基于线路沿线故障可能性评估的故障定位方法及其系统研发

发布时间：2018-03-22 08:32

本文选题：故障测距　切入点：评价指标　出处：《华南理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：当输电线路故障时,如能快速准确地定位故障点,可大大减少故障巡线的工作量,缩短故障修复时间,节约大量的人力物力,提高供电可靠性,减少停电损失。因此,输电线路故障定位一直是电力系统研究者所关心的问题。影响故障测距的因素有很多,如故障波形的瞬态畸变。当采用不同的数据窗及测距方法对同一次线路故障进行测距,测距结果往往不尽相同,其准确与否存在偶然性,无法预估其可信度。此外,从故障发生到跳闸全过程中任一段录波数据均含有故障位置的信息,若能充分利用故障全过程的信息进行测距将能提高故障信息资源的利用率,提高故障测距结果的可信度,丰富故障测距结果信息。因此本文针对上述问题,展开了研究,主要工作内容如下:1,基于多种时域和频域故障测距实用方法,以输电线路等间隔选取的计算观测点为研究对象,构建各计算观测点关于各故障测距方法的故障可能性评价指标模型,评价各观测点的故障可能性。2,为充分利用故障信息资源,本文定义了故障测距方法、计算时间窗和输电线路参数3个维度作为故障可能性评价指标计算过程中的环境变量,重复计算考察故障可能性评价指标,并对各观测点获得的各组评价指标值进行加权评估,并以评估值的最高点对应的线路位置作为故障定位参考点,从而获得了一种基于多维故障信息的输电线路故障定位综合评估方法。通过ATP/EMTP仿真软件搭建输电线路故障仿真分析模型,进行全面的故障仿真分析,验证了所提方法的正确性和有效性。3,以常用的故障测距实用算法及所提故障定位综合评估方法为基础,开发故障测距核心算法模块;研究商用ORACLE数据库的访问方法,开发能访问实际保信系统的故障信息监视模块;研究COMTRADE格式故障录波文件,开发录波文件处理模块。4,立足于工程实际,结合保信系统,研发一套基于B/S网络体系架构的故障定位系统,以故障测距核心算法模块、故障信息监视模块及录波文件处理模块等软件模块组成系统后台,使用MYSQL建立故障录波历史数据库、输电线路参数库及故障测距知识库。搭建WEB站点,实现可视化展示定位结果与完成人机交互功能。
[Abstract]:If the fault point can be located quickly and accurately, it can greatly reduce the work load of fault patrol, shorten the time of fault repair, save a lot of manpower and material resources, improve the reliability of power supply and reduce the loss of power cut. Transmission line fault location has always been a concern of power system researchers. There are many factors affecting fault location, such as transient distortion of fault waveform. When different data windows and location methods are used for fault location of the same line, Ranging results are often different, their accuracy is accidental or not, it is impossible to estimate their reliability. In addition, any segment of video data from fault occurrence to tripping contains information of fault location. If we can make full use of the information in the whole process of fault location, we can improve the utilization of fault information resources, improve the reliability of fault location results and enrich the information of fault location results. The main work is as follows: 1. Based on various practical methods of fault location in time domain and frequency domain, the object of study is the calculation observation points selected by transmission lines at equal intervals. In order to make full use of fault information resources, a fault location method is defined in this paper. The three dimensions of calculating time window and transmission line parameters are used as environmental variables in the calculation process of fault possibility evaluation index. The evaluation index of fault possibility is evaluated by repeated calculation, and the evaluation index values of each group obtained by each observation point are evaluated weighted. And take the line position corresponding to the highest point of the evaluation value as the fault location reference point, Thus, a comprehensive evaluation method of transmission line fault location based on multidimensional fault information is obtained. The simulation analysis model of transmission line fault is built by ATP/EMTP simulation software, and the comprehensive fault simulation analysis is carried out. The correctness and validity of the proposed method are verified. The core algorithm module of fault location is developed based on the commonly used practical fault location algorithm and the proposed comprehensive evaluation method of fault location, and the access method of commercial ORACLE database is studied. Develop a fault information monitoring module that can access the actual information protection system, study the COMTRADE format fault recording file, develop the recording file processing module .4, base on the engineering practice, combine the information protection system, A fault location system based on B / S network architecture is developed. The software modules such as fault location core algorithm module, fault information monitoring module and recording file processing module are used to make up the background of the system. MYSQL is used to establish the history database of fault recording. Transmission line parameter library and fault location knowledge base. WEB site is built to visualize the location results and complete the man-machine interaction function.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM75

【相似文献】