基于暂态特征突变量的配电网故障选线方法研究
The Research of a Method to Select Fault Line for Power Distribution Networks Based on Transient Quantity Mutation

作者: 赵 磊 , 宋吉江 :山东理工大学电气与电子工程学院,山东 淄博;

关键词: 小电流接地系统小波包分解暂态零序能量Wavelet Electric Current Grounding System Wavelet Packet Decomposition Transient Zero-Sequence Energy

摘要:
本文对于配电网络常见的单相接地故障,提出了一种基于暂态特征突变量的综合选线方法。首先,对故障后各线路的暂态零序电流进行小波分解;然后,由小波分解系数求得低频能量占总能量的百分比来区分为强故障或弱故障;最后,在强故障情况下采用小波包系数极性法,在弱故障情况下采用暂态零序能量法来选择故障线路。通过MATLAB进行了大量的仿真验证,结果表明该方法具有很好的选线能力,即使发生母线故障、相电压过零故障,高阻接地故障时也能正确选线。

Abstract: For the single-phase grounding fault in the power distribution, a method to select fault line was proposed in the paper. Firstly, wavelet decomposition was used to transient zero-sequence current of each line after fault; then, the percentage of the low frequency energy to the total energy, which were calculated by the wavelet coefficients, was used to distinguish strong or weak fault; finally, the fault line was selected by comparing the polarities of the wavelet packet decomposition coefficient in the strong fault situation, but comparing the transient zero-sequence energy in the weak fault situation. The MATLAB simulation results show that the method is proposed has good ability to carry out the fault line. The criterion can keep the high reliability when the circuit is bus-bar, high resistance or voltage zero grounding.

文章引用: 赵 磊 , 宋吉江 (2015) 基于暂态特征突变量的配电网故障选线方法研究。 电力与能源进展, 3, 158-165. doi: 10.12677/AEPE.2015.35022

参考文献

[1] 贺家李, 李永丽, 董新洲, 等 (2010) 电力系统继电保护原理. 第四版, 中国电力出版社, 北京.

[2] 曾祥君, 尹项根, 张哲, 等 (2001) 配电网接地故障负序电流分布及接地保护原理研究. 中国电机工程学报, 21, 84-88.

[3] 唐轶, 陈奎, 陈庆, 等 (2005) 导纳互差之绝对值和的极大值法小电流接地选线研究. 中国电机工程学报, 25, 49-54.

[4] 要焕年, 曹月梅 (2000) 电力系统谐振接地. 中国电力出版社, 北京.

[5] 薛永端, 冯祖仁, 徐丙垠, 等 (2003) 基于暂态零序电流比较的小电流接地选线研究. 电力系统自动化, 27, 48-53.

[6] 张帆, 潘贞存, 张慧芬, 等 (2006) 基于零序电流暂态极大值得小电流接地选线新判据. 电力系统自动化, 30, 45-48.

[7] 贾清泉, 窦春霞, 张华, 等 (2007) 配电网单相故障多频带奇异最选线方法. 电力系统自动化, 31, 74-77.

[8] 贾清泉 (2007) 非有效接地电网选线保护技术. 国防工业出版社, 北京.

[9] 潘露, 吕艳萍, 于芳, 等 (2007) 基于相频特性与多频待分析的小电流接地系统故障选线. 电力系统自动化, 31, 76-84.

[10] 徐靖东, 张保会, 尤敏, 等 (2009) 基于暂态零序电流特征的小电流接地选线装置. 电力系统自动化设备, 29, 101-105.

[11] 陈凯, 肖遥, 慕娇娇, 等 (2013) 改进暂态特征突变量的小电流接地系统选线仿真研究. 电气开关, 5, 24-28.

[12] 田书, 何金朋, 聂赫 (2012) 基于暂态零序能量的配电网故障选线方法研究. 工矿自动化, 1, 51-54.

[13] 陈皓 (2007) 微机继电保护原理与算法仿真. 中国电力出版社, 北京.

分享
Top