超高压输电线路直流融冰过程中接地故障定位技术

发布时间：2018-04-18 13:36

本文选题：直流融冰装置 + 融冰线路　；参考：《电力系统自动化》2017年20期

【摘要】：直流融冰技术是解决超高压输电线路覆冰问题的有效方法。由于融冰过程中冰水的掉落易导致输电线路的单相接地故障,研究了融冰线路的故障定位方法,以保障融冰过程的顺利进行及融冰设备的安全运行。首先对直流融冰系统的组成及整流器拓扑结构、控制策略进行了介绍并搭建了融冰系统的详细仿真模型。针对定电流控制方式下直流融冰线路的单相接地故障,通过对沿线电压分布的深入分析,提出了基于贝瑞隆模型的直流融冰线路接地故障定位方法。利用PSCAD/EMTDC仿真软件对融冰线路故障进行了仿真验证,结果表明该方法能够实现融冰线路接地故障的快速准确定位。
[Abstract]:DC ice-melting technology is an effective method to solve the icing problem of EHV transmission lines.In order to ensure the smooth progress of ice-melting process and the safe operation of ice-melting equipment, the fault location method of ice-melting line is studied because the drop of ice water easily leads to the single-phase grounding fault of transmission line.Firstly, the composition of DC ice-melting system, the topology of rectifier and the control strategy are introduced, and the detailed simulation model of the ice-melting system is built.In view of the single-phase grounding fault of DC ice-melting line under constant current control mode, a method of grounding fault location for DC ice-melting line based on Berelon model is proposed through the in-depth analysis of voltage distribution along the line.The PSCAD/EMTDC simulation software is used to verify the fault of ice-melting line. The results show that the method can locate the ground fault of ice-melting line quickly and accurately.
【作者单位】：智能电网教育部重点实验室(天津大学);天津大学电气自动化与信息工程学院;
【基金】：国家自然科学基金资助项目(51677125) 高等学校博士学科点专项科研基金新教师类资助项目(20120032120085)~~
【分类号】：TM752

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