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Research on Control Strategy of Cophase Traction Power Supply System Device

Author: WeiGuang
Tutor: LiQunZhan
School: Southwest Jiaotong University
Course: Proceedings of the
Keywords: And noninverting traction power supply system Underlying converter control Mid-level compensation trend control Upper coordinated control Simulation Platform
CLC: U223
Type: Master's thesis
Year: 2009
Downloads: 233
Quote: 10
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Abstract


There are a lot of negative sequence harmonics , reactive power for electrified railway traction power supply system , as well as the adjacent power supply section split-phase insulation caused by the train speed and traction loss , YN, vd balance transformer and power flow control is organic combined , and constitutes a new type of in-phase traction power supply system . The system basically eliminated the three-phase imbalance , and harmonic content as much as possible well , from the fundamental solution to the principal contradiction of the railway sector and the power sector . Cancel the electric phase separation links the trend of the times , comply with the high-speed passenger cargo heavy . This paper first describes the structure of the in-phase power supply system , the balance transformer characteristics , analyzes the structure and balance of power flow controller transform principle , and gives the general framework of the control strategy . According to the hierarchical structure , respectively detail the underlying converter control strategy , and the trend of mid-level compensation control strategy , the upper coordinated control strategy , and the feasibility of the scheme is verified by simulation . Power quality compensation premise is to detect and decomposition of the locomotive load current , trend analysis of the same phase power supply system , solving the instruction to be compensation current . The trend of the mid-level compensation control module of the full compensation and satisfaction optimization to compensate for two types of programs , and to compare and analyze both steady-state and dynamic performance . When given the current instruction , it requires that the underlying converter control module controls the fast power electronic devices and the standard of the tracking instruction signal . This paper introduces a triangular wave modulation , multiple phase shift carrier SPWM technology , hysteresis current tracking control , the instantaneous value comparison control one cycle control five types of control strategies have their own advantages in terms of performance . In penetrating power supply mode , the traction through communication , rational allocation of capacity between the substation is powered locomotive load ; traction transformer and IPFC optimizing the configuration of a combination of active and standby topology control ; premise to meet the power quality parameters to optimize the IPFC investment in capacity , these are upper coordination responsibilities of the control strategy . In this paper, the control strategy of the corresponding functions , and adapt best engineering program sought from the comparison to the same phase traction power supply system simulation platform based on LabVIEW software to build , and laid the foundation for future theoretical analysis .

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CLC: > Transportation > Rail transport > Electrified railway > Power supply
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