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A Dual-Loop Control Strategy of Railway Static Power Regulator Under V/V Electric Traction System

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6 Author(s)
An Luo ; Coll. of Electr. & Inf. Eng., Hunan Univ., Changsha, China ; Fujun Ma ; Chuanping Wu ; Shi Qi Ding
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For power quality in V/V traction system of the 350-km/h high-speed railway, a kind of railway static power conditioner (RPC) is discussed, which is used to carry out the comprehensive compensation of negative sequence and harmonic currents in the traction substation. In order to improve the control effect and performance of RPC, a dual-loop control strategy is constructed for RPC. Taking into account the disturbance and variation of electrified railway environment, a recursive proportional-integral control based on fuzzy algorithm is adopted to realize a fast and smooth tracking to the reference current. An energy-balance control is proposed to suppress the fluctuation of dc-link voltage and maintain the stability of RPC, which is an accurate and adaptive feedback control based on corresponding parameters. Finally, the correctness of the analysis proposed in this paper has been confirmed by the simulation and experiment results.

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Power Electronics, IEEE Transactions on  (Volume:26 ,  Issue: 7 )