Sectoral dynamics
Top Ten Application Scenarios for Energy Storage Projects!
In 2022, energy storage has ushered in an industry trend. Today, we will organize the top ten application scenarios for energy storage projects for your reference!
one
5G base station+energy storage
In the context of adapting to the new business requirements of 5G networks and assisting in the transformation of energy structure, the trend of "lithium-ion communication energy storage and lithium-ion intelligence" has become the trend. What if new infrastructure such as 5G also lacks power?
In terms of energy consumption, the peak power of 5G base stations is between 3-4 times that of 4G base stations, which significantly increases the demand for electricity. On the other hand, in the era of 2G, 3G, and 4G, site power is mainly passive response, lacking active planning, which can easily lead to resource waste.
Under higher electricity demand, how to improve the system operation efficiency of 5G base stations and reduce resource waste has become the focus of 5G construction. Therefore, the flexible, intelligent, and * * technical characteristics of electrochemical energy storage systems make them a suitable choice for backup power supply of 5G base stations.
174 China Unicom base stations and energy storage user sides are uniformly allocated according to the electricity needs of each area, achieving precise and orderly scheduling of electricity consumption, and ensuring safe and stable electricity supply throughout the county.
It is understood that in order to accelerate the construction of a modern comprehensive smart energy system, State Grid Jiashan County Power Supply Company has started exploring the "5G base station+energy storage" project since 2020. It has cooperated with enterprises such as Jiashan Unicom to transform the 5G base station energy storage equipment by replacing lithium iron phosphate batteries and building a monitoring platform for energy storage equipment, further improving the battery charging and discharging level, and providing services such as peak shaving and valley filling, and load response.
two
Data center+energy storage project
The energy storage system connected to the data center can enhance the power supply stability of the data center and prevent data loss caused by accidental power outages. The energy storage system improves the economy of data center power operation and low-carbon energy conservation through mechanisms such as peak shaving and valley filling, capacity allocation, etc.
1. Data center backend power supply
Traditional data centers require a large number of lead-acid batteries as backup power sources, but the battery status is unknown. In energy storage data centers, batteries are discharged every day, and the voltage after discharge is clear at a glance. It is easy to determine the quality of the batteries, which helps to eliminate defective batteries in a timely manner and saves the cost of conducting fake load tests every year.
2. Data center access for energy storage, energy conservation, and income generation
Connect to the energy storage system and arbitrage through the peak valley price difference of electricity bills. Making the data center no longer a simple power load, but with callable and adjustable power nodes, and even participating in grid frequency regulation, flexibly switching optimal modes that are conducive to grid, data center, and new energy generation, achieving energy conservation and emission reduction.
On January 28, 2021, the "Twelve Stations in One" comprehensive energy station in the Yangtze River Delta was put into operation in Wuxi. The entire station integrates 12 urban public facilities, including substations, energy storage stations, distributed photovoltaic stations, pre installed cold and hot supply stations, smart street lights, intelligent linkage unmanned inspection, data center computer rooms, 5G microstates, electric vehicle charging stations, electric vehicle exchange stations, exchange stations, and self-service washing stations.
three
Intercity rail transit+flywheel energy storage
Trains can store electrical energy through energy storage technology and release it in case of no contact network or emergency situations to ensure normal operation.
Subway+flywheel energy storage
The distance between urban rail transit stations is short, and trains frequently start and brake, making them a "major consumer of electricity" during operation. During the braking process (commonly known as "braking") of a train, a considerable amount of energy is generated, which has recycling value.
According to statistics, the energy generated by the braking of rail transit trains can reach about 20% -40% of the energy consumption of the traction system. If fully utilized, it will significantly reduce the energy consumption of rail transit operations.
Flywheel energy storage belongs to physical energy storage and adopts magnetic levitation technology. The flywheel rotor operates in a vacuum chamber without wind resistance. The flywheel energy storage device is installed in the traction substation of rail transit. When the train enters the station for braking, the flywheel absorbs energy and converts it into kinetic energy, with a speed of up to 20000 revolutions per minute; When the train accelerates out of the station, the flywheel releases energy, converting kinetic energy into electrical energy, which is released for use by the train and has excellent energy-saving and voltage stabilizing effects.
