Abstract
An approach was proposed for determining rational parameters of the on-board capacitive energy storage for the underground railway rolling stock with recuperation systems. The essence of the approach is to determine the maximum power and energy intensity of the on-board CESS based on the analysis of the payback period of the storage systems. The main distinctive features of this approach include taking into account a number of operating conditions and technical features of the underground railway rolling stock.Using this approach, rational parameters of the on-board capacitive energy storage system for standard operating conditions of the experimental rolling stock with the recovery systems were determined at the Sviatoshyno ‒ Brovary line of the Kyiv Metropoliten. Based on the analysis of diagrams of the payback period of the chosen storage systems, it was established that for the given conditions of operation of the underground railway rolling stock, it is rational to introduce a capacitive storage with a maximum power of 1,000 kW and a working energy intensity of 3 kWh. It was calculated that for the given operating conditions, introduction of a storage system with rational parameters will save 16.1 % of the quantity of electric energy consumed for traction of the underground railway rolling stock.
Highlights
One of the key requirements to modernization of an existing or creation of a new rolling stock at present is the introduction of power-efficient and energy-saving systems [1]
The necessity and urgency of introduction of energy saving systems are dictated by the constant rise in the cost of energy resources over recent years
Over the last years, modernized and new rolling stock has been gradually put into operation by Ukrainian underground railways in order to reduce the cost of traction electric energy for trains
Summary
One of the key requirements to modernization of an existing or creation of a new rolling stock at present is the introduction of power-efficient and energy-saving systems [1]. Over the last years, modernized and new rolling stock has been gradually put into operation by Ukrainian underground railways in order to reduce the cost of traction electric energy for trains. Issues of determining rational parameters of capacitive energy storage systems (CESS) become of special relevance for the underground railway rolling stock (see block diagram of connection of the on-board CESS to the traction electric drive (Fig. 1, a) and the emergence of on-board CESS (Fig. 1, b). Block diagram of CESS connection to the traction electric drive (a) and appearance of the on-board CESS (b)
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