Prerequisites of execution the experimental studies for definition of current state of using and accounting of the electrical rolling stock’s regenerative energy on sections of the “Pridniprovska” railway

This paper deals with the problems of enhancement of registration and distribution of electric energy which can be obtained from DC electric locomotives by the regenerative braking. According to theoretical researches, it is possible to return approximately 8 - 12% of electric energy which is consumed for electric traction by using of a regenerative braking mode. However in recent years for electric traction networks of JSC “Ukrainian Railways”, this index doesn’t exceed 2.6%. So we consider that the regenerative braking is one of the most prospective ways for energy saving in electric railway transport. Results of the experimental researches which were executed on DC traction substations and VL11M6 electric locomotives are described in this paper. Instantaneous values of voltage and current in different modes have been obtained. The electric energy balance for experimental zone has been performed. Also the ways of distribution and consumption of energy of regenerative braking mode have been analyzed. On this basis of the executed investigations, recommendations about providing of supercapacitor energy storage system for Ukrainian railways are proposed.

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Experimental investigation of actual situation of using and accounting of recovered energy of regenerative braking mode at the DC traction system

Bondar

Ustymenko

Kurylenko

et al. 2019

MATEC Web Conf.

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Fryze reactive power of trams in effective stochastic recuperation processes

et al. 2019

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Urban electric transport system, particularly tram systems, is not a direct current system not only in traction mode but in regenerative modes as both voltage on a collector and regenerative current are stochastic abruptly variable processes. The above- mentioned facts determine availability of Fryze’s reactive power in this system that flows from a railway substation to trams, leads to incidental losses of energy and significantly reduces its quality. So evaluation of power effectiveness of the system in electrical trams operation is impossible without determining the level of reactive power in this system. We have analytical expression of reactive power by Fryze. Numerical calculations for trams type T3D and T4D in regenerative braking modes are done. Probabilistic statistical data processing operation of reactive power expressions is done. It is determined that reactive power changes in the limit of 10…100 kilo-volt ampere reactive with mathematical expectation – 37,0 kilo-volt ampere reactive. Statistical allocation of random power values are different. Numerical calculations of incidental losses, energy of recuperation are done and they range supplementary – 20% from total losses. It is stated that coefficient of reactive power of system route of trams is exceeding permissible value 0,25.

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Prerequisites of execution the experimental studies for definition of current state of using and accounting of the electrical rolling stock’s regenerative energy on sections of the “Pridniprovska” railway

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Experimental investigation of actual situation of using and accounting of recovered energy of regenerative braking mode at the DC traction system

Experimental investigation of actual situation of using and accounting of recovered energy of regenerative braking mode at the DC traction system

Fryze reactive power of trams in effective stochastic recuperation processes

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