The flywheel energy storage device of Qingdao Metro can achieve a 15% reduction in traction energy consumption. After the two flywheel energy storage devices are put into use, it is expected to save about 500000 kilowatt hours of electricity annually, with a 30 year lifespan of 15 million kilowatt hours, and save about 10.65 million yuan in electricity bills. 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 the power supply system.
four
Optical storage charging station
In the era of high fuel costs and rising oil prices, new energy vehicles have become the choice of many car owners. Today, with the booming development of new energy vehicles, the construction of charging infrastructure is also gradually accelerating. As an energy supply facility to maintain the operation of new energy vehicles, new energy vehicle charging stations can be considered a legitimate trend. In the context of carbon neutrality, super charging stations covering "photovoltaic+energy storage+charging" are highly favored by local governments. The addition of energy storage can help solve some of the power generation redundancy and grid connection problems in the application process of photovoltaics, and on the other hand, it can leverage its combination advantages to drive the multi-directional development of photovoltaics, energy storage, and charging piles.
The charging station covers an area of 2100 square meters and can meet the needs of megawatt level energy storage systems and 1000V charging voltage platforms. This overcharging station mainly consists of photovoltaic systems, energy storage battery systems, new energy vehicle charging stations, online battery testing systems, and smart energy management cloud platforms.
five
Zero carbon smart park+energy storage
The factory park has a large area, with a large number of equipment such as cabinets and computer rooms. Therefore, electrical appliances have the characteristics of high useful power, long-term high load, and high equipment energy consumption. Moreover, industrial parks in China have a high electricity price difference, which is suitable for peak valley arbitrage of energy storage projects.
This is a large energy storage power plant with a power of 20 megawatts and a capacity of 160 megawatt hours, ranking first among commercial energy storage power plants in China. During the high temperature period in August, there is basically one or two days of 'discharge', and the demand response can last for over 10 days. Approximately 600000 kWh of electricity was released throughout August.
six
Hospital+energy storage backup power supply
Hospitals are key energy consuming units, and the daily electricity consumption under high temperatures in summer is equivalent to the total electricity consumption of 3000 normal families of four in a day. However, due to the special nature of hospitals serving life, every corner of the hospital, such as operating rooms, wards, emergency rooms, etc., is a channel for life, and there must be no operational problems. According to the survey, Wuhan Huoshen Mountain Hospital consumes up to 350000 kWh of electricity per day.
The energy storage project can serve as a UPS (uninterruptible power supply) function, ensuring that important loads in the hospital are not powered off, providing a solid power guarantee for the smooth operation of the hospital.
On December 31, 2018, the first phase of the 0.75MW/1.8MWh energy storage project at Fujian Magao Ai Memorial Hospital was successfully put into operation.
This project is an energy storage project for the hospital system in Fujian Province. It can achieve peak shaving and valley filling of the power grid during normal power supply, and can quickly disconnect the power grid in the event of a power outage. It also provides power for important loads of the hospital.
In order to improve electricity safety, improve energy utilization efficiency, and cope with power shortages during peak periods, Peking University International Hospital actively responds to national policies on energy conservation and emission reduction, and dares to try the application of new technologies. We signed an approximately 2.7MW energy storage power station project in the form of an energy management contract 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 reverse power supply to the high-voltage side to ensure the stability of electricity consumption.
In terms of economy, energy storage power stations adopt the form of energy management contracts, and the construction of idle space does not require hospital investment. Install energy storage power stations to store electricity during peak hours (batteries) and supply power to electricity loads during peak hours. Utilize the "peak valley electricity price difference" to reduce electricity bills for power users. The energy storage power station is expected to save electricity bills of 160000 yuan per year.
seven
Oil+Energy Storage
Major oil companies are deploying energy storage to accelerate energy transformation while helping the country achieve the "dual carbon" goal.
For the upstream field of oil and gas enterprises, building 'new energy power generation+distribution and storage' is a necessary path. The downstream field of 'refining enterprises+distribution and storage' also has many application prospects. It is understood that whether building wind power or photovoltaic power generation, enterprises must face the major challenges brought by renewable energy power generation - volatility and intermittency. How to obtain a continuous and stable clean power supply and ensure 24-hour normal production and living in oil areas, "distribution and storage" is the key.
