The latest energy storage solutions for 2024

1. Power generation side solutions

Power generation side energy storage systems are divided into centralized and decentralized types. They can improve the problems of limited power generation from photovoltaic and wind power, improve economic efficiency, reduce the instantaneous power change rate, and reduce the impact on the power grid.

1. Energy storage solutions for wind power plants

Energy storage systems can improve existing wind power plants with higher feed-in tariffs, solve the problem of wind power curtailment, eliminate random fluctuations in wind power, improve the quality of power output from wind power plants, and enable wind power to become dispatchable power that can participate in peak regulation and frequency regulation.

Reduce wind power curtailment and improve profitability.

Smooth out random fluctuations in output and improve power quality.

Improve the accuracy of power forecasts and reduce grid impact.

Energy storage in wind farms can participate in ancillary services.

2. Combined frequency modulation solution for thermal power plants

The energy storage system has the advantages of fast response, high precision, and accurate regulation. Combined frequency modulation with thermal power plants can compensate for the frequency modulation characteristics of thermal power units, which are slow, have low precision, and incorrect direction (overshoot).

· Fast

· High precision

· Accurate regulation

3. Energy storage solutions for photovoltaic power plants

Energy storage systems can improve existing photovoltaic power plants with high feed-in tariffs. They can solve the problem of curtailment of photovoltaic power, eliminate random fluctuations in photovoltaic power, improve the quality of power output from photovoltaic power plants, enable photovoltaic power to become dispatchable power, and participate in ancillary services such as peak regulation and frequency regulation.

· Reduce curtailment and improve economics

· Improve power prediction accuracy and reduce grid impact

· Smooth random fluctuations in power and improve power quality

· Energy storage in photovoltaic power plants participates in ancillary services

AC busbar solution

2. Grid-side energy storage solution

With the substantial integration of new energy sources exacerbating imbalances on the power generation side and the daily, seasonal and diurnal peaks on the user side still increasing, the role of grid-side energy storage is becoming more prominent. Grid-side energy storage is an effective regulating tool for ancillary services and can promote the process of marketization of the power industry and spot trading of electricity.

1. Grid energy storage solution

The energy storage system can achieve peak regulation and frequency regulation, monitor load fluctuations in real time, respond quickly to grid dispatching, and improve grid frequency stability. The energy storage system can also dynamically adjust grid reactive power according to grid power factor changes, reduce system losses, and ensure reliable grid operation.

· Power frequency regulation and peak regulation

· Independent participation in ancillary services

· Secondary frequency regulation, paid peak regulation, AVC, spinning reserve, cold reserve, black start

2. User-side solution

Combining photovoltaics and energy storage systems, it can effectively manage the energy cycle of households and industrial and commercial enterprises by producing, storing and consuming energy. It is an important part of the future smart energy system.

3. Household photovoltaic and energy storage solution

It can provide households with stable, reliable, safe and economical power through the photovoltaic + energy storage model.

1. Compatible with lithium-ion batteries and lead-acid batteries

2. Flexible compatibility with high-voltage and low-voltage batteries

3. Household smart energy management terminal

4. Power dispatch and demand-side response management node

5. Distributed virtual power plant node

4. Household AC coupling system solution

As more and more households are equipped with photovoltaic systems, it is necessary to add energy storage to the original system. Without changing the original equipment installation conditions, energy storage converter equipment can be added directly to the AC side to meet household energy storage needs.

Small energy storage converters can be used with any ordinary single-phase photovoltaic grid-connected inverter to form a photovoltaic energy storage system.

5. Energy storage solutions for industry and commerce

Energy storage systems can be used to achieve peak-valley arbitrage in industry and commerce where the peak-valley price difference is large. In addition, industrial and commercial energy storage can also reduce transformer capacity fees, reduce maximum transformer demand electricity fees, delay the construction of distribution capacity expansion, save costs, and serve as a backup power supply to improve power supply reliability.

· Peak shaving and valley filling.

· Management of maximum transformer demand.

· Alternative to transformer capacity expansion with capacity constraints.

· Reactive power compensation and APF to improve power quality.

· The PCS has its own isolation transformer, is highly adaptable to loads, highly reliable, and more suitable for industrial and commercial applications.

· It can participate in demand-side response and auxiliary services such as frequency modulation and peak shaving for power dispatching.

