基于可变行波辨识时窗的单端故障定位方法

发布时间：2018-03-29 16:41

本文选题：测距　切入点：单端　出处：《电力系统保护与控制》2014年24期

【摘要】：提出了一种基于改进分布参数法的可变时窗单端行波故障定位方法。该算法通过对端系统阻抗的在线估计,构建改进的分布参数法,改善常规方法误差分布的不规律性,提升依据工频量定位误差构建组合定位算法的可行性。探索改进分布参数法的定位误差分布,根据故障条件和误差规律计算可变的故障距离窗口,由此划定行波反射波辨识的可变时窗。基于该时窗,综合考虑测量本端和对端的母线接线方式、相邻母线反射波的影响等因素,构建可变时窗内的故障行波反射波辨识方法及定位方法。仿真验证结果表明,该方法提高了组合定位方法的可靠水平,故障定位精度较高,具有一定工程应用价值。
[Abstract]:Based on the improved distributed parameter method, a variable time window single terminal traveling wave fault location method is proposed. By on-line estimation of the impedance of the end system, an improved distributed parameter method is constructed to improve the irregularity of the error distribution of the conventional method. The feasibility of constructing a combined location algorithm based on the power frequency error is raised. The location error distribution of the improved distribution parameter method is explored, and the variable fault distance window is calculated according to the fault conditions and error rules. Based on the variable time window of traveling wave reflection wave identification, the factors such as the busbar connection mode of the measuring end and the opposite end, the influence of the adjacent bus reflected wave and so on are considered synthetically. The identification method and location method of fault traveling wave reflection wave in the variable time window are constructed. The simulation results show that the method improves the reliability level of the combined location method, and the fault location accuracy is relatively high, which has certain engineering application value.
【作者单位】：山东大学电气工程学院;滨州电力公司;
【基金】：山东省博士后专项基金资助项目(201103032) 国家自然科学基金项目(51177091)~~
【分类号】：TM73

【共引文献】