电力系统保护与控制Issue(4)：51-57,7.
小电流接地系统暂态电流频率特性分析及故障选线方法研究
Research on transient-current frequency analysis and faulty line detecting method in indirectly grounding power system
摘要
Abstract
High-frequency transient current component is used to select fault line in indirectly grounding power system, but the frequency range is usually chosen by experience method. In the view of this situation, this paper analytically analyses the frequency characteristics, proposes a method to estimate the frequency range, provides the feature components between fault line and non-fault line and lays the theoretical foundations for high-frequency component selecting. On the basis of frequency analysis, this paper extracts high-frequency components in the selected frequency range by using the existing filtering tool, calculates the relative entropy coefficient matrix combined with the relative entropy theory and then identifies the fault line. Simulation results show that the proposed route selection method has wide applicability and accuracy.关键词
特征分量/暂态电流分量/频率特性/相对熵系数/故障选线方法Key words
characteristic component/transient frequency component/frequency characteristics/relative entropy coefficient/fault line selection method分类
信息技术与安全科学引用本文复制引用
赖平,周想凌,邱丹..小电流接地系统暂态电流频率特性分析及故障选线方法研究[J].电力系统保护与控制,2015,(4):51-57,7.基金项目
国家自然科学基金项目(51207113) This work is supported by National Natural Science Foundation of China (No.51207113) （51207113）
