| 引用本文: | 贾科,李论,宣振文,李猛,李晨曦.基于扰动注入的柔性直流配电网主动故障定位及其仿真研究[J].电力系统保护与控制,2019,47(4):99-106.[点击复制] |
| JIA Ke,LI Lun,XUAN Zhenwen,LI Meng,LI Chenxi.Study on fault location method and simulation for VSC-DC distribution network based ondisturbance injection[J].Power System Protection and Control,2019,47(4):99-106[点击复制] |
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| 摘要: |
| 直流配电网中电力电子元件耐受故障电流能力差，要求保护数毫秒切除故障，因此留给故障定位所使用的数据量有限。现有基于暂态电流单端量测的定位方法受分布式电容、噪声和过渡电阻影响较大，难以实现精确的故障定位。因此，考虑故障发生后直流断路器快速动作，在系统失电的情况下给系统串联一个LC注入装置构成衰减的振荡扰动，利用振荡频率、衰减系数与故障距离的关系，可以精确定位故障位置。仿真结果表明所提方法可行且具有一定的耐受过渡电阻、分布式电容、噪声和线路参数误差的能力。 |
| 关键词: 直流配电网 故障定位 LC注入装置 |
| DOI：10.7667/PSPC180223 |
| 投稿时间：2018-03-05修订日期：2018-05-30 |
| 基金项目:国家重点研发计划基金项目资助(2018YFB0904104); 国家自然科学基金项目资助(51725702，5177707151407067)国网浙江省电力有限公司科技项目资助(项目编号:5211JY16000U) |
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| Study on fault location method and simulation for VSC-DC distribution network based ondisturbance injection |
| JIA Ke,LI Lun,XUAN Zhenwen,LI Meng,LI Chenxi |
| (State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China) |
| Abstract: |
| The power electronic component in DC distribution network can’t withstand high current, which requires protection remove the fault in a few milliseconds, so the amount of data used for fault location is limited. The existing positioning method based on single ended transient current measurement can’t realize accurate fault position influenced by distributed capacitance, high fault resistance and noise. Considering that the fault has occurred, DC circuit breaker breaks off quickly, in the condition of loss of power system, it is connected in series with a LC injection device to form a decaying oscillation disturbance, and the fault location can be accurately located by using the relationship between the oscillation frequency, the attenuation coefficient and the fault distance. The simulation results show that the proposed method is feasible, with a certain ability to withstand fault resistance, distributed capacitance, noise and line parameter errors. This work is supported by National Key Research and Development Program of China (No. 2018YFB0904104), National Natural Science Foundation of China (No. 51725702 and No. 5177707151407067) and Science and Technology Project of State Grid Zhejiang Electric Power Co. Ltd. (No. 5211JY16000U). |
| Key words: DC distribution network fault location LC injection device |
