高压直流输电线路极间耦合影响及故障选极方案

发布时间：2018-03-11 22:02

本文选题：高压直流输电　切入点：线路　出处：《电力自动化设备》2017年04期 　论文类型：期刊论文

【摘要】：为了解决高压直流输电线路极间耦合引起的问题,提出了一种利用单极电气量的故障选极方案。耦合特性分析发现线路极间耦合程度与电气量的频率有关,且频率越高则耦合作用越显著。故障电气量频谱特性理论分析及仿真结果表明健全极电气量中低频信号含量远低于故障极。基于健全极与故障极低频信号差异,提出了仅利用单极电气量的故障极选择方法,并给出了故障选极判据。仿真结果及现场录波数据均验证了所提选极方法的可行性及有效性。
[Abstract]:In order to solve the problem caused by the coupling between poles of HVDC transmission lines, a fault pole selection scheme using unipolar electrical quantities is proposed. The coupling characteristics analysis shows that the coupling degree between the poles of the lines is related to the frequency of the electrical quantities. And the higher the frequency, the more significant the coupling effect is. The theoretical analysis and simulation results show that the low frequency signal content of the sound pole electric quantity is much lower than that of the fault pole. Based on the difference between the perfect pole and the fault extreme low frequency signal, A fault pole selection method using only unipolar electrical quantities is proposed and the criterion of fault pole selection is given. The simulation results and field recording data verify the feasibility and effectiveness of the proposed method.
【作者单位】：西安交通大学电气工程学院;中国电力科学研究院;
【基金】：国家自然科学基金资助项目(51477131) 国家电网公司科技项目(XT71-15-049,SGSNKYOOKJJS1501564)~~
【分类号】：TM75

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