Dowell Provides PCS for the First Commercial Flywheel Energy Storage Projects (500kW)

On Dec 16^th, Flywheel Energy Storage project for State Grid has been completed and successfully running for 500+ hours already. It is the first commercial flywheel energy storage project in China and Dowell as preferred PCS supplier participate in this project.

Dowell PCS for FES – on the right 

This flywheel energy storage project was equipped with 2 set of 250kW flywheels, and a set of Dowell PCS system at grid side. For such systems, the main necessities are High energy density and energy efficiency. By high frequency switching, high energy densities can be obtained. By reducing losses, High energy efficiency can be obtained. Dowell PCS is used in this project with one switch for voltage step down and allows the power to flow from the DC bus to FES, with the second switch is utilized for voltage-boost allowing the power to flow from FES to DC bus.

Flywheel for FES

FES belongs to physical energy storage with obvious advantages: high energy storage density, high efficiency, low maintenance cost, long service life, large capacity, very quick to set in motion and convert stored energy. It is obviously that this application has strict requirement on PCS.

Transportation of FES

Being one of the top 3 PCS suppliers in China, Dowell PCS can cover 100kW to MW energy storage demands with the following features:

 

• Highly adaptable and reliable industrial modular design
• Flexible and configurable, suitable for a variety of technical requirements
• Multiple machines are connected in parallel to meet the requirements of different power levels
• Black start capability for microgrid applications
• Easy-to-operate design to ensure the safety of personnel and systems
• Long service life, improve life cycle revenue
• Small output harmonics and high efficiency
• Adapt to a variety of batteries, realize different charging and discharging strategies for different batteries

 

So far, Dowell’s PCS applied for 50+ projects for energy storage station on 10+ application around 100MW level. 

If you have demands for PCS and want to learn more, please refer to: Dowell iStore PCS

 

 

Keywords: PCS, flywheel, flywheel energy storage, FES, FESS, Dowell