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This paper studies the stability of a DC Micro-grid integrated in urban railway systems in order to recover trains braking energy.It is a green solution based on storing the excess of braking energy in a hybrid storage system and reusing it in non-railway applications such as auxiliary loads in a station or electric vehicles in proximity, which will increase the global energy efficiency.The risk of instability caused by constant power loads is detailed and solved using backstepping approach.It is shown that this problem can be solved by controlling the energy storage system.
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Nasr et al. (2015) studied this question.
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