配电网多分支线路故障行波定位技术研究

发布时间：2018-10-21 17:45

【摘要】：如何寻找一套快速,有效的配电网故障选线与定位的方案,已经成为电力系统建设与发展所面临的一个重要课题。由于配电网多为小电流接地系统,故障特征量不明显,且网络结构复杂,使得很多针对配电网的故障选线与定位的方法在应用中,均得不到理想的效果。为此,论文研究了基于行波论文的配电网故障定位的方法,有望解决配电网多分支线路故障定位的难题。论文首先对国内外的研究现状进行了概述,比较了现有配电网故障选线与定位方法的优缺点；在研究了故障行波在配电网上的传输特性的基础上,分析了混合线路、多分支线路及配电变压器对行波传输的影响；分析了配电网的拓扑网络结构,以经济性与可观性为目标约束条件,提出了启发式搜索法与模拟退火算法相结合的配电网行波检测装置的优化配置方案；在前期研究的基础上,研究了配电网故障选线的方法。借助D型行波测距算法,刻画了故障距离与故障分支之间的相关性,构建了配电网故障选线的判据模型,通过融合多组D型行波测距系统的故障选线结果,最终确定故障线路；在故障选线的基础上,对于传统的单端定位法在配电网故障定位中的局限性进行了研究,通过对比初始故障行波与第一分支节点的反射行波在线路中的传输特性,提出了利用第一反射行波计算故障距离的新型单端故障定位算法。论文搭利用ATP仿真软件搭建了配电网仿真模型,对该文中所提出的行波检测装置的优化配置方案及故障选线与定位方案进行了仿真分析。理论分析及仿真结果可知：论文所提出装置优化配置方案能够有效的实现配电网的行波检测装置的优化配置,减少了应用成本；同时,论文所提出的基于行波理论的故障定位方法能快速、准确的选出故障线路,精确故障位置且不存在伪故障点问题,有利于行波法在配电网故障定位研究中的推广
[Abstract]:How to find a fast and effective scheme of fault line selection and location in distribution network has become an important subject in the construction and development of power system. Because the distribution network is mostly small current grounding system, the fault characteristic quantity is not obvious, and the network structure is complex, many methods of fault line selection and location for distribution network can not get the ideal effect in application. Therefore, this paper studies the method of distribution network fault location based on traveling wave paper, which is expected to solve the problem of multi-branch line fault location in distribution network. Firstly, this paper summarizes the current research situation at home and abroad, compares the advantages and disadvantages of existing fault line selection and location methods, analyzes the transmission characteristics of fault traveling wave on distribution network, and analyzes the hybrid line. The influence of multi-branch lines and distribution transformers on traveling wave transmission is analyzed. An optimal configuration scheme of traveling wave detection device in distribution network combining heuristic search method and simulated annealing algorithm is proposed, and the method of fault line selection in distribution network is studied on the basis of previous research. Based on the D-type traveling wave location algorithm, the correlation between fault distance and fault branch is described, and the criterion model of fault line selection in distribution network is constructed. Finally, fault line is determined by merging the fault line selection results of multi-group D-type traveling wave location system. On the basis of fault line selection, the limitation of the traditional single terminal localization method in fault location of distribution network is studied. The transmission characteristics of the initial fault traveling wave and the reflected traveling wave of the first branch node in the transmission line are compared. A novel single-terminal fault location algorithm using the first reflection traveling wave to calculate the fault distance is proposed. In this paper, the simulation model of distribution network is built by using ATP simulation software, and the optimal configuration scheme, fault line selection and location scheme of traveling wave detection device proposed in this paper are simulated and analyzed. Theoretical analysis and simulation results show that the proposed optimal configuration scheme of the device can effectively achieve the optimal configuration of traveling wave detection device in distribution network, and reduce the cost of application, at the same time, The method of fault location based on traveling wave theory proposed in this paper can select fault lines quickly and accurately, and there is no pseudo-fault point problem, which is beneficial to the popularization of traveling wave method in fault location research of distribution network.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM75

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