Digest of "Estimation of Traction Drive Test Bench with Energy Storage System Operation in Regenerative Braking Mode"

Abstract

The paper presents configuration of the traction drive test bench with energy storage system, calculation of the scale factors, estimation of the energy storage system size and Matlab simulation results of the bench operation in a braking mode at different levels of the supercapacitor initial voltage. Correct operation of the test bench depends on the correct scaling therefore within this article scale factors are calculated, and operational range of supercapacitor voltage is set. Scaling of the energy storage system allows choosing optimum parameters for the supercapacitor to provide effective braking energy saving at minimum price and sizes. According to the scale, the operational voltage range of the supercapacitor used in the experiments is calculated. In the case when value of the supercapacitor initial voltage is in the operational range limits, the energy storage system allows the braking energy saving and partial providing the traction motor with energy in the acceleration mode. It is necessary to consider possible decrease in ESS effectiveness if initial voltage of the supercapacitor is too close to the operational range limits. The power of braking resistor should be higher than 3 kW for all braking energy dissipation in the case when regenerative braking energy saving by ESS is impossible.