| 引用本文: | 夏经德,张向聪,黄新波,康小宁,邵文权,刘毅力.基于纵向阻抗的双端量故障测距新算法[J].电力自动化设备,2015,35(10): |
| XIA Jingde,ZHANG Xiangcong,HUANG Xinbo,KANG Xiaoning,SHAO Wenquan,LIU Yili.Fault locating based on longitudinal impedance according to dual-terminal variables[J].Electric Power Automation Equipment,2015,35(10): |
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| 摘要: |
| 针对高压输电线路解耦后的?装型等值电路，以纵向阻抗为基础，提出了一种利用双端量进行故障测距的新算法。该算法能够在线计算出系统阻抗和线路参数，并根据在忽略线路分布电容影响的集中参数线路模型中故障距离的计算值对计算后的线路参数进行修正，克服了传统故障测距算法线路参数和系统阻抗在运行过程中的不确定性问题，也提高了测距精度。该算法原理简单，适用于长线路，也不受故障类型、故障电阻和故障距离的影响。仿真验证结果表明，该算法的平均测距误差小于0.3 %，能够满足工程上的要求。 |
| 关键词: 双端量 等值电路 解耦 纵向阻抗 故障测距 误差 |
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| 基金项目:国家自然科学基金资助项目（51037005，５０８７７０６１，51177127）；西安工程大学博士科研启动基金资助项目（BS1206）；西安市科学技术局技术转移促进工程项目（CX12185⑤）；陕西省重点科技创新团队计划资助项目（2014KCT-16） |
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| Fault locating based on longitudinal impedance according to dual-terminal variables |
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XIA Jingde1,2, ZHANG Xiangcong1, HUANG Xinbo1, KANG Xiaoning2, SHAO Wenquan1,2, LIU Yili1
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1.School of Electronics and Information，Xi’an Polytechnic University，Xi’an 710048，China;2.School of Electrical Engineering，Xi’an Jiaotong University，Xi’an 710049，China
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| Abstract: |
| A method of fault locating based on longitudinal impedance according to the dual-terminal electrical variables is proposed for the π- type equivalent circuit of decoupled high-voltage transmission line. The line parameters and system impedance are online calculated and modified according to the fault distance calculated by the circuit model with centralized line parameters and neglected distributed capacitance，which avoids the uncertainty of line parameters and system impedance of traditional fault locating algorithms to improve the locating precision. The proposed method is suitable for the long line and immune to the fault type，fault resistor and fault location. Simulative results show its average locating error is less than 0.3 %，meeting the engineering requirements. |
| Key words: dual-terminal variables equivalent circuit decoupling longitudinal impedance electric fault location errors |
