Metro power supply capacitor energy storage

Can stationary super-capacitors store regenerative braking energy?

In this paper, the stationary super-capacitors are used to store a metro network regenerative braking energy. In order to estimate the required energy storage systems (ESSs), line 3 of Tehran metro network is modeled through a novel approach, in peak and off-peak conditions based on the real data obtained from Tehran metro office.

Why are super-capacitors used in transport systems?

Today, super-capacitors are used in the transport systems as a mean to store energy and reuse it during short periodic intervals , , , , , . In a metro network system, the trains are accelerated and braked frequently.

How much energy can a super-capacitor store?

At this point, 75% of the super-capacitor’s capacity can be used to store energy in braking times or restore it in accelerating times. Selecting a SOC lower than 0.25 leads to a voltage lower than 300 V which is not appropriate for power converter components as well as super-capacitors.

Do Metro Trains have supercapacitors?

Metro trains equipped onboard with supercapacitors: a control technique for energy saving International Symposium on Power Electronics Electrical Drives Automation and Motion (SPEEDAM) ( 2010), 10.1109/SPEEDAM.2010.5542102 Wei Wang, Ming Cheng, Ya.

What is the voltage waveform of super-capacitor bank of station 5?

Voltage waveform of super-capacitor bank of station 5 during off-peak period. To save the regenerative energy in each station, the series and parallel connection of super-capacitors is used, where the capacity of each cell is 3000 F and its voltage is 2.7 V.

Can stationary ESS save regenerative energy in a metro network?

In Refs. , , , , stationary ESS has been applied to save the regenerative energy in a metro network. Stationary ESS has been proposed for voltage regulation of weak points in Ref. . But, the driving cycle and characteristic of the studied metro system has not been throughly explained.