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- Title
一种模块化级联H 桥构造的三相-单相同相 牵引供电系统.
- Authors
黄小红; 李群湛; 舒泽亮
- Abstract
In order to solve the power quality problems such as negative sequence,harmonic and reactive power for high-speed and heavy-loading railway,on the basis of 3-phase symmetrical compensation and H-bridge,a co-phase traction power supply structure of 3-phase to single-phase is presented by combining the modular multilevel cascaded H Bridge compensator(MMCHC)with the universal 3-phase transformer. The compensative principles and characteristic were analyzed respectively. The topology of MMCHC by delta arms connection was proposed,the sub-module parameters were designed,and the control strategy was also given subsequently. The 3-phase traction transformer is converted into single-phase power supply by the direct-connected compensation device,then the saved capacity of deleting matched transformers is 2 times of the compensation capacity. Simulations show that the compensation characteristics and dynamic performance is prominent for the compensator in traction and regenerative braking operation condition. Negative sequence,harmonic and reactive power can be eliminated,and the sub-module capacitor voltage is stabilized within 2%
- Publication
Electric Machines & Control / Dianji Yu Kongzhi Xuebao, 2017, Vol 21, Issue 10, p8
- ISSN
1007-449X
- Publication type
Article
- DOI
10.15938 /j.emc.2017.10.002