Title :
Buddy bidirectional supply for traction substations
Author :
de Jager, W.A.G.
Author_Institution :
IMTECH HIGH VOLTAGE, Ridderkerk, Netherlands
fDate :
Aug. 30 2011-Sept. 1 2011
Abstract :
Most traction substations are equipped with 12-pulse passive rectifiers. Therefore, Total Harmonic Distortion (THD) of the input current is high, and feedback of braking power into the grid is not possible. Also, the overhead line voltage fluctuates seriously with varying loads. Imtech has developed a bidirectional supply for traction substations based on IGBT technology. The power electronics consist of a hysteresis controlled line-side converter. This results in low THD in the input AC current and low ripple on the output DC voltage. A system concept is developed for existing substations to add such an active converter to the already installed 12-pulse passive rectifier. In feed-in operation the system operates as a regular 12-pulse passive rectifier. In case of a reverse power flow due to braking operation on the track, the converter is activated, thus making feedback mode possible.
Keywords :
braking; harmonic distortion; hysteresis; insulated gate bipolar transistors; load flow; power convertors; power grids; power overhead lines; rectifier substations; traction; IGBT technology; THD; bidirectional supply; braking power feedback; hysteresis controlled line-side converter; input AC current; output DC voltage; overhead line voltage fluctuation; power electronics; power grid; reverse power flow; total harmonic distortion; traction substation; twelve-pulse passive rectifier; Harmonic analysis; Load modeling; Mathematical model; Rectifiers; Substations; Vehicles; Voltage control; Active Front-End; Converter control; DC power supply; Diode; Harmonics; IGBT; Modelling; Power factor correction; Rail vehicle; Regenerative power; Simulation; Three-phase system; Traction application; Transformer;
Conference_Titel :
Power Electronics and Applications (EPE 2011), Proceedings of the 2011-14th European Conference on
Conference_Location :
Birmingham
Print_ISBN :
978-1-61284-167-0
Electronic_ISBN :
978-90-75815-15-3
