基于单相dq变换与改进PRONY算法的牵引网低频振荡检测方法

王晖; 吴命利; 李文锋; 王官宏; 李莹; 陶向宇

doi:10.3969/j.issn.0258-2724.2016.05.009

基于单相dq变换与改进PRONY算法的牵引网低频振荡检测方法

doi: 10.3969/j.issn.0258-2724.2016.05.009

王晖^1,2,
吴命利^2, ,,
李文锋¹,
王官宏¹,
李莹¹,
陶向宇¹

基金项目:

铁路总公司科研计划重点课题资助项目（2015J008-F）

详细信息

作者简介:
王晖(1985-),男,博士,研究方向为牵引网低频振荡机理及抑制、电力电子化电网超、次同步振荡机理及抑制,E-mail:09117353@bjtu.edu.cn

通讯作者:
吴命利(1971-),男,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,电磁暂态计算与电力系统数字仿真,电能质量测试、评估与治理,E-mail:mlwu@bjtu.edu.cn

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出版历程
- 收稿日期: 2014-11-04
- 刊出日期: 2016-10-25

Detection Method of Low-Frequency Oscillation in Traction Power Supply System Based on Single-Phase dq Transformation and Improved PRONY Algorithm

摘要

摘要: 牵引供电系统中的电气低频振荡现象会引发机车牵引变流器封锁，从而造成大面积发车延误。为解决这一问题，本文通过大量实测数据分析，给出了振荡时网压和网流的数学描述，并结合简单的车网电气模型简要阐明了网压低频振荡发生机制。根据牵引网单相供电的特点，提出使用网压信dq分解得到的d轴分量作为低频振荡的表征信号和检测对象，设计了以改进PRONY算法为基础的辨识低频振荡主导模式的检测方法。利用低频振荡案例中的实测数据对该检测方法进行验证，结果表明：本文设计的检测方法可以在1.4s内对频率小于30Hz、幅值大于0.01网压标幺值的低频振荡进行识别、计算出振荡主导模式并发出告警信号。
- 牵引网 /
- 低频振荡 /
- 单相dq变换 /
- 改进PRONY算法
Abstract: Electrical low-frequency oscillation in traction power supply systems causes vehicle traction system shutdown, which results in severe service delay. The mathematical descriptions of the oscillated voltage and current were presented based on the analysis of a large amount of measured data. The line voltage oscillation mechanism was also explained in a brief way through a simple electrical model representing the traction power supply system and locomotives. Considering the features of the single-phase power supply, the d-axis component of the line voltage was obtained by a single-phase dq transformation, and chosen as the characteristic signal and the detection object. Then, a detection method was designed based on the improved PRONY algorithm to identify the dominant pattern of low-frequency oscillation. The detection method was verified by the measured data from actual low-frequency oscillation cases. The results show that the designed detection method can identify the low-frequency oscillation with the frequency lower than 30Hz, magnitude over 0.01(p.u.), and calculate the dominant oscillation pattern and send out an alarm signal.
- traction power supply system /
- low-frequency oscillation /
- single-phase dq transformation /
- improved PRONY algorithm

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参考文献(17)

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文章访问数: 595
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基于单相dq变换与改进PRONY算法的牵引网低频振荡检测方法

doi: 10.3969/j.issn.0258-2724.2016.05.009

作者简介: 王晖(1985-),男,博士,研究方向为牵引网低频振荡机理及抑制、电力电子化电网超、次同步振荡机理及抑制,E-mail:09117353@bjtu.edu.cn

通讯作者: 吴命利(1971-),男,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,电磁暂态计算与电力系统数字仿真,电能质量测试、评估与治理,E-mail:mlwu@bjtu.edu.cn

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出版历程

Detection Method of Low-Frequency Oscillation in Traction Power Supply System Based on Single-Phase dq Transformation and Improved PRONY Algorithm

计量

出版历程

目录

作者简介:
王晖(1985-),男,博士,研究方向为牵引网低频振荡机理及抑制、电力电子化电网超、次同步振荡机理及抑制,E-mail:09117353@bjtu.edu.cn

通讯作者:
吴命利(1971-),男,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,电磁暂态计算与电力系统数字仿真,电能质量测试、评估与治理,E-mail:mlwu@bjtu.edu.cn