基于改进petri网算法的电网故障诊断研究

发布时间：2018-06-23 18:28

本文选题：电力系统 + 有色petri网　；参考：《天津理工大学》2017年硕士论文

【摘要】：电网故障正确诊断对加快事故处理和恢复电力系统的安全经济运行具有重要的意义。为减小电网故障搜索范围,避免对电网内所有元件依次进行故障判断,本文改进传统一种方式以皮特律的算法结构进行识别,在检测的部位结构中影响不同;有效地把故障诊断问题局限于一个或多个无源网络中。首先,针对断路器跳闸引起电网拓扑结构变化这一离散事件的动态过程,以petri网作为建模工具,对全部元件赋予颜色属性并允许有向弧上有可变的权,构建用于电网故障区域搜索的有色petri网模型;然后以CPNTOOLS为开发环境,运用VB语言编程实现对故障区域的快速搜索。为减小电网故障诊断过程中人为主观因素造成的误差,提高petri网模型的容错性和准确性,本文提出了基于改进动态自适应模糊petri网电网故障诊断方法。首先,在动态自适应模糊petri网中引入补充弧元组,电网有其次的模型构造在数目以及指标的演练中需要进一步的推理计算,并用BP算法进行构造。;最后,分析了该故障诊断方法的适应性与容错性。通过对江苏南平区的电网进行当地结果测量和验证中得出了在petri网的改进算法中,克服了大电力系统的保护不正确的形式以及复杂结果方法,并且以各种的电网故障诊断的方法进行对传统petri网的故障检测方法不能实现的电网,得到了修正,诊断结果,具有良好的容错性。
[Abstract]:The correct fault diagnosis of power network is of great significance for speeding up the handling of accidents and restoring the safe and economical operation of power system. In order to reduce the range of fault search and avoid the fault judgment of all the components in the power network, this paper improves the traditional algorithm structure of Pitt's law to identify the fault, which has different influence on the structure of the detected parts. Fault diagnosis is effectively confined to one or more passive networks. First of all, in view of the dynamic process of the discrete event of circuit breaker tripping, the petri net is used as the modeling tool to assign color attributes to all components and to allow variable weights on the directed arc. The colored petri net model for fault area search of power network is constructed, and then the rapid searching of fault area is realized by using VB language with CPNTOOLS as the development environment. In order to reduce the error caused by human subjective factors in the process of power network fault diagnosis and improve the fault tolerance and accuracy of petri net model, a fault diagnosis method based on improved dynamic adaptive fuzzy petri net is proposed in this paper. Firstly, the supplementary arc element is introduced into the dynamic adaptive fuzzy petri net. The second model of the power network needs further reasoning and calculation in the exercise of the number and the index. Finally, the BP algorithm is used to construct. The adaptability and fault tolerance of this fault diagnosis method are analyzed. By measuring and verifying the local results of the power network in Nanping District of Jiangsu Province, the improved algorithm of petri net is obtained, which overcomes the incorrect form of protection of large power system and the complex result method. The fault detection method of traditional petri net can not be realized by using various methods of power network fault diagnosis, which is corrected and diagnosed, and has good fault tolerance.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP301.1;TM711

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