Detection of High Impedance Fault in Power Distribution Systems Using Mathematical Morphology
Detection of High Impedance Fault in Power Distribution Systems Using Mathematical Morphology
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DOI：
10.1109/tpwrs.2012.2215630
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发表时间：
2013-05
影响因子：
6.6
通讯作者：
S. Gautam;Sukumar M. Brahma
中科院分区：
文献类型：
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作者：
S. Gautam;Sukumar M. Brahma
高阻抗故障 (HIF) 的特点是配电系统中故障电流小、非线性、随机、不稳定且变化范围大。 HIF 消耗的故障电流非常低，因此传统的过流继电器并不总是能够有效地清除故障电流。提出了各种方案来检测此类故障。本文提出了一种使用基于数学形态学 (MM) 的工具来检测 HIF 的方法。该方法与变电站的传统过流继电器一起实施，以提高该继电器检测 HIF 的性能。它在标准测试系统上经过严格测试，使用 PSCAD/EMTDC® 生成测试波形，并使用 Matlab® 实施该方法。仿真结果表明该方法快速、安全、可靠。
A high impedance fault (HIF) is characterized by a small, nonlinear, random, unstable, and widely varying fault current in a power distribution system. HIFs draw very low fault currents, and hence are not always effectively cleared by conventional overcurrent relays. Various schemes are proposed to detect such faults. This paper presents a method to detect HIFs using a tool based on mathematical morphology (MM). The method is implemented alongside the conventional overcurrent relay at the substation to improve the performance of this relay in detecting HIFs. It is rigorously tested on standard test systems using PSCAD/EMTDC® to generate test waveforms, and Matlab® to implement the method. Simulation results show that the proposed method is fast, secure, and dependable.