Due to the field operation of the oil and gas testing team, they mainly rely on diesel generators for power supply, and there is no stable, fixed, and continuous economic power supply. This plan adopts a cost-effective lithium battery energy storage system to solve problems such as power supply discontinuity and battery neck usage.
The "Photovoltaic+Energy Storage" test project for the 31-18 well pad of Oil Production Plant 1 consists of 10.9 kilowatt photovoltaic panels, a lithium iron phosphate battery with a high starting power of 30 kilowatts and a 56 degree storage capacity, and an intelligent electronic control management device. A new energy management system from energy storage, power supply to electricity consumption has been preliminarily established. The main purpose of the experiment is to verify the capacity and power, charging and discharging performance, safety and stability of lithium iron phosphate batteries, as well as their application effect in the power supply process of single well oil production, and ultimately calculate the economic benefits of saving electricity bills.
eight
Energy storage+microgrid
Microgrids, also known as distributed energy island systems, systematically combine generators, loads, energy storage devices, and control devices to form a single controllable unit that simultaneously supplies electricity and heat to users.
Island microgrid
Micro grid+energy storage is suitable for remote areas where electricity is used, and some areas that cannot be covered by large grids, such as islands, remote mountainous areas, etc.
Sansha is far from Hainan Island, and it is not practical to transmit electricity to the islands and reefs through submarine cables. By establishing an intelligent microgrid on the island and fully utilizing energy sources such as photovoltaic, wind, and wave energy, traditional diesel consumption can be greatly reduced, which is in line with the development concept of the Three Sands.
The Sansha Intelligent Microgrid Energy Management System is an application demonstration project in the field of power technology in China, which has undergone three years of research and practice. The main station of this system is located on Yongxing Island, which can collect and monitor various load data such as diesel generators, photovoltaic systems, energy storage systems, main sub microgrids, seawater desalination, charging stations, etc. Since its trial operation in 2017, the system has achieved power supply stability rate *, voltage qualification rate *, clean energy consumption rate *, and saved hundreds of tons of diesel through the use of clean energy such as photovoltaic for over a year.
Beibu Island is located in the southeast of Xiapu County, surrounded by the sea on all sides, about 19 kilometers from the mainland. In order to make the production and living electricity consumption of Beibu Island more stable, State Grid Ningde Power Supply Company invested 5.06 million yuan in 2020 to build a photovoltaic energy storage microgrid on Beibu Island. The microgrid consists of two 10kV secondary power supply projects, with an estimated daily power generation of 224.24 kilowatt hours after production. The photovoltaic energy storage microgrid serves as a backup power source on the island, connected in parallel with the main land grid, providing emergency power for the stationed troops and hospitals, as well as providing production and living for villagers. With the official operation of the microgrid, the power supply capacity of Beibu Island will be greatly improved.
nine
Wind and solar energy+energy storage
The previous discussions were all about energy storage on the electricity consumption side, while on the power generation side, the proportion of new energy generation and storage is gradually increasing. In some regions, mandatory energy distribution and storage have also opened up a development path for models such as shared energy storage.
Since 2021, a total of 24 provinces and regions in China have issued new energy distribution and storage policies, among which many places have put forward clear requirements for the construction of distributed photovoltaic supporting energy storage. Among these numerous documents, Shandong Zaozhuang has a high requirement for energy storage capacity, which is 15% to 30% of the installed capacity, with a duration of 2-4 hours.
The 50 MW "Photovoltaic+Energy Storage" Comprehensive Energy Demonstration Project in Shigatse City, Tibet is connected to the grid for power generation. The project covers an area of approximately 1600 acres, with a total investment of approximately 450 million RMB, and is expected to generate up to 100 million kilowatt hours of electricity annually.
ten
Shared energy storage+power grid
Shared energy storage refers to the literal meaning, similar to shared bicycles and shared power banks, where capital independent of the operator is responsible for building new energy storage power stations and renting them out to the power station operator.
