Introduction to the most comprehensive energy storage solutions
2025-01-09
Energy storage solutions play an increasingly important role in the current energy industry, providing more efficient, reliable and sustainable solutions for energy systems.
This article will discuss grid-side energy storage solutions, home energy storage solutions, industrial and commercial energy storage solutions, photovoltaic storage and charging fusion solutions, and microgrid system solutions.
1. Energy storage solutions on the power generation side
Energy storage solutions on the power generation side are divided into centralized and decentralized types, which can improve the problem of photovoltaic and wind power generation restrictions and improve economic efficiency; reduce the instantaneous power change rate and reduce grid shock.
(1). Wind power station energy storage solution
Energy storage solutions can improve existing wind power stations with high on-grid electricity prices, solve the problem of wind abandonment, eliminate random fluctuations in wind power, improve the quality of wind power plant power output, make wind power dispatchable power, and participate in peak and frequency regulation.
- Reduce wind abandonment and improve economic efficiency
- Smooth random fluctuations in output, improve power quality
- Improve power prediction accuracy, and reduce grid shock
- Wind farm energy storage participates in auxiliary services
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(2). Thermal power station joint frequency regulation energy storage solution
Energy storage solution has the advantages of rapid response, high precision, and accurate regulation. It can be used in conjunction with thermal power stations for joint frequency regulation to make up for the frequency regulation characteristics of thermal power units, such as slow speed, low precision, and wrong direction (overregulation).
(3). Photovoltaic power station energy storage solution
Energy storage solutions can improve existing photovoltaic power stations with high on-grid electricity prices. Solve the problem of photovoltaic power station abandonment, eliminate random fluctuations in photovoltaic power, improve the quality of photovoltaic power plant power output, make photovoltaic power dispatchable power, and participate in auxiliary services such as peak load regulation and frequency regulation.
- Reduce abandoned light and improve economic efficiency
- Improve power prediction accuracy and reduce grid impact
- Smooth random power fluctuations and improve power quality
- Photovoltaic power station energy storage participates in auxiliary services
DC bus solutions
AC busbar solutions
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2. Grid-side energy storage solutions
As the large-scale access of new energy sources exacerbates the imbalance on the power generation side and the daily peak-to-valley difference and seasonal peak-to-valley difference on the user side are still increasing, the role of grid-side energy storage solutions has become more prominent. Grid-side energy storage solutions are effective adjustment tools for auxiliary services and can promote the process of electricity marketization and electricity spot trading.
(1).Grid energy storage solutions
Energy storage solutions can achieve peak and frequency regulation control, monitor load fluctuations in real time, respond quickly to grid dispatch, and improve grid frequency stability. The energy storage system can also dynamically adjust the grid reactive power according to the change of grid power factor, reduce system losses, and ensure reliable operation of the grid.
- Power frequency regulation and peak regulation
- Independent participation in auxiliary services
- Secondary frequency regulation, paid peak regulation, AVC, spinning reserve, cold reserve, black start
(2). Home energy storage solution
Combining photovoltaic and energy storage systems, it is possible to effectively manage the energy cycle of households and industry and commerce through production, storage and consumption, which is an important part of the future smart energy system.
(3). Household photovoltaic plus energy storage solution
It can provide stable, reliable, safe and economical electricity for households through the photovoltaic + energy storage model.
- Compatible with lithium-ion batteries and lead-acid batteries
- Flexible compatibility of high-voltage and low-voltage batteries
- Home smart energy management terminal
- Power dispatch and demand-side response management node
- Distributed virtual power plant node
(4). Energy storage solution for household AC coupling system
As more and more households are equipped with photovoltaic systems, energy storage needs to be added to the original system. Without changing the installation conditions of the original equipment, energy storage inverter equipment can be directly installed on the AC side to meet the household energy storage needs.
Small energy storage inverters can be used with any ordinary single-phase photovoltaic grid-connected inverter to form a photovoltaic energy storage solution.
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(5). Industrial and commercial energy storage solutions
Industrial and commercial enterprises with large peak-valley electricity price differences can use energy storage systems to achieve peak-valley arbitrage. In addition, industrial and commercial energy storage can also reduce transformer capacity fees, reduce transformer maximum demand electricity fees, delay distribution capacity expansion construction, save expenses, and serve as a backup power source to improve power supply reliability.
Peak shaving and valley filling.
Transformer maximum demand management.
Transformer capacity limited expansion replacement.
Reactive power compensation and APF improve power quality.
PCS comes with an isolation transformer, which has strong load adaptability and high reliability, and is more suitable for industrial and commercial applications.
Can participate in demand-side response and auxiliary services for power dispatching, frequency regulation and peak regulation.
Comprehensive energy efficiency management.
Transformer maximum demand management.
Transformer capacity limited expansion replacement.
Reactive power compensation and APF improve power quality.
PCS comes with an isolation transformer, which has strong load adaptability and high reliability, and is more suitable for industrial and commercial applications.
Can participate in demand-side response and auxiliary services for power dispatching, frequency regulation and peak regulation.
Comprehensive energy efficiency management.
