基于分层控制策略的牵引供电系统谐波阻抗测试装置

doi:10.19595/j.cnki.1000-6753.tces.170554

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摘要提出一种单相级联H桥结构的牵引供电系统谐波阻抗测试装置,采用干预式法向牵引网中注入频率和幅值可控的谐波电流以测量谐波阻抗。建立了测试装置与牵引供电系统之间的功率潮流关系,分析了其工作原理。控制系统采用分层控制策略：顶层功率控制用于从牵引供电系统中吸收有功平衡自身损耗;二层谐波控制用于产生谐波电流;三层均压控制用于均衡各H桥变流器电容电压。对控制策略进行了理论分析和仿真研究,最后在小功率实验平台上进行实验验证,结果表明应用该测试装置能够准确测量系统谐波阻抗。

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	刘秋降
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关键词 ：高次谐振, 牵引供电系统, 谐波阻抗, 级联H桥, 分层控制

Abstract：This paper proposes a harmonic impedance measuring apparatus based on single phase cascaded H-bridge converters. The apparatus adopts the hierarchical control strategy to inject harmonic currents into traction power supply systems (TPSSs) with controllable frequencies and amplitudes. Power flow relationship between TPSSs and the apparatus is established. Working principle of the apparatus is clarified. The proposed control strategy is composed of three levels. The top power control level is employed to absorb active power and compensate the loss of this apparatus. The second harmonic control level is utilized to generate harmonic currents. The third voltage balancing control level is applied to balance the capacitor voltage of H-bridge converters. Theoretical analysis and simulations about the performance of this apparatus are carried out. Experiment results in laboratory scale confirmed that the apparatus can measure system harmonic impedance precisely.

Key words： High-order resonance traction power supply system harmonic impedance cascaded H-bridge hierarchical control

收稿日期: 2017-05-05 出版日期: 2018-07-12

PACS:

TM92

基金资助:国家重点研发计划先进轨道交通重点专项资金（2017YFB1200802）和中央高校基本科研业务费专项资金（2018JBZ10）资助项目

通讯作者: 吴命利男,1971年生,教授,博士生导师,研究方向为电气化铁道供电及城市轨道交通供电、电力系统仿真、电能质量检测、评估与治理等。E-mail：mlwu@bjtu.edu.cn

作者简介: 刘秋降男,1989年生,博士研究生,研究方向为电气化铁道供电。E-mail：liuqiujiang@bjtu.edu.cn

引用本文:

刘秋降, 吴命利, 张俊骐, 吴丽然, 李静. 基于分层控制策略的牵引供电系统谐波阻抗测试装置[J]. 电工技术学报, 2018, 33(13): 3098-3108. Liu Qiujiang, Wu Mingli, Zhang Junqi, Wu Liran, Li Jing. Harmonic Impedance Measuring Apparatus of Traction Power Supply System Based on Hierarchical Control Strategy. Transactions of China Electrotechnical Society, 2018, 33(13): 3098-3108.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.170554 https://dgjsxb.ces-transaction.com/CN/Y2018/V33/I13/3098

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