· Integrated energy efficiency management.

3. Microgrid solutions

A microgrid system is a power generation and distribution system that can achieve self-control, protection and management according to predetermined goals. It can either operate in conjunction with an external power grid to form a networked microgrid, or operate in isolation to form an independent microgrid. Energy storage systems are an indispensable unit in microgrids, which can achieve power balance within the microgrid, provide stable power for the load, improve power reliability, and enable seamless switching between grid-connected and off-grid operation.

1. Grid-connected microgrid solutions

Energy storage plays the role of stabilizer and regulator in the integrated use of energy sources such as wind, light, biomass, gas, and storage. The large-scale connection of distributed power sources to the distribution network will have a certain impact on the power quality, power supply reliability, network losses and safe operation of the grid. There is a peak-valley price difference in user electricity consumption. Implementing distributed microgrid energy storage in the distribution network can regulate the coordinated operation of distributed power sources and loads, compensate for the negative impact of the random power output of distributed power sources on grid safety and economic operation, and realize arbitrage of peak-valley price differences. It can also participate in primary frequency regulation, automatic generation control, peak regulation, reactive power regulation, backup, black start and other auxiliary services of the power grid.

· Multi-energy input, basically achieving self-generation and self-use, reducing reliance on the large power grid.

· Highly efficient and flexible, suitable for a variety of renewable energy generation systems.

· AC busbar connection for centralized management.

· The energy storage system can achieve black start for the microgrid.

2. Off-grid microgrid solution

Remote areas are difficult to cover with traditional power grids, but they are rich in local light or wind resources, making them ideal for establishing independent light (wind) storage diesel microgrids to solve local power consumption problems.

· High-power (MW or above) independent microgrids with an AC busbar solution to reduce coupling between input sources and improve reliability.

· The system operates under off-grid regulation, with an energy storage system or diesel generator providing 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 system.

4. Solar-storage-charging system solution

The “solar-storage-charging” integrated charging station adds systems such as photovoltaic power generation, energy storage systems, and emergency charging to the charging station to enable intelligent interaction with the power grid. It plays a key role in assisting the power grid in peak regulation, smoothing output power, and improving power grid stability.

1. DC bus wiring scheme

The DC bus solution for the integrated photovoltaic power station uses a DC bus power supply structure. The DC bus mainly provides charging power for the DC pile, and the DC bus voltage is converted to a matching voltage range for charging new energy vehicles through a DC/DC charging module. The DC bus power can be sourced from the power grid, photovoltaic power generation system and energy storage system, respectively using AC/DC bidirectional converters, photovoltaic MPPT controllers and DC/DC bidirectional converters for power conversion.

· DC coupling reduces the loss of direct conversion.

· Photovoltaic direct supply charging pile improves the utilization rate of new energy.

· The energy storage system reduces peak demand and fills valley demand, reducing the distribution capacity of the power grid.

· Solves the problem of power distribution expansion.

2. AC busbar solution

AC busbar solution for integrated photovoltaic, energy storage and charging power stations is currently a commonly used photovoltaic, energy storage and charging solution, and is widely used in expanding charging station systems and multi-energy complementary applications.

It can realize an integrated photovoltaic, energy storage and battery container solution.

It has a wide range of access power and flexible design.

It can be used for power supply in areas without electricity, integrated photovoltaic, energy storage and charging applications, industrial park electricity sales, large charging stations and other microgrid applications.

The energy storage system can reduce peak demand and shift load, reducing the distribution capacity of the

5. 5G communication base station solution

The 5G era is accelerating, and driven by policies, technology, and market demand, China's 5G industry is developing rapidly and has been applied in various fields. According to market demand, in 2020, there will be a large 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, and about 80% of this energy consumption will come from widely distributed base stations.

1. 5G communication base station solution

In areas with a large power grid, base station energy storage can be used as a backup power supply and participate in peak-valley arbitrage. In areas without a large power grid, base station energy storage can work with wind power and photovoltaics to provide stable, reliable and safe power for the base station.

· Lithium batteries can replace lead-acid batteries, and lithium elevator secondary batteries can also be used.

· As load capacity requirements increase, energy storage can be used to delay the expansion of power distribution.

· Peak shaving and valley filling can increase revenue.