Analysis of Effect of Train Overload on Energy Consumption of AALRT
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Date
2016-06
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Addis Ababa University
Abstract
especially for the traction in its daily operation. To implement energy saving programs and to study
economical operation strategies, an energy estimated model is required. The models can be further
extended to develop models and simulation for estimating power demand of train operation and
minimizing energy consumption through different driving strategies.
In order to make analysis for train energy consumption and regenerative energy, this thesis work
focuses only Ayat to Torhiloch (East Wast) line of Addis Ababa Light Rail transit (AALRT).
The main targets of this research work is to analyze the effects of train overloading in energy
consumption of AALRT by comparing with different load conditions such as normal and
maximum load. During peak hour the number of passengers are high, overloading affects energy
consumption because it takes more energy to accelerate the train.
Mathematical modeling and simulation based analysis are presented to analyze the effects of
overloading on train energy consumption. The models are formulated using train dynamics, train
tractive effort and driving resistance which includes aerodynamic, gradient and rolling resistance.
The methodology to evaluate energy consumption is based on power and time.
In this research work Matlab/Simulink software is developed to analyze train energy consumption
and regenerative energy. The method that used to create the simulation of energy analysis at
different track position such as level, uphill and downhill position.
Finally, the Simulink result shows that, there is 11.05 % additional energy consumption is used
during overloading when it is compared to normal train loading, 6.22 % used when it is compared
to maximum train loading condition. The result shows that during overloading the train needs high
amount of energy consumption to accelerate.
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Keywords
Train energy consumption, Regenerative energy, Mathlab/Simulink simulation