In 2014, as energy demand continues to rise, energy storage technology is experiencing unprecedented rapid development. As a key node at the intersection of energy storage technology innovation and market demand, a series of innovative energy storage solutions have also emerged.
This paper aims at an in-depth analysis of the latest energy storage solutions in 2024, detailing their unique technical advantages and broad application prospects.
Power generation side solution
The energy storage system on the power generation side is divided into centralized type and decentralized type, which can improve the problem of PV and wind power generation limits and improve the economy; Reduce instantaneous power change rate and reduce grid shocks.
Energy storage solutions for wind power stations
The energy storage system can improve the existing wind power stations with high electricity prices, solve the phenomenon of wind abandonment, eliminate random fluctuations of wind power, improve the power output quality of wind power plants, make wind power a dispatchable power, and participate in peak and frequency regulation.
- Reduce curtailment and improve economy.
- Smooths random output fluctuations and improves power quality.
- Improve power prediction accuracy and reduce power grid impact.
- Wind farm energy storage participates in auxiliary services.
Joint frequency modulation solution for thermal power station
The energy storage system has the advantages of rapid response, high precision, accurate adjustment, etc. Joint frequency modulation with the thermal power station can compensate for the frequency modulation characteristics of the thermal power unit, such as slow speed, low precision and misdirection (overhoot).
Photovoltaic power station energy storage solutions
The energy storage system can improve existing photovoltaic power plants with high electricity prices, which aims to solve the phenomenon of abandoned light in photovoltaic power stations, eliminate random fluctuations in photovoltaic power, improve the power output quality of photovoltaic power plants. Also it can make photovoltaic power dispatchable power, and can participate in auxiliary services such as peak regulation and frequency regulation.
- Reduce light discard, improve economy
- Improve power prediction accuracy and reduce power grid impact
- Smooths random power fluctuations and improves power quality
- Photovoltaic power station energy storage participate in auxiliary services
Power grid side energy storage solution
As large-scale access to new energy exacerbates the imbalance on the power generation side and the daily peak-valley difference and seasonal peak-valley difference on the user side are still increasing, the role of grid-side energy storage is more prominent. Grid-side energy storage is an effective adjustment tool for auxiliary services and can promote the process of power marketization and spot power trading.
Power grid energy storage solutions
The energy storage system can achieve peak and frequency regulation control, real-time monitoring of load fluctuations, rapid response to grid scheduling, and improve the stability of grid frequency. The energy storage system can also dynamically adjust the grid reactive power according to power factor changes, reduce system losses, and ensure the reliable operation of the grid.
- power frequency and peak regulation
- Participate independently in supporting services
- Secondary frequency modulation, paid peak regulation, AVC, rotary reserve, cold reserve, black start
User side solution
Combined with photovoltaic and energy storage systems, the energy cycle of residential energy storage, industrial energy storage and commercial energy storage systems can be effectively managed by production, storage, consumption, which is an important part of the smart energy system in the future.
Household photovoltaic storage solutions
It can provide stable, reliable, safe and economical power for families through photovoltaic energy storage.
- Compatible with lithium-ion and lead-acid batteries
- Compatible with high and low voltage batteries
- Smart home energy management terminal
- Power dispatching and demand-side response management node
- Distributed virtual power plant node
AC coupling system solutions for households
As more and more families are equipped with photovoltaic systems, it is necessary to install energy storage in the original system, and install energy storage converter equipment directly on the AC side without changing the installation conditions of the original equipment, which can meet the needs of household energy storage.
The small energy storage converter can be used with any ordinary single-phase photovoltaic grid-connected inverter to form a photovoltaic energy storage system.
Industrial and commercial energy storage solutions
Industrial and commercial energy storage systems can be used to achieve peak valley arbitrage. In addition, industrial and commercial energy storage can also reduce transformer capacity charges, reduce the maximum demand for transformer electricity, delay the construction of distribution capacity, save costs, and as a backup power supply, improve the reliability of power supply.
- Cut peaks and fill valleys.
- Transformer maximum demand management.
- Transformer capacity limited expansion replacement.
- Reactive power compensation and APF improve power quality.
- PCS comes with isolation transformer, strong load adaptability, high reliability, more suitable for industrial and commercial applications.
- Participate in the auxiliary services of demand side response and power dispatching frequency and peak regulation.