Whether it's photovoltaic or wind power, due to objective factors, power generation fluctuates greatly and is prone to impact the power grid. Therefore, energy storage is needed for allocation. Currently, thermal power generation is still the main method in China, and new energy generation accounts for a relatively small proportion, so it can still cope with it. However, with the increasing proportion of new energy generation in the future, large-scale configuration of energy storage is also imperative.
So, some regions have mandatory requirements that energy storage must be configured for building new energy power stations! Against the backdrop of high energy storage materials represented by lithium, forced energy storage will further compress the profits of investors and operators of new energy power plants.
In order to solve this problem, "shared energy storage" has emerged. Energy storage power stations can both rent out capacity and participate in spot electricity trading to arbitrage, effectively solving cost problems and promoting the further popularization of energy storage systems. After all, energy storage and photovoltaic wind power are complementary, and without large-scale supporting energy storage, it is impossible to fully apply new energy for power generation.
In traditional power systems, the electricity output curve is relatively stable, but the electricity consumption curve (demand curve) experiences multiple peaks and valleys within a day, making it difficult to match the supply and demand curve of the power system.
The energy storage on the power grid side is connected to the transmission or distribution network, and is uniformly dispatched by the power grid company. It can independently participate in the regulation of the power grid. The peak shaving and energy storage system of the power grid achieves peak shaving and frequency regulation through high storage and low discharge, ensuring the stability of the power grid. At the same time, it can also improve the transmission capacity of the power grid, alleviate congestion, and serve as an emergency backup power source in case of a malfunction.
On March 1, 2022, a new type of power system with the development of clean energy as the main focus, the Jiangbei Energy Storage Power Station, a "power bank" of Nanjing * University, entered the equipment acceptance stage and is expected to be officially put into operation in May.
The Jiangbei Energy Storage Power Station, located on Xinke 12th Road in Jiangbei New District, Nanjing, covers an area of 51.26 acres, with a large charging and discharging power of 110.88 megawatts and a storage capacity of 193.6 megawatt hours, which can store approximately 190000 kilowatt hours of electricity. Energy storage stations "plug in" to the grid for charging during low electricity consumption periods, releasing electricity during peak electricity consumption periods, effectively filling the power gap.
one
5G base station+energy storage
In the context of adapting to the new business requirements of 5G networks and assisting in the transformation of energy structure, the trend of "lithium-ion communication energy storage and lithium-ion intelligence" has become the trend. What if new infrastructure such as 5G also lacks power?
In terms of energy consumption, the peak power of 5G base stations is between 3-4 times that of 4G base stations, which significantly increases the demand for electricity. On the other hand, in the era of 2G, 3G, and 4G, site power is mainly passive response, lacking active planning, which can easily lead to resource waste.
Under higher electricity demand, how to improve the system operation efficiency of 5G base stations and reduce resource waste has become the focus of 5G construction. Therefore, the flexible, intelligent, and * * technical characteristics of electrochemical energy storage systems make them a suitable choice for backup power supply of 5G base stations.
174 China Unicom base stations and energy storage user sides are uniformly allocated according to the electricity needs of each area, achieving precise and orderly scheduling of electricity consumption, and ensuring safe and stable electricity supply throughout the county.
It is understood that in order to accelerate the construction of a modern comprehensive smart energy system, State Grid Jiashan County Power Supply Company has started exploring the "5G base station+energy storage" project since 2020. It has cooperated with enterprises such as Jiashan Unicom to transform the 5G base station energy storage equipment by replacing lithium iron phosphate batteries and building a monitoring platform for energy storage equipment, further improving the battery charging and discharging level, and providing services such as peak shaving and valley filling, and load response.
two
Data center+energy storage project
The energy storage system connected to the data center can enhance the power supply stability of the data center and prevent data loss caused by accidental power outages. The energy storage system improves the economy of data center power operation and low-carbon energy conservation through mechanisms such as peak shaving and valley filling, capacity allocation, etc.
1. Data center backend power supply
Traditional data centers require a large number of lead-acid batteries as backup power sources, but the battery status is unknown. In energy storage data centers, batteries are discharged every day, and the voltage after discharge is clear at a glance. It is easy to determine the quality of the batteries, which helps to eliminate defective batteries in a timely manner and saves the cost of conducting fake load tests every year.
