energy storage microgrid
Bei'e Island is located in the southeast of Xiapu County, surrounded by the sea on all sides, and is about 19 kilometers from the nearest point of the mainland. In order to make the production and living electricity of Bei'e Island more reliable, Ningde Power Supply Company of the State Grid will invest 5.06 million yuan in 2020 to build a photovoltaic energy storage micro grid in Bei'e Island.
The microgrid is composed of two 10kV secondary power supply projects. After being put into operation, the daily power generation is expected to be 224.24 kWh. The photovoltaic energy storage microgrid, as the island's backup power supply, is connected in parallel with the land main grid to provide emergency power for the island troops and hospitals, as well as the production and living of villagers. With the official operation of the micro grid, the power supply capacity of Beigu Island will be greatly improved.
9. Scenery+energy storage The foregoing is all about energy storage on the power consumption side, while on the power generation side, the proportion of new energy power generation, distribution and storage has gradually increased. In some regions, mandatory energy distribution and storage have also opened up a development path for shared energy storage and other models.
Since 2021, a total of 24 provinces and autonomous regions in China have issued new energy allocation and storage policies, among which many places have put forward clear requirements for energy storage of distributed photovoltaic supporting construction. Among these documents, Zaozhuang, Shandong, has the highest requirement for the storage capacity, which is to build energy storage for 15%~30% of the installed capacity and lasts for 2~4 hours.
Case:
50 MW "PV+Energy Storage" Comprehensive Energy Demonstration Project in Xigaze, Tibet
The 50 MW "photovoltaic+energy storage" integrated energy demonstration project in Xigaze City, Tibet is connected to the grid for power generation. The project covers an area of about 1600 mu, with a total investment of about 450 million yuan. It is estimated that the annual power generation can reach 100 million kilowatt hours.
10. Shared energy storage+power grid In the traditional power system, the power output curve is relatively stable, but the power consumption curve (demand curve) fluctuates many times in a day, making it difficult to match the supply and demand curve of the power system.
The energy storage at the grid side is connected to the transmission network or distribution network, which is uniformly dispatched by the grid company, and can independently participate in the regulation of the grid. The grid peak shaving and energy storage system realizes peak shaving and frequency modulation through high storage and low discharge to ensure the stability of the grid. At the same time, it can also improve the transmission capacity of the power grid, alleviate congestion, and serve as emergency backup power supply for faults. Case:
Nanjing: Jiangbei Energy Storage Power Station
On March 1, 2022, Jiangbei Energy Storage Power Station, the largest "charging treasure" in Nanjing, will enter the equipment acceptance stage of a new power system focusing on the development of clean energy, and is expected to be officially put into operation in May.
Jiangbei Energy Storage Power Station, located in Xinke 12th Road, Jiangbei New District, Nanjing, covers an area of 51.26 mu, with a maximum charge discharge power of 110.88 MW, a storage capacity of 193.6 MW hours and a storage capacity of about 190000 kWh. The energy storage power station "plugs into" the power grid for charging when the power consumption is low, and releases power during peak power consumption, effectively filling the power gap. |
