输电线路发生单相接地短路后采样周期对测距精度的影响
Influence of Sampling Period on the Accuracy of Single Phase to Ground Fault in Transmission Line

作者: 孟祥飞 * , 孙懿君 , 郝洪民 , 王 建 :山东理工大学电气与电子工程学院,山东 淄博;

关键词: 输电线路仿真建模故障测距实例分析Transmission Line Simulation Modeling Fault Location Case Study

摘要:
本文分析了输电线路三相系统发生单相接地短路故障时工频测距的基本原理。选用PSCAD/EMTDC仿真软件搭建输电线路分布参数模型,针对输电线路发生单相接地短路故障进行仿真,使用傅立叶算法对故障周期进行提取并计算电压电流工频量,利用基于工频分量的单端故障测距原理进行故障测距。分析利用傅立叶算法在提取电压电流工频量时选取不同采样周期对测距精度的影响。借助福建霞浦小沙110 KV大京风电线发生单相接地短路故障时,录波器采集到的实时故障数据,验证采样周期对测距结果的影响。对利用工频量进行故障测距时采样周期的选取有一定的借鉴意义。

Abstract: We analyze the basic principle of power frequency fault location of single-phase to ground fault in three-phase system of transmission line and use PSCAD/EMTDC simulation software to build the transmission line distributed parameter model. According to the transmission line single-phase grounding short circuit fault simulation, we use the Fourier algorithm to extract cycles of failure and calculate the voltage and current of power frequency to fault location, which is based on power frequency component of single end fault distance measurement principle. And current power frequency is analyzed by using the Fourier algorithm. Based on the real time fault data collected by the recorder in the single phase to ground fault in the small sand 110 KV large Xiapu Fujian wind line, the influence of the sampling period on the ranging results is verified. It can be used for referencing in the selection of sampling period when using power frequency to carry out fault lo-cation.

文章引用: 孟祥飞 , 孙懿君 , 郝洪民 , 王 建 (2016) 输电线路发生单相接地短路后采样周期对测距精度的影响。 智能电网, 6, 47-55. doi: 10.12677/SG.2016.62006

参考文献

[1] 贺家李, 葛耀中. 超高压输电线路故障分析与继电保护[M]. 北京: 科学出版社, 1987.

[2] 秦华锟. 高压输电线路故障测距算法综述[J]. 电力系统自动化, 2003, 27(6): 66-69.

[3] 李光琦. 电力系统暂态分析(第三版)[M].中国电力出版社, 2006: 3-4.

[4] 黄少锋, 曹凯, 罗澜. 一种消除过渡电阻影响的阻抗测量方法[J]. 电力系统自动化, 2013: 108-113.

[5] 吕艳萍. 一种消除过渡电阻对距离保护影响的新算法[J]. 电力与电工, 2009(9): 13-15.

[6] 仲崇权, 兰敬辉, 杨素英. 一种消除分布电容影响的电阻测量方法[J]. 大连理工大学学报, 2003(5): 372-376.

[7] 葛耀中. 新型继电保护和故障测距的原理与技术(第二版)[M]. 西安: 西安交通大学出版社, 2007: 256-257.

[8] 胡帆, 刘沛, 程时杰. 高压输电线路故障测距算法仿真研究[J]. 中国电机工程学报, 1995, 15(1): 67-72.

分享
Top