| Abstract |
Pulse converters, also known as four-quadrant converters, have the capability of transmitting power bidirectionally and achieving near unity power factor with a nearly sinusoidal input current waveform. They are ideal front end power conversion devices for inverter fed traction drive systems. This paper presents the implementation of the control schemes for the SPPC system, namely the voltage vector control (VVC) scheme and the direct current control (DCC) scheme. In order to provide a realistic load for the SPPC system, a VSI fed IM drive system is included in a full scale traction drive system simulator. System transient analysis methods are generalized and outlined. Transient tests under various system disturbances are carried out comparatively for the two schemes in order to compare the relative performance. It can be concluded from the study that, from the control viewpoint, the DCC scheme presents some advantages over the VVC scheme. |
