引用本文:周嘉阳,李凤婷,刘渊,等.基于直流电抗电压的柔性直流配电网故障测距方法[J].电力系统保护与控制,2018,46(19):95-101.
ZHOU Jiayang,LI Fengting,LIU Yuan,et al.A fault location method for flexible DC distribution network based on DC reactor voltage[J].Power System Protection and Control,2018,46(19):95-101
【打印本页】   【下载PDF全文】   【查看/发表评论】  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被：浏览 5142次   下载 2082次 本文二维码信息
码上扫一扫！
分享到： 微信 更多
字体:加大+|默认|缩小-
基于直流电抗电压的柔性直流配电网故障测距方法
周嘉阳1,李凤婷1,刘 渊2,辛超山3,达塔娜1
(1.新疆大学电气工程学院，新疆 乌鲁木齐 830047;2.国网新疆电力有限公司昌吉供电公司，新疆 昌吉 831100; 3.国网新疆电力有限公司经济技术研究院，新疆 乌鲁木齐 830047)
摘要:
故障测距是柔性直流配电网发展所需的关键技术之一，传统的高压直流输电系统故障测距方法在直流配电系统中适应性不好。因此在考虑线路配置直流电抗器的情况下，提出一种基于直流电抗电压的直流配电网双端故障测距方法。该方法从直流故障的电容放电阶段进行研究，利用线路两端直流电抗电压构建包含故障距离和过渡电阻的两个未知参数的时域微分方程，并利用最小二乘法进行求解。PSCAD仿真结果表明该方法能够有效地进行故障定位，并且能够计算出故障点过渡电阻，可以满足直流配电网的故障测距要求。
关键词:  直流配电网  故障测距  直流电抗电压  电容放电  R-L模型
DOI：10.7667/PSPC171396
分类号:
基金项目:新疆维吾尔自治区自然科学基金项目资助(2016D01C036)
A fault location method for flexible DC distribution network based on DC reactor voltage
ZHOU Jiayang1,LI Fengting1,LIU Yuan2,XIN Chaoshan3,DA Tana1
(1.College of Electrical Engineering, Xinjiang University, Urumqi 830047, China;2.Changji Power Supply Company, State Grid Xinjiang Electric Power Company, Urumqi 831100, China;3. Economics and Technology Research Institute, State Grid Xinjiang Electric Power Company, Urumqi 830047, China)
Abstract:
Fault location is one of the key technologies for the development of flexible DC distribution network. The fault location methods of conventional HVDC transmission line are not applicable to the DC distribution network. Considering the DC reactor installed on the line, a fault location method based on DC reactor voltage for DC distribution network is proposed. This method studies the capacitor discharging process of DC fault, and establishes the time domain differential equation based on the DC reactor voltages, which contains two unknown parameters of fault location and transition resistance, and solves the equation by least-squares method. Simulation results by PSCAD show that the proposed method can obtain the fault location and transition resistance accurately, and meet the requirement of DC distribution network fault location. This work is supported by Natural Science Foundation of Xinjiang Uygur Autonomous Region (No. 2016D01C036).
Key words:  DC distribution network  fault location  DC reactor voltage  capacitor discharging  R-L model
  • 1
X关闭
  • 1
X关闭