In the second half of the new energy track, Avnet focuses on "wind and solar storage and charging"

After years of development, new energy power generation represented by wind and solar power has been widely used. According to data from the National Energy Administration, China's wind power and photovoltaic power generation exceeded 1 trillion kilowatt hours for the first time in 2022, reaching 1.19 trillion kilowatt hours, which is 1.19 trillion kilowatt hours compared with 2021. The annual increase was 207.3 billion kilowatt-hours, a year-on-year increase of 21%, accounting for 13.8% of the total social electricity consumption, a year-on-year increase of 2 percentage points.

However, with the large-scale integration of wind and solar energy into the power grid, while improving the power supply structure, the impact of volatility and intermittent defects is also increasing. Therefore, storage and charging technology plays a key role in the large-scale and high-quality development of renewable energy sources such as wind and solar. The core application of storage and charging technology is to solve the problem of unstable new energy power generation. It can be widely used on the power generation side, grid side and power consumption side. On the power generation side, energy storage can smooth the output of renewable energy and improve the flexibility of unit dispatch; on the power grid side, energy storage can reduce transmission losses through peak shaving and frequency modulation; on the power consumption side, it can optimize electricity expenses and improve power quality.

Currently, as the application proportion of wind and solar power generation continues to increase, local governments have successively issued guidance documents emphasizing the important role of energy storage. In the new power structure, more and more attention will be paid to the construction of energy storage systems. By then, modular and commercial energy storage models may usher in an explosion.

In the context of global carbon emission reduction, countries are actively promoting energy reform. The "wind, solar, and storage" applications of new energy systems and related energy facilities will become the focus of global technology competition. In the construction of new energy systems, the integrated and coordinated development of wind, solar, storage and charging has been generally recognized by the industry.

As the name suggests, wind, solar, storage and charging integration combines four technologies: solar energy, wind energy, energy storage batteries and charging control systems to achieve more efficient and environmentally friendly energy utilization. The integration of wind, solar, storage and charging technology can not only effectively solve the intermittent problem of wind and solar energy and improve the reliability of the power system, but also flexibly allocate charging power, providing more possibilities for grid regulation.

At present, "wind and solar storage and charging" are gradually being promoted from demonstration bases to nationwide implementation. According to statistics from the International Energy Network, as of the end of 2022, China has signed or planned 83 wind and solar storage projects, with a confirmed project scale of 191.553GW, and confirmed investments. The amount is 663.346 billion yuan. It can be seen that a large market of 100 billion yuan in wind and solar storage and charging has been formed. At the same time, as wind and solar storage and charging projects are being vigorously promoted, new power grids that integrate light, electricity, storage, charging and other systems have also attracted much attention in the industry. They achieve a balance between production and supply through the complementation of multiple energy sources, and are new energy sources. An important part of system construction.

At present, it has become a consensus around the world to fully develop wind and solar energy storage and charging, and various countries have introduced policies and measures to support renewable energy and energy storage. For example, in China’s “14th Five-Year Plan”, it proposed to increase support for wind and solar storage and charging. At the same time, the European Union has also set a series of goals, such as achieving 100% renewable energy consumption by 2030. The introduction of these favorable policies has also injected a boost into the development of the wind and solar storage and charging field.

· PCS (energy storage converter), also known as bidirectional energy storage inverter, is the core component that realizes the two-way flow of electric energy between the energy storage system and the power grid. Usually PCS is composed of DC/AC bidirectional converter, bidirectional DC/DC step-up and step-down device, control unit, etc. The PCS controller receives background control instructions through communication, controls the converter to charge or discharge the battery according to the instructions, and adjusts the active power and reactive power of the power grid.

· BMS (battery management system) consists of monitoring module, control module, communication module and other parts. In energy storage systems, it is responsible for real-time monitoring and management of battery power, health, and safety. By monitoring key parameters such as battery voltage, current and temperature in real time, BMS ensures that the battery operates within a safe and effective range. At the same time, it will also conduct a comprehensive assessment of the battery status, predict its life based on the battery's charging cycle and aging degree, and provide users with valuable maintenance strategies. Moreover, once abnormal conditions such as battery overheating, overcharge, overdischarge, or short circuit are detected, the power supply is immediately cut off or a warning is issued to prevent potential safety risks.

· Bidirectional battery charging and discharging technology allows the battery to both receive and release electric energy, which is regarded as an important part of the development of distributed energy storage. A typical application of battery bidirectional charging and discharging technology is V2G (Vehicle to Grid), which uses the large-capacity battery equipped with electric vehicles to achieve on-demand charging/discharging. For example, during periods of low grid demand, electric vehicles draw energy from the grid and store it. During periods of peak grid demand, electric vehicles can feed part of the power back to the grid or serve as a power source to power other appliances.

In the future, with the advancement of technological innovation, large-scale application, strong policy support and changes in business models, wind and solar storage and charging will play a greater value. During this process, Avnet will continue to increase research and development, technical support, and market investment in this field, and use its outstanding leadership capabilities to fully promote the development of the wind and solar storage and charging industry, making important contributions to the global new energy transformation.