Domas trolley case energy storage power supply

Can a stationary supercapacitor save energy in a trolleybus traction network?

The aim is to determine potential energy savings in the power supply system of the trolleybus traction network. The use of a stationary supercapacitor energy storage device and the reconfiguration of the power system was compared.

Why is installation of energy storage system easier in new trolleybuses?

Installation of energy storage system is easier into new trolleybuses in terms of technical challenges, because the proportion of the energy storage system can be already considered at trolleybus design and manufacture.

Can 21 tr trolleybus return braking energy back into trolley?

Recommendation for 21 Tr trolleybuses: 21 Tr trolleybuses were able to return braking energy back into trolley but this features was disabled due to poor reliability (thyristor failures). Solving reliability issue would be more beneficial instead of installation of electric energy storage system for utilization of braking energy.

How much energy does a trolleybus use?

In the study and in other documents concerning the TROLLEY project, information about average energy consumption of 2.5 kWh/km can be found. Note: Our study comes to the number of 1.3 kWh/km. This result was obtained from a measurement on a smaller and lighter trolleybus 21 Tr, see Chap. 4.2.4, equation (4.8).

What is the DPMB trolleybus supply network?

The DPMB trolleybus trolley supply network is divided into several separately supplied sections. The feeder lines for individual sections have different lengths and further there are often situations like doubled lines etc.

How to eliminate voltage oscillations in trolleybus propulsion system?

In order to eradicate voltage oscillations in the power supply system, the power of the trolleybus propulsion systems isreduced when there occurs an excessive voltage drop in the power system. It involves power reduction which is proportional to the value of voltage drop.