Novel topology for correction of unbalanced load in single phase electric traction systems
2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289) - Tập 3 - Trang 1208-1212 vol.3
Tóm tắt
Railway traction loads present large single phase loads to the supply system. Typically zero sequence components are removed using a phase to phase transformer connection, however a large negative sequence component remains. As the amount of rail traffic increases and the use of regenerative braking becomes higher, the issue of negative sequence becomes more critical. This paper presents a novel active filter approach to negative sequence compensation using single phase compensators at the track side of the system. The compensators for two separate track sections share a common DC bus, which allows power transfer between the sections. A control algorithm based on synchronous reference frame theory is proposed, with modified transformations to reflect the two phase nature of the system. The topology and control algorithm are verified using simulation and results are shown.
Từ khóa
#Topology #Phase transformers #Active filters #Control systems #Rail transportation #Earth #Isolators #Isolation technology #Power system harmonics #Power harmonic filtersTài liệu tham khảo
10.1109/63.491643
gyugi, 1978, Principles and Applications of Static, Thyristor Controlled Shunt Compensators, IEEE Transactions on Power Apparatus and Systems, pas 97, 1935, 10.1109/TPAS.1978.354690
2001, Railway Static Feeding Power Conditioner for AC Electric Railway Power Supply Systems Group Power Supply Technology Development Division Railway Technical Research Institute
10.1109/63.261037
2002, Multi-SVC Installation for Traction Load Balancing in Central Queensland
10.1109/63.261037
10.1109/41.793345
10.1109/28.753620
10.1541/ieejias.121.43
10.1109/TIA.1985.349618