| 引用本文: | 陈豪威,王媛媛,唐夏菲,等.基于S变换暂态能量与方向的无整定配电网选线新方法[J].电力系统保护与控制,2018,46(14):71-78. |
| CHEN Haowei,WANG Yuanyuan,TANG Xiafei,et al.A new fault line selection method for distribution network system based on transient energy and direction of S-transformation[J].Power System Protection and Control,2018,46(14):71-78 |
|
| 本文已被：浏览 5205次 下载 2169次 |
码上扫一扫！ |
|
|
| 基于S变换暂态能量与方向的无整定配电网选线新方法 |
|
陈豪威1,2,王媛媛1,唐夏菲1,殷 惠1,林 成1,黄路明1
|
|
(1.湖南省电动交通与智能配网工程技术研究中心(长沙理工大学), 湖南 长沙 410114; 2.国网湖北省电力有限公司检修公司鄂东运维分部, 湖北 武汉 430000)
|
|
| 摘要: |
| 为了提高配电网单相接地故障时选线的准确性和可靠性，提出了一种基于S变换暂态能量与方向的无整定配电网选线新方法。通过S变换计算各条线路故障特征频率下的暂态能量参数与综合相角参数，利用欧氏距离算法融合二维信息得到每条线路的特征距离，比较实时特征样本的故障距离和健全距离大小实现基于无整定保护判别的配电网故障选线。仿真结果表明，该方法受故障位置、故障合闸角、故障电阻、网络结构等因素影响较小，且判据裕度较高。该方法相比单一判据方法更加适用于结构复杂的配电网系统，同时不必人为规定继电器的动作特性，即无需人为设定判别整定值，具有很高的选线准确性和鲁棒性。 |
| 关键词: S变换 暂态能量参数 综合相角参数 特征距离 无整定 |
| DOI：10.7667/PSPC171058 |
| 分类号: |
| 基金项目:国家自然科学基金资助(51777014);湖南省自然科学基金资助(2016JJ2004) |
|
| A new fault line selection method for distribution network system based on transient energy and direction of S-transformation |
|
CHEN Haowei1,2,WANG Yuanyuan1,TANG Xiafei1,YIN Hui1,LIN Cheng1,HUANG Luming1
|
|
(1. Hunan Provincial Engineering Research Center of Electric Transportation and Smart Distributed Network, Changsha University of Science and Technology, Changsha 410114, China;2.The Eastern Operation and Maintenance Division, Maintenance Company, State Grid Hubei Electric Power Company, Wuhan 430000, China)
|
| Abstract: |
| In order to improve the accuracy and reliability of faulty line selection when single phase grounding fault occurs in distribution systems, this paper presents a new non-setting fault line selection method for distribution systems based on transient energy and direction of S transform. The transient energy parameters and the integrated phase angle parameters are calculated at a characteristic frequency of each line by S transform, the Euclidean metric algorithm is used to get the characteristic distance of each line by fusing two-dimensional information, the robust distance and the fault distance of the real-time samples are compared, thereby realizing the fault line selection based on the method of non setting protection. According to simulation result, this method is affected little by fault location, fault initial phase angle, ground resistance network structure and other factors, and the criterion margin is higher. Comparing with single criterion method, it is more suitable for complex distribution network system. At the same time, it does not need to specify the operating characteristics of relays, which means there is no need to set discriminant settings and has high accuracy and robustness in fault line selection. This work is supported by National Natural Science Foundation of China (No. 51777014). |
| Key words: S-transform transient energy parameters integrated phase angle parameters characteristic distance non setting |
