On February 28, my country's first megawatt-scale iron-chromium flow battery energy storage demonstration project was successfully put into trial operation in Inner Mongolia.
Does a city really need a giant "power bank" as standard?
Why are nearly 30 provinces across the country developing new energy storage industries at the same time?
Doing this well, what does it mean for the high-quality development of my country's energy?
"News 1+1" invited Li Jianwei, chief engineer of State Power Investment Corporation; Chen Haisheng, researcher of Institute of Engineering Thermophysics, Chinese Academy of Sciences, to jointly focus on: new energy storage construction, a new energy revolution?
The liquid flow battery energy storage demonstration project was successfully tested in Inner Mongolia
On February 28, my country's first megawatt-scale iron-chromium flow battery energy storage demonstration project was successfully put into trial operation in Inner Mongolia.
How do you view the energy storage principle?
What are the characteristics of this technical route?
How did the test run work?
How long will the trial run last? How will it be put into commercial use next?
Li Jianwei, Chief Engineer of State Power Investment Group Co., Ltd.:
We started the trial run at 10 o'clock on February 28, and the trial run will last for a total of 168 hours.
The purpose of the test run is to compare the design parameters with its actual operation.
If the comparison is reasonable and meets our expectations and requirements, we will switch to commercial operation after 168 hours, that is, after 7 complete days, and provide energy storage services for wind farms or wind-solar bases.
We hope to have electricity when there is wind, and electricity when there is no wind, and store the electricity when there is wind in the energy storage.
If the wind is strong and the electricity consumption is low, that is, when the supply exceeds the demand, it also needs to be stored. Otherwise, due to the special nature of electricity, when the power generation exceeds the electricity consumption, part of the wind energy must be discarded.
Therefore, we hope to provide energy storage services for the power generation end to help the electricity to be used more fully.
How will the people benefit from the development of the energy storage industry?
Li Jianwei, Chief Engineer of State Power Investment Group Co., Ltd.:
For users, everyone has the habit of using electricity, such as turning on the TV to watch programs at night; at the same time, industry also has its own characteristics, such as production during the day, so it will naturally form A peak and trough on the consumer side.
The resulting peak-to-valley difference brings a test to the power grid, as well as a test and requirement on the power generation capacity of the power supply side configuration.
If it can be equipped with energy storage, the peaks on the load side can be cut off, and the valleys can be filled up. We call it the transfer of energy, and it is also called peak cutting and valley filling.
If the curve tends to be flatter, without high peaks and low valleys, then for the power generation side, there is no need to build too many power generation installed capacity to meet the peaks.
Similarly, on the user side, due to the response to the smoothing requirements of the power grid and power generation side, we can also get a compensation for the peak-valley electricity price difference, that is, peak-peak electricity is expensive, and low-peak electricity is cheap. If Through energy storage, we can use more low-peak electricity and less peak-peak electricity.
New energy storage technology "multi-point flowering"
As of the end of 2022, among my country's new energy storage installed capacity, flow battery energy storage accounted for 1.6%, compressed air energy storage accounted for 2.0%, lead-acid (carbon) battery energy storage accounted for 1.7%, and other technical routes accounted for 0.2%. The dominant position is lithium-ion battery energy storage, which is 94.5%.
How is the construction of new energy storage systems across the country advancing?
How should we view and solve the challenges in the process?
How to accelerate the development of new energy storage technology? How does it relate to pumped water storage?
Chen Haisheng, a researcher at the Institute of Engineering Thermophysics, Chinese Academy of Sciences:
By the end of 2022, the cumulative installed capacity of China's operational energy storage projects will be 59.4GW.
Among them, pumped hydro storage accounts for about 77%; the cumulative scale of new energy storage market (including heat storage) is about 22%.
Pumped storage is the current mainstream technology, but it cannot fully meet our country's rapidly growing demand for energy storage.
On the one hand, pumped storage requires the construction of two reservoirs and dams, which are limited by some geographical conditions, so natural resources cannot meet our rapidly growing demand for energy storage.
On the other hand, in terms of performance, pumped storage is more suitable for long-term large-scale energy storage applications. In addition, energy storage also requires short-term and short-term high-frequency energy storage applications. New energy storage technologies need to be developed.
In addition to pumped storage in the future, what we call new energy storage will have good development prospects, and the installed capacity will also increase rapidly.
The two should be in a relationship of complementary advantages in terms of application. In general, the development of new energy storage may be faster, and the relative proportion will continue to increase.
(CCTV news client)