Electric energy monitoring for applying an energy storage systems in trolleybus DC traction
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Date
2017
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers Inc.
Abstract
This article deals with practical implementation of
modern energy monitoring system in Public Transport Company
of Ústí nad Labem (PTCUL) city in the Czech Republic. The
motivation for this project is based on the fact, that present
configuration of traction lines, old-fashioned trolleybuses and
traction substations do not allow for the effective use of recovered
energy. The fundamental issue lies in the transfer of recovered
energy back from the DC traction to the AC distribution
network. In many cases, this is not a technical problem on the
side of traction substation only, but the reverse flow of the
electrical energy can cause problems even in the distribution
network. The distributor of electrical energy lays down
restrictive conditions for allowing the reverse transfer of energy.
With the latest developments in the field of electrochemical
energy storage systems and particularly by continuously
declining their prices, a modern approach aims to use stationary
or mobile energy storage systems for saving non-utilized energy
from the DC railway and to re-use it for covering the
consumption peaks.
We have verified options for long range control of energy
flows between substations and trolleybuses. Based on the longterm on-site measurement and performed data analysis in our
dedicated software we have defined critical points for significant
energy savings. Now we can precisely define energy flow at the
AC input of substations, in the DC traction and in the
trolleybuses, themselves. Those analyses have been used as a
proposal for the fundamental design of trolleybus’ onboard
energy storage system.
Description
Subject(s)
Trolleybus transport, energy monitoring system, data analysis, optimization of electric energy consumption, energy storage system
Citation
ISSN
ISBN
978-1-5090-5582-1