- Integrated energy efficiency management.
Microgrid solutions
Microgrid system 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 power grid to form a networked microgrid, or it can be isolated to form an independent microgrid. Energy storage system is an indispensable unit in microgrid, which can achieve internal power balance, provide stable power for load, improve power reliability, and realize seamless switching between grid-connected and off-grid.
Grid-connected microgrid solution
In the integrated energy utilization of wind, light, biomass, gas and storage, energy storage plays the role of stabilizer and regulator. A large number of distributed power sources connected to the distribution network will have a certain impact on power quality, reliability of power supply, network loss and safe operation of the grid.
There is a peak-valley price difference in user power consumption. Distributed microgrid energy storage should be implemented in the distribution network to regulate distributed power sources and cooperative load operation, so as to compensate for the negative impact of random output of distributed power sources on the safety and economic operation of the grid.
And can realize peak valley spread arbitrage, participate in power grid primary frequency modulation, automatic generation control, peak regulation, reactive power regulation, standby, black start and other auxiliary services.
- Multi-energy input, basically achieve self-use to reduce dependence on large power grids.
- Efficient and flexible, suitable for a variety of renewable energy generation systems.
- AC bus connection for centralized management.
- Energy storage system can realize micro-grid black start.
Off-grid microgrid solution
In remote areas, the traditional power grid is difficult to cover, but the local light resources are rich, or the wind resources are rich, which is very suitable for the establishment of light (wind) energy storage independent microgrid to solve the local power problem.
- High power (MW or above) independent micro-grid, AC bus scheme reduces the coupling of each input source, improve reliability.
- The system operates under off-grid regulation. Energy storage systems or diesel generators provide voltage and frequency support for the entire microgrid.
- The energy management system (EMS) analyzes and forecasts the power usage of photovoltaic, wind power, and load to realize the safe, reliable and economical operation of the microgrid system.
Solar-storage-charging system solution
The “solar-storage-charging system solution” integrated charging station adds photovoltaic power generation, energy storage system, emergency charging and other systems to the grid intelligent interaction on the basis of the charging station, and plays a key role in assisting the grid peak regulation, smooth power output, and improving the stability of the grid.
DC bus wiring scheme
The integrated DC bus solution for solar storage and charging uses the architecture of DC bus power supply. The DC bus mainly provides charging power for the DC pile. Through the DC/DC charging module, the DC current on the DC bus is converted into the matching voltage range with the charging of new energy vehicles. DC bus power can come from the grid, photovoltaic power generation system and energy storage system, respectively, using AC/DC bidirectional converter, photovoltaic MPPT controller, DC/DC bidirectional converter for power conversion.
- DC coupling to reduce DCI conversion loss.
- Direct photovoltaic charging pile, improve the utilization rate of new energy.
- The energy storage system peaking and valley filling reduces the power distribution capacity.
- Solves power distribution and capacity expansion problems.
AC bus solution
AC bus solution for integrated solar storage and charging stations is a common solar storage and charging solution at present, which is widely used in the expansion of charging station systems and the application of multi-energy complementary systems.
- Realize the integrated container solution of photovoltaic, energy storage and battery.
- Large access power range, flexible design.
- Can be used for power supply in no-power areas, integrated optical storage and charging applications, power sales in industrial parks, large charging stations and other micro-grid applications.
5G communication base station solution
The 5G era is accelerating, driven by policy, technology and market demand. China’s 5G industry is developing rapidly and has been applied to various fields. According to market demand, in 2020, the construction tide of 5G base stations has formed, 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 single 4G station. By 2025, the communications industry will consume 20% of the world’s electricity, of which about 80% comes from widely distributed base stations.
5G communication base station solution
In the area with a large power grid, the base station energy storage can be used as a backup power supply and participate in peak and valley arbitrage. In the area without a large power grid, the base station energy storage can cooperate with wind power and photovoltaic to provide stable, reliable and safe power for the base station.
- Lithium batteries replace lead-acid batteries, and lithium elevator batteries can be used.
- As load capacity requirements increase, energy storage is used to delay distribution capacity expansion.
- Cut peaks and fill valleys to increase profits.
- The energy storage system clips peaks and fills valleys, reduces the power distribution capacity, and solves the problem of power distribution expansion.
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