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Application Case
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NEWS
All Vanadium Flow Battery - A Strong Competitor for Long Term Energy Storage
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Release time:
2024-03-13 17:50
Guided by the "dual carbon" goals, China's new energy industry has ushered in a new era of rapid development. Renewable energy, represented by photovoltaic and wind power, is rapidly changing our energy landscape. With the rapid increase in the proportion of renewable energy generation connected to the grid,
Guided by the "dual carbon" goals, China's new energy industry has ushered in a new era of rapid development. Renewable energy, represented by photovoltaic and wind power, is rapidly changing our energy landscape. With the rapid increase in the proportion of renewable energy generation connected to the grid, the "dual randomness" and "double peaks and double heights" characteristics of the power system are becoming increasingly prominent, and the power grid is facing pressure on consumption and operational safety challenges.
To ensure the stability, economic dispatch, and high quality of electricity in the power system, and further form a controllable and dispatchable power grid, the power system needs to be equipped with energy storage to make renewable energy a more friendly and high-quality new energy source.
As the penetration rate of renewable energy gradually increases, the mismatch of time and space in renewable energy generation such as photovoltaics and wind power is becoming increasingly prominent, further fueling the demand for long-term energy storage scheduling in the power system. Long term energy storage (energy storage technology with a continuous discharge time of more than 4 hours) can enhance the consumption capacity of renewable energy generation and effectively reduce the consumption pressure and operating costs of the power system. Vanadium flow batteries (hereinafter referred to as "vanadium batteries"), which have advantages such as high inherent material safety, long cycle life, recyclable electrolyte, high cost-effectiveness, and environmental friendliness, may stand out in the field of long-term energy storage.
Energy storage is indispensable in the wave of new energy
In recent years, the demand for renewable energy has become increasingly urgent. Renewable energy sources such as photovoltaics and wind power are leading the future energy revolution with their unique advantages and enormous potential. With the increasing proportion of renewable energy in the power grid, Battery Energy Storage System (BESS) will play an increasingly crucial role between renewable energy supply and grid load, becoming an indispensable technology for accelerating the replacement of traditional fossil fuels with renewable energy.
According to the different principles and technologies of energy storage, energy storage technology can be divided into three categories: electric energy storage, thermal energy storage, and hydrogen energy storage. The energy storage technology industry, excluding pumped storage, is collectively referred to as new energy storage, mainly including lithium-ion batteries, flow batteries, compressed air energy storage, flywheel energy storage, hydrogen (ammonia) energy storage, etc. Compared to pumped storage, new energy storage generally has advantages such as short construction period, flexible site selection, fast response, and strong regulation ability, which can provide more time scale regulation capabilities for the power system.
The output of renewable energy sources such as wind and solar power fluctuates greatly and is accompanied by uncertainty.
From the perspective of the daily output of wind and solar power and the peak and valley load of the power grid, wind power generally has low daytime output and high nighttime output, while photovoltaic power generation has high noon output and no output at night. The daily electricity load presents two peaks in the morning and evening. During the peak period of wind and solar power output, the net load peak significantly decreases, and the net load presents a significant "duck curve" feature, with a significant increase in load volatility.
From the perspective of seasonal wind and solar power output and grid load peaks and valleys, the peak wind power output is in spring and autumn, while the peak photovoltaic power generation is in summer and autumn (daytime). In winter and summer, especially at night, the load electricity is high while the renewable energy generation is low. The grid load has a clear characteristic of "winter and summer" double peaks, making it difficult to match the seasonality of renewable energy generation.
And from renewable energy output and grid load
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