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| 基于暂态零模电流近似熵的小电流接地故障定位新方法 | |
| 引用本文： | 孙波,徐丙垠,孙同景,薛永端,刘世光.基于暂态零模电流近似熵的小电流接地故障定位新方法[J].电力系统自动化,2009,33(20):83-87. |
| 作者姓名： | 孙波 徐丙垠 孙同景 薛永端 刘世光 |
| 作者单位： | 1. 山东大学控制科学与工程学院,山东省济南市,250061 2. 山东科汇电力自动化有限公司,山东省淄博市,255087 3. 山东省昌邑市电力公司,山东省昌邑市,261300 |
| 基金项目： | 山东省自然科学基金，山东省电力公司科技项目 |
| 摘 要： | 提出一种通过计算暂态零模电流近似熵确定小电流接地故障区段的新方法.该方法以故障点两侧暂态零模电流波形差异较大为基础,分别求取沿线各检测点暂态零模电流的近似熵.健全区段两端暂态零模电流近似熵基本相同,其近似熵之比接近1;故障区段两端暂态零模电流近似熵差异大,其近似熵之比(数值小的与数值大的之比)最小,利用此特征可以确定故障区段.该方法数据传输量小,各检测点不需要精确时间同步.最后通过仿真和现场试验验证了该方法的正确性. |
| 关 键 词： | 小电流接地故障 故障定位 暂态零模电流 近似熵 |
| 收稿时间： | 2009/2/23 0:00:00 |
| 修稿时间： | 2009/10/10 0:00:00 |
New Fault Locating Method Based on Approximate Entropy of Transient Zero-module Current in Non-solidly Earthed Network |
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| SUN Bo,XU Bingyin,SUN Tongjing,XUE Yongduan,LIU Shiguang.New Fault Locating Method Based on Approximate Entropy of Transient Zero-module Current in Non-solidly Earthed Network[J].Automation of Electric Power Systems,2009,33(20):83-87. | |
| Authors: | SUN Bo XU Bingyin SUN Tongjing XUE Yongduan LIU Shiguang |
| Affiliation: | SUN Bo1,XU Bingyin2,SUN Tongjing1,XUE Yongduan2,LIU Shiguang3(1.Sh,ong University,Jinan 250061,China,2.Sh,ong Kehui Electric Co.Ltd.,Zibo 255087,3.Changyi Power Supply Company,Changyi 261300,China) |
| Abstract: | A new method based on calculating approximate entropy of transient zero-module current is presented in order to locate the single phase grounding fault in non-solidly earthed network.The approximate entropies of transient zero module current at both ends of healthy section are approximately equal each other,so the ratio is close to one.On the contrary,the approximate entropies at both ends of fault section are different,and the ratio is less than that of healthy section.According to this characteristic,the ... |
| Keywords: | non-solidly earthed fault fault locating transient zero-module current approximate entropy |
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