多判据融合小电流接地故障选线方法的研究

发布时间：2018-05-13 01:27

本文选题：单相故障选线 + 小电流接地系统　；参考：《辽宁工程技术大学》2014年硕士论文

【摘要】：电网漏电保护是继电保护的重要内容,特别是小电流接地系统的漏电保护,一直是电力系统研究的重要部分。以往单一的选线方法有一定的局限性和适用性,并且故障选线时没有用到对选线有利的故障信息,选线的灵敏性及可靠性并不高。本文通过研究分析现有漏电保护方案,提出了基于模糊理论的多判据融合选线方法,该方法通过将优势互补的现有方法运用模糊数学的方法进行融合,根据不同的选线方法利用对选线有利的故障数据,构造一种由多种判据组成的综合选线方法。文章在分析了多判据融合选线方法的理论基础上,利用MATLAB软件对相应电力系统模型进行仿真,通过仿真验证选线方法是否正确以及可行,并以此理论为基础,设计了基于TMS320F2812控制器的系统硬件,选择MAX1308同步采样芯片保证数据采集的同步；本文还对系统的软件部分做了详细叙述。通过在实验室条件下搭建的电力系统中进行漏电故障选线实验来验证选线方法的正确性及可靠性。
[Abstract]:Power grid leakage protection is an important part of relay protection, especially the leakage protection of small current grounding system, which has been an important part of power system research. The former single route selection method has some limitations and applicability, and the fault information is not used in fault line selection, so the sensitivity and reliability of line selection are not high. By studying and analyzing the existing leakage protection schemes, this paper puts forward a multi-criterion fusion line selection method based on fuzzy theory, which uses the fuzzy mathematics method to fuse the existing methods with complementary advantages. According to different route selection methods, a comprehensive route selection method is constructed based on fault data which is advantageous to line selection. On the basis of analyzing the theory of multi-criterion fusion line selection method, the paper simulates the corresponding power system model by using MATLAB software, and verifies whether the method is correct and feasible, and based on the theory. The hardware of the system based on TMS320F2812 controller is designed and the synchronous sampling chip of MAX1308 is selected to ensure the synchronization of data acquisition. The software part of the system is also described in detail in this paper. In order to verify the correctness and reliability of the line selection method, the leakage fault line selection experiment is carried out in the power system under laboratory conditions.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM862

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