Dynamic braking in electric trains and feasibility study of the use of linear controller method to increase returned energy and decrease frictional braking

Regenerative braking produces energy for railway transportation by converting kinetic energy into electric energy. In this paper we have proposed a new approach to improve the energy efficiency of railway transportation. In order to increase the total regenerative braking energy in a blended braking mode with both electric and mechanical braking forces, we have applied a linear controller by using a simulation in MATLAB software. To control the speed of three-phase electric motors, V/F control method have been used. Due to slow response time for this method of speed control, we used a closed-loop control method of linear regression. By using this method, between %40 and %50 of the primary energy can be returned to the system. The designed method is very attractive for applications in energy saving systems due to low lost and high efficiency

Keywords:

Regenerative braking , energy storage , V/F control method , supercapacitors , linear controller