| 引用本文: | 闫晗,舒泽亮,姚家煊,陈亚军,马俊扬,杜玉亮.基于三相-单相电力电子变压器的牵引供电系统负载不平衡、无功和谐波潮流分析[J].电力自动化设备,2019,39(11): |
| YAN Han,SHU Zeliang,YAO Jiaxuan,CHEN Yajun,MA Junyang,DU Yuliang.Power flow analysis of unbalance, reactive power and harmonics in traction power supply system based on three-phase to single-phase power electronic transformer[J].Electric Power Automation Equipment,2019,39(11): |
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| 摘要: |
| 将三相-单相电力电子变压器应用于贯通式同相供电系统，对比计算了传统变压器、电力电子变压器的单相侧和三相侧之间负载不平衡、无功和谐波的潮流关系。基于三电平电路研究了隔离DC-DC变换器和多模块级联整流器的控制方法：整流器采用有功无功解耦控制，实现了三相网侧单位功率因数运行；隔离DC-DC变换器采用双边三电平控制，减小了流过中频变压器电感电流有效值。仿真和实验结果验证了基于三相-单相电力电子变压器的贯通式同相供电系统可有效消除负载不平衡、无功和谐波对三相电网电能质量的不良影响，系统动静态性能良好。 |
| 关键词: 三相-单相电力电子变压器 贯通式同相供电系统 电能质量 潮流计算 |
| DOI：10.16081/j.epae.201909045 |
| 分类号:TM41;TM922.3 |
| 基金项目:中国铁道科学研究院集团有限公司科研项目(1851-ZH1603) |
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| Power flow analysis of unbalance, reactive power and harmonics in traction power supply system based on three-phase to single-phase power electronic transformer |
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YAN Han1, SHU Zeliang1, YAO Jiaxuan1, CHEN Yajun2, MA Junyang1, DU Yuliang3,4
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1.School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China;2.State Grid Suining Electric Power Supply Company, Chengdu 629000, China;3.The Locomotive and Car Research Institute, China Railway Sciences Corporation Limited, Beijing 100081, China;4.Beijing Zongheng Electro-mechanical Technology Co.,Ltd.,Beijing 100081, China
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| Abstract: |
| The three-phase to single-phase power electronic transformer is applied to the co-phase power supply system. The relationships of power flow in condition of unbalance, reactive power and harmonics between the single-phase side and three-phase side on traditional transformer and power electronic transfor-mer are calculated and compared. Based on three-level circuit, the control strategies of isolated DC-DC converter and multi-model cascaded rectifier are studied. The rectifier adopts the decoupling control of active and reactive power to realize the unity power factor operation of grid side, and the isolated DC-DC converter applies the dual three-level control strategy to reduce the RMS of inductance current flowing through the medium frequency transformer. Simulative and experimental results verify that the proposed co-phase power supply system can effectively eliminate the adverse effect produced by unbalanced load, reactive power and harmonics, having good dynamic and static performance. |
| Key words: three-phase to single-phase power electronic transformer co-phase power supply system power quality power flow calculation |
