Title :
A Novel Energy Management Strategy of Onboard Supercapacitor for Subway Applications With Permanent-Magnet Traction System
Author :
Wei Wang ; Ming Cheng ; Ya Wang ; Bangfu Zhang ; Ying Zhu ; Shichuan Ding ; Wei Chen
Author_Institution :
Sch. of Electr. Eng., Southeast Univ., Nanjing, China
Abstract :
This paper proposes a novel energy management strategy (EMS) of an onboard supercapacitor (SC) for subway applications with a permanent-magnet (PM) traction system. The studied subway train is modeled, and its control is developed, in which the flux-weakening operation is taken into account to minimize the copper loss. The proposed EMS tries to minimize the actual flux-weakening region. Compared with the conventional EMS, the proposed EMS is realized by increasing the dc bus voltage to minimize the demagnetizing d-axis current, hence copper loss, in the flux-weakening region instead of reducing the dc bus voltage drop during startup. An experimental platform using the hardware-in-the-loop (HIL) simulation method is developed, and experiments are carried out to verify the effectiveness of the proposed EMS.
Keywords :
demagnetisation; electric potential; energy management systems; losses; permanent magnets; railways; supercapacitors; traction power supplies; DC bus voltage drop reduction; EMS; HIL simulation method; copper loss minimization; d-axis current demagnetization; energy management strategy; flux weakening operation; flux weakening region; hardware-in-the-loop simulation method; onboard supercapacitor; permanent magnet traction system; subway applications; subway train; Copper; Energy management; Permanent magnet motors; Resistance; Resistors; Substations; Traction motors; Energy management strategy; Energy management strategy (EMS); Flux-wekening; Permanent; flux weakening; magnet traction system; permanent-magnet (PM) traction system; subway; supercapacitor; supercapacitor (SC);
Journal_Title :
Vehicular Technology, IEEE Transactions on
DOI :
10.1109/TVT.2013.2293707