Environmental Engineering Reference
In-Depth Information
Figure 2.40 RESS pack on-board, Bombardier system
Top bearing
Steel tube
container
Carbon and
glass fibre
composite rotor
Electric utility
GRID
Meter
Stator
Third rail
or
catenary
Bottom bearing
Direct link in dc
Multi-
flyheel unit
configuration
Urban rail ac/dc substation
Figure 2.41 Trackside RESS using flywheels - Pentadyne system
Trackside energy storage has benefits of minimum capital expenditure, lower
operating costs, higher operating efficiency and less environmental impact due to
reduced transient loading on the catenary power supply.
For light rail the regenerative braking feature provided by ultra-capacitor
RESS gives significant cost savings, improved network reliability via third rail or
catenary voltage stabilization. The local transport system in several cities such as
