基于DSP的FTU在配电网故障定位的研究

发布时间：2018-01-15 08:14

本文关键词：基于DSP的FTU在配电网故障定位的研究　出处：《安徽理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：现代电力系统规模大、互联紧密,一个信息化和自动化程度高的配电自动化系统来监测、保护和管理配电网运行显得尤为重。馈线线路上的智能柱上终端FTU(Feeder Terminal Unit)是系统中的重要设备。线路上一旦有故障发生,系统根据FTU上报信息利用定位算法能够迅速准确的定位故障区并下达指令遥控FTU处理故障。因此对FTU的设计和定位算法的研究具有重要的意义。本文首先介绍了基于FTU远方控制的故障定位方式符合现代配电系统的发展。以TMS320F2812为处理器对FTU的硬件设计作了详细介绍,主要有数据采集、通信、电源模块的设计,引入FFT算法对采集的数据进行处理。设计了 FTU软件实现流程。接着,文章研究了故障定位算法,由于人工智能算法在定位过程中往往不能可靠收敛,因而又将视线转移到以配电网拓扑图为基础的矩阵定位算法上。在矩阵定位算法中馈线线路末梢段在拓扑图中无法描述造成盲区。因此,本文在常用的有向图基础上进一步分层,以此为基础提出增加模拟节点法定位末梢故障区段。FTU通常装设在户外受现场环境影响导致信息缺失和错误。为保证矩阵算法可靠定位,在信息缺失时提出了相关性原理弥补缺失信息,在信息错误时提出了流过负荷变化原理纠正错误信息,提高矩阵算法的容错性。最后,搭建典型的配电网络对算法进行验证,模拟故障发生在末梢段以及FTU信息缺失和错误的情况下验证算法。结果验证了算法的可行性。
[Abstract]:Modern power system is large in scale, closely interconnected, a high degree of information and automation distribution automation system to monitor. Protection and management of distribution network operation is particularly heavy. Intelligent Pillar Terminal FTU(Feeder Terminal Unit on feeder Line. Is an important equipment in the system. Once there is a fault on the line. According to the information reported by FTU, the system can quickly and accurately locate the fault zone and send instructions to remote control FTU to deal with the fault. Therefore, it is of great significance to study the design of FTU and the location algorithm. This paper first introduces that the fault location mode based on FTU remote control accords with the development of modern distribution system. The hardware design of FTU is introduced in detail with TMS320F2812 as the processor. The main data acquisition, communication, power module design, the introduction of FFT algorithm to process the collected data. The design of FTU software flow. Then, this paper studies the fault location algorithm. The artificial intelligence algorithm often can not converge reliably in the localization process. Therefore, the line of sight is shifted to the matrix location algorithm based on the topology graph of distribution network. In the matrix location algorithm, the end of feeder line can not be described in topology graph, which results in blind area. In this paper, based on the commonly used digraph, we further delaminate. Based on this, it is put forward that adding simulated node method to locate the terminal fault section. FTU is usually installed in the outdoor, which is affected by the field environment, which leads to the lack of information and error. In order to ensure the reliable location of matrix algorithm. When the information is missing, the correlation principle is put forward to compensate for the missing information, and the overload change principle is put forward to correct the error information when the information is wrong. Finally, the fault tolerance of the matrix algorithm is improved. A typical distribution network was built to verify the algorithm, and the simulation fault occurred at the end of the network, and the algorithm was verified in the absence and error of FTU information. The results proved the feasibility of the algorithm.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM711;TM76

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