Mobile phones are a tranquilizer for modern urbanites. You can stay motionless with your mobile phone in hand. However, if the phone battery is low, anxiety and anxiety will be stirred immediately. Of course, as long as there is a power bank, the sense of security will be instantly full.
Have you ever thought that the city we live in also needs a "giant power bank". It charges in the dead of night and discharges at critical moments, making the urban power grid safer and more stable.
No, the city’s "giant power bank" in Changxing, Huzhou, the 10-kilovolt Pheasant City Energy Storage Power Station has entered the countdown to start production.
At present, the Jicheng Energy Storage Power Station is undergoing commissioning before grid connection. After it is put into operation, it will become the country's first grid-side lead storage power station.
The "first in the country" sounds great, but what is the "lead storage type" and which side is the grid side?
One of the core equipment of an energy storage power station is the battery. There are mainly lead-acid batteries, alkaline batteries, lithium-ion batteries, flow batteries and sodium-sulfur batteries. At present, large-scale energy storage mainly uses lead batteries, all-vanadium flow batteries and lithium iron phosphate batteries.
"Lead storage type" refers to the use of lead storage batteries in this energy storage power station.
why? All vanadium flow batteries and lithium iron phosphate batteries expressed dissatisfaction.
It turns out that the all-vanadium redox flow battery has low energy density and large floor space; the lithium iron phosphate battery has superior performance, but its own safety and stability issues need to be further improved, and the fire protection is limited. After comprehensively comparing the characteristics of the three mainstream battery technologies in terms of safety, economy, and environmental protection, lead-acid batteries are more suitable. In fact, lead-acid batteries are not unfamiliar to us, and most electric bicycles use it.
Let's talk about the grid side.
As a commodity, electricity, like other commodities, has its production, transmission and consumption processes. Corresponding to these three processes are the power generation side, the grid side and the user side.
As one of the important contents of the construction of a diversified and highly flexible grid, the construction of grid-side energy storage projects will help to dynamically balance power supply and demand and realize flexible interaction between source and grid loads and storage.
