A fault location approach for high-impedance grounded DC shipboard power distribution systems
A fault location approach for high-impedance grounded DC shipboard power distribution systems
复制标题
DOI：
10.1109/pes.2008.4596844
复制
发表时间：
2008-07
期刊：
影响因子：
--
通讯作者：
Y. Pan;P. Silveira;M. Steurer;T. Baldwin;P. Ribeiro
中科院分区：
文献类型：
--
作者：
Y. Pan;P. Silveira;M. Steurer;T. Baldwin;P. Ribeiro
在直流分区配电系统(DCZEDS)中实施高阻接地，以保证在接地故障期间不间断运行。为了防止后续的相间故障引起相间故障，将快速、稳健的接地故障定位方法应用于DCZEDS具有重要意义。现有的故障测距技术在应用于含单轨故障的DCZEDS时存在缺陷，且不能适应重复开关暂态引起的高频噪声。本文提出了一种利用合适的系统信号中包含的背景噪声来提取故障位置信息的新思想。多分辨率小波分析和分维分析被用作识别系统信号中的特征特征的信号处理工具。在PSCAD/EMTDC中实现了一个概念上的高保真DCZEDS模型，并通过仿真验证了该方法的有效性。
High-resistance grounding is implemented in the DC zonal electric distribution system (DCZEDS) to permit continuity of service during a ground fault. To prevent subsequent phase-to-ground faults on the other phase from causing a disruptive phase-to-phase fault, it is of great importance that fast and robust ground fault location methods be applied to the DCZEDS. Current fault locating techniques have shortcomings in their application to the DCZEDS with ldquocommon-railrdquo faults and with accommodating the high frequency noise caused by repetitive switching transients. In this paper, a new idea is presented which utilizes the background noise contained in a suitable system signal to extract information about the fault location. Multi-resolution wavelet analysis and fractal dimension analysis are used as examples of signal processing tools for recognition of characteristic features in the system signal. A notional, high-fidelity DCZEDS model in PSCAD/EMTDC is implemented and used to illustrate the effectiveness of the proposed method through simulation.