2. Data center access for energy storage, energy conservation, and income generation
Connect to the energy storage system and arbitrage through the peak valley price difference of electricity bills. Making the data center no longer a simple power load, but with callable and adjustable power nodes, and even participating in grid frequency regulation, flexibly switching optimal modes that are conducive to grid, data center, and new energy generation, achieving energy conservation and emission reduction.
On January 28, 2021, the "Twelve Stations in One" comprehensive energy station in the Yangtze River Delta was put into operation in Wuxi. The entire station integrates 12 urban public facilities, including substations, energy storage stations, distributed photovoltaic stations, pre installed cold and hot supply stations, smart street lights, intelligent linkage unmanned inspection, data center computer rooms, 5G microstates, electric vehicle charging stations, electric vehicle exchange stations, exchange stations, and self-service washing stations.
three
Intercity rail transit+flywheel energy storage
Trains can store electrical energy through energy storage technology and release it in case of no contact network or emergency situations to ensure normal operation.
Subway+flywheel energy storage
The distance between urban rail transit stations is short, and trains frequently start and brake, making them a "major consumer of electricity" during operation. During the braking process (commonly known as "braking") of a train, a considerable amount of energy is generated, which has recycling value.
According to statistics, the energy generated by the braking of rail transit trains can reach about 20% -40% of the energy consumption of the traction system. If fully utilized, it will significantly reduce the energy consumption of rail transit operations.
Flywheel energy storage belongs to physical energy storage and adopts magnetic levitation technology. The flywheel rotor operates in a vacuum chamber without wind resistance. The flywheel energy storage device is installed in the traction substation of rail transit. When the train enters the station for braking, the flywheel absorbs energy and converts it into kinetic energy, with a speed of up to 20000 revolutions per minute; When the train accelerates out of the station, the flywheel releases energy, converting kinetic energy into electrical energy, which is released for use by the train and has excellent energy-saving and voltage stabilizing effects.
The flywheel energy storage device of Qingdao Metro can achieve a 15% reduction in traction energy consumption. After the two flywheel energy storage devices are put into use, it is expected to save about 500000 kilowatt hours of electricity annually, with a 30 year lifespan of 15 million kilowatt hours, and save about 10.65 million yuan in electricity bills. 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 the power supply system.
four
Optical storage charging station
In the era of high fuel costs and rising oil prices, new energy vehicles have become the choice of many car owners. Today, with the booming development of new energy vehicles, the construction of charging infrastructure is also gradually accelerating. As an energy supply facility to maintain the operation of new energy vehicles, new energy vehicle charging stations can be considered a legitimate trend. In the context of carbon neutrality, super charging stations covering "photovoltaic+energy storage+charging" are highly favored by local governments. The addition of energy storage can help solve some of the power generation redundancy and grid connection problems in the application process of photovoltaics, and on the other hand, it can leverage its combination advantages to drive the multi-directional development of photovoltaics, energy storage, and charging piles.
The charging station covers an area of 2100 square meters and can meet the needs of megawatt level energy storage systems and 1000V charging voltage platforms. This overcharging station mainly consists of photovoltaic systems, energy storage battery systems, new energy vehicle charging stations, online battery testing systems, and smart energy management cloud platforms.
five
Zero carbon smart park+energy storage
The factory park has a large area, with a large number of equipment such as cabinets and computer rooms. Therefore, electrical appliances have the characteristics of high useful power, long-term high load, and high equipment energy consumption. Moreover, industrial parks in China have a high electricity price difference, which is suitable for peak valley arbitrage of energy storage projects.
This is a large energy storage power plant with a power of 20 megawatts and a capacity of 160 megawatt hours, ranking first among commercial energy storage power plants in China. During the high temperature period in August, there is basically one or two days of 'discharge', and the demand response can last for over 10 days. Approximately 600000 kWh of electricity was released throughout August.
six
Hospital+energy storage backup power supply
Hospitals are key energy consuming units, and the daily electricity consumption under high temperatures in summer is equivalent to the total electricity consumption of 3000 normal families of four in a day. However, due to the special nature of hospitals serving life, every corner of the hospital, such as operating rooms, wards, emergency rooms, etc., is a channel for life, and there must be no operational problems. According to the survey, Wuhan Huoshen Mountain Hospital consumes up to 350000 kWh of electricity per day.