3. Microgrid Energy Storage Solution
The microgrid energy storage solution is a power generation and distribution system that can achieve self-control, protection and management according to predetermined goals. It can be connected to the external grid to form a networked microgrid, or it can be isolated to form an independent microgrid. The energy storage system is an indispensable unit in the microgrid. It can achieve internal power balance in the microgrid, provide stable power for the load, improve power reliability, and achieve seamless switching between grid-connected and off-grid.
(1). Grid-connected microgrid energy storage solution
Energy storage plays the role of stabilizer and regulator in the comprehensive energy utilization of wind, light, biomass, gas, and storage. The large-scale access of distributed power sources to the distribution network will have a certain impact on the power quality, power supply reliability, network loss and safe operation of the power grid. There is a peak-valley price difference in user electricity consumption. Distributed microgrid energy storage is implemented in the distribution network to regulate the coordinated operation of distributed power sources and loads, and to make up for the negative impact of the randomness of distributed power output on the safety and economic operation of the power grid. It can also achieve peak-valley price arbitrage and participate in auxiliary services such as primary frequency regulation, automatic power generation control, peak regulation, reactive power regulation, standby, and black start of the power grid.
- Multi-energy input, basically realize self-generation and self-use to reduce dependence on large power grids.
- Efficient and flexible, suitable for a variety of renewable energy power generation systems
- AC bus connection, convenient for centralized management.
- The energy storage system can realize the black start of the microgrid.
(2).Off-grid microgrid solution
Remote areas are difficult to cover with traditional power grids, but the local light resources are abundant or the wind resources are abundant, which is very suitable for building independent microgrids with solar (wind) and diesel storage to solve local electricity problems.
For high-power (MW level and above) independent microgrids, the AC bus solution reduces the input source and improves reliability.
The system operates under off-grid regulation, and the energy storage system or diesel generator provides voltage and frequency support for the entire microgrid. The energy management system (EMS) analyzes and predicts the power usage of photovoltaic, wind power, and loads to achieve safe, reliable and economical operation of the microgrid.
The system operates under off-grid regulation, and the energy storage system or diesel generator provides voltage and frequency support for the entire microgrid. The energy management system (EMS) analyzes and predicts the power usage of photovoltaic, wind power, and loads to achieve safe, reliable and economical operation of the microgrid.
4. Energy storage solution for photovoltaic storage and charging system
The integrated charging station of "photovoltaic storage and charging" adds photovoltaic power generation, energy storage system, emergency charging and other systems on the basis of the charging station for intelligent grid interaction, which plays a key role in assisting the grid to peak-shift, smooth the output of electric energy and improve the stability of the grid.
(1). DC bus wiring energy storage solution
The DC bus solution of the integrated photovoltaic storage and charging power station adopts the DC bus power supply architecture. The DC bus mainly provides charging power for the DC pile. The DC power on the DC bus is converted into a matching voltage range for charging new energy vehicles through the DC/DC charging module. The DC bus power can come from the power grid, photovoltaic power generation system and energy storage system, and the AC/DC bidirectional converter photovoltaic MPPT controller and DC/DC bidirectional converter are used for power conversion
DC coupling reduces the loss of direct-to-alternating conversion.
Photovoltaic direct supply charging pile improves the utilization rate of new energy.
The energy storage system cuts peaks and fills valleys, reducing electricity
Photovoltaic direct supply charging pile improves the utilization rate of new energy.
The energy storage system cuts peaks and fills valleys, reducing electricity
(2). AC busbar energy storage solution
The AC busbar energy storage solution of the integrated photovoltaic storage and charging power station is currently a more commonly used photovoltaic storage and charging energy storage solution. It is widely used in the expansion of charging station systems and multi-energy complementary applications of the system, and can realize photovoltaic, energy storage, and battery integrated container solutions.
Wide access power range and flexible design:
It can be used for power supply in areas without electricity, integrated photovoltaic storage and charging applications, power sales in industrial parks, large charging stations and other microgrid applications.
The energy storage system reduces peaks and valleys, reduces the power distribution capacity of the power grid, and solves the problem of power distribution expansion.
It can be used for power supply in areas without electricity, integrated photovoltaic storage and charging applications, power sales in industrial parks, large charging stations and other microgrid applications.
The energy storage system reduces peaks and valleys, reduces the power distribution capacity of the power grid, and solves the problem of power distribution expansion.
5. Energy storage solutions for 5G communication base stations
The 5G era is accelerating. Driven by policies, technologies and market demands, my country's 5G industry is developing rapidly and has been applied to various fields. According to market demand, in 2020, there will be a wave of 5G base station construction. 5G base stations process large amounts of data, and the power consumption of a single station is 2.5 to 3.5 times that of a 4G single station. By 2025, the communications industry will consume 20% of the world's electricity, of which about 80% comes from widely distributed base stations.
(1). Energy storage solutions for 5G communication base stations
In areas with large power grids, base station energy storage can be used as a backup power source and participate in peak-valley arbitrage. In areas without large power grids, base station energy storage can cooperate with wind power and photovoltaics to provide stable, reliable and safe power for base stations.
Lithium batteries replace lead-acid batteries, and lithium-ion secondary batteries can be used.
As the demand for load capacity increases, energy storage is used to delay the expansion of power distribution.
Peak shaving and valley filling to increase revenue.
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