The energy storage project can serve as a UPS (uninterruptible power supply) function, ensuring that important loads in the hospital are not powered off, providing a solid power guarantee for the smooth operation of the hospital.
On December 31, 2018, the first phase of the 0.75MW/1.8MWh energy storage project at Fujian Magao Ai Memorial Hospital was successfully put into operation.
This project is an energy storage project for the hospital system in Fujian Province. It can achieve peak shaving and valley filling of the power grid during normal power supply, and can quickly disconnect the power grid in the event of a power outage. It also provides power for important loads of the hospital.
In order to improve electricity safety, improve energy utilization efficiency, and cope with power shortages during peak periods, Peking University International Hospital actively responds to national policies on energy conservation and emission reduction, and dares to try the application of new technologies. We signed an approximately 2.7MW energy storage power station project in the form of an energy management contract 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 reverse power supply to the high-voltage side to ensure the stability of electricity consumption.
In terms of economy, energy storage power stations adopt the form of energy management contracts, and the construction of idle space does not require hospital investment. Install energy storage power stations to store electricity during peak hours (batteries) and supply power to electricity loads during peak hours. Utilize the "peak valley electricity price difference" to reduce electricity bills for power users. The energy storage power station is expected to save electricity bills of 160000 yuan per year.
seven
Oil+Energy Storage
Major oil companies are deploying energy storage to accelerate energy transformation while helping the country achieve the "dual carbon" goal.
For the upstream field of oil and gas enterprises, building 'new energy power generation+distribution and storage' is a necessary path. The downstream field of 'refining enterprises+distribution and storage' also has many application prospects. It is understood that whether building wind power or photovoltaic power generation, enterprises must face the major challenges brought by renewable energy power generation - volatility and intermittency. How to obtain a continuous and stable clean power supply and ensure 24-hour normal production and living in oil areas, "distribution and storage" is the key.
Due to the field operation of the oil and gas testing team, they mainly rely on diesel generators for power supply, and there is no stable, fixed, and continuous economic power supply. This plan adopts a cost-effective lithium battery energy storage system to solve problems such as power supply discontinuity and battery neck usage.
The "Photovoltaic+Energy Storage" test project for the 31-18 well pad of Oil Production Plant 1 consists of 10.9 kilowatt photovoltaic panels, a lithium iron phosphate battery with a high starting power of 30 kilowatts and a 56 degree storage capacity, and an intelligent electronic control management device. A new energy management system from energy storage, power supply to electricity consumption has been preliminarily established. The main purpose of the experiment is to verify the capacity and power, charging and discharging performance, safety and stability of lithium iron phosphate batteries, as well as their application effect in the power supply process of single well oil production, and ultimately calculate the economic benefits of saving electricity bills.
eight
Energy storage+microgrid
Microgrids, also known as distributed energy island systems, systematically combine generators, loads, energy storage devices, and control devices to form a single controllable unit that simultaneously supplies electricity and heat to users.
Island microgrid
Micro grid+energy storage is suitable for remote areas where electricity is used, and some areas that cannot be covered by large grids, such as islands, remote mountainous areas, etc.
Sansha is far from Hainan Island, and it is not practical to transmit electricity to the islands and reefs through submarine cables. By establishing an intelligent microgrid on the island and fully utilizing energy sources such as photovoltaic, wind, and wave energy, traditional diesel consumption can be greatly reduced, which is in line with the development concept of the Three Sands.
The Sansha Intelligent Microgrid Energy Management System is an application demonstration project in the field of power technology in China, which has undergone three years of research and practice. The main station of this system is located on Yongxing Island, which can collect and monitor various load data such as diesel generators, photovoltaic systems, energy storage systems, main sub microgrids, seawater desalination, charging stations, etc. Since its trial operation in 2017, the system has achieved power supply stability rate *, voltage qualification rate *, clean energy consumption rate *, and saved hundreds of tons of diesel through the use of clean energy such as photovoltaic for over a year.
Beibu Island is located in the southeast of Xiapu County, surrounded by the sea on all sides, about 19 kilometers from the mainland. In order to make the production and living electricity consumption of Beibu Island more stable, State Grid Ningde Power Supply Company invested 5.06 million yuan in 2020 to build a photovoltaic energy storage microgrid on Beibu Island. The microgrid consists of two 10kV secondary power supply projects, with an estimated daily power generation of 224.24 kilowatt hours after production. The photovoltaic energy storage microgrid serves as a backup power source on the island, connected in parallel with the main land grid, providing emergency power for the stationed troops and hospitals, as well as providing production and living for villagers. With the official operation of the microgrid, the power supply capacity of Beibu Island will be greatly improved.
nine
Wind and solar energy+energy storage
The previous discussions were all about energy storage on the electricity consumption side, while on the power generation side, the proportion of new energy generation and storage is gradually increasing. In some regions, mandatory energy distribution and storage have also opened up a development path for models such as shared energy storage.
Since 2021, a total of 24 provinces and regions in China have issued new energy distribution and storage policies, among which many places have put forward clear requirements for the construction of distributed photovoltaic supporting energy storage. Among these numerous documents, Shandong Zaozhuang has a high requirement for energy storage capacity, which is 15% to 30% of the installed capacity, with a duration of 2-4 hours.
The 50 MW "Photovoltaic+Energy Storage" Comprehensive Energy Demonstration Project in Shigatse City, Tibet is connected to the grid for power generation. The project covers an area of approximately 1600 acres, with a total investment of approximately 450 million RMB, and is expected to generate up to 100 million kilowatt hours of electricity annually.
ten
Shared energy storage+power grid
Shared energy storage refers to the literal meaning, similar to shared bicycles and shared power banks, where capital independent of the operator is responsible for building new energy storage power stations and renting them out to the power station operator.
Whether it's photovoltaic or wind power, due to objective factors, power generation fluctuates greatly and is prone to impact the power grid. Therefore, energy storage is needed for allocation. Currently, thermal power generation is still the main method in China, and new energy generation accounts for a relatively small proportion, so it can still cope with it. However, with the increasing proportion of new energy generation in the future, large-scale configuration of energy storage is also imperative.
So, some regions have mandatory requirements that energy storage must be configured for building new energy power stations! Against the backdrop of high energy storage materials represented by lithium, forced energy storage will further compress the profits of investors and operators of new energy power plants.
In order to solve this problem, "shared energy storage" has emerged. Energy storage power stations can both rent out capacity and participate in spot electricity trading to arbitrage, effectively solving cost problems and promoting the further popularization of energy storage systems. After all, energy storage and photovoltaic wind power are complementary, and without large-scale supporting energy storage, it is impossible to fully apply new energy for power generation.
In traditional power systems, the electricity output curve is relatively stable, but the electricity consumption curve (demand curve) experiences multiple peaks and valleys within a day, making it difficult to match the supply and demand curve of the power system.
The energy storage on the power grid side is connected to the transmission or distribution network, and is uniformly dispatched by the power grid company. It can independently participate in the regulation of the power grid. The peak shaving and energy storage system of the power grid achieves peak shaving and frequency regulation through high storage and low discharge, ensuring the stability of the power grid. At the same time, it can also improve the transmission capacity of the power grid, alleviate congestion, and serve as an emergency backup power source in case of a malfunction.
On March 1, 2022, a new type of power system with the development of clean energy as the main focus, the Jiangbei Energy Storage Power Station, a "power bank" of Nanjing * University, entered the equipment acceptance stage and is expected to be officially put into operation in May.
The Jiangbei Energy Storage Power Station, located on Xinke 12th Road in Jiangbei New District, Nanjing, covers an area of 51.26 acres, with a large charging and discharging power of 110.88 megawatts and a storage capacity of 193.6 megawatt hours, which can store approximately 190000 kilowatt hours of electricity. Energy storage stations "plug in" to the grid for charging during low electricity consumption periods, releasing electricity during peak electricity consumption periods, effectively filling the power gap.
