摘要在现代电力系统中，无功功率补偿装置保证电力系统的安全稳定运行，大量地运用无功功率补偿装置在电网中，可以有效地改善系统的无功因数。电力电容器是保障系统稳定运行的前提，因为长期运行中的电力电容器是不可以直接进行检修的，发生故障后一般无法修补，毁坏次数也会逐渐增多，电力电容器甚至会爆炸。83929

本文首先对电力电容器的现状和研究意义进行阐述和研究，在电力系统中，基本采用并联补偿电容器，当变电站的温度、湿度发生变化时，都会对测量值造成影响。本文运用Matlab进行仿真，建立35KV的电力电容器内部结构的物理模型，通过仿真，分析得到流过电力电容器的电流与电力电容器电容量的关系，以此设计了故障定位法，根据电力电容器电流的变化判断电力电容器是否发生故障。通过这种方法可以避免温度、湿度等要素的变化使相应结果之间产生差异。本文开发设计的软件系统是基于Labview的可视化的编程环境，对故障运行状态进行全名的仿真验证。

本文深入探究了35KV电容器组的内部结构，通过对差分算法的理解阐明了针对变电站复杂环境的电力电容器进行在线监测与故障诊断的算法，达到了实时监测电力电容器的状态的目标。

毕业论文关键词  电力电容器  在线监测  故障定位  物理模型  差分算法

毕业设计说明书外文摘要

Title  Research on Intelligent Fault Diagnosis Method for  Power Capacitor                                   

Abstract  Reactive power compensator is used to ensure the secure and stable revolution in power system。 In the modern power system , utilizing a great deal of the Reactive power compensator is able to improve the reactive power factor。 However, when the number of destruction in power capacitor is large and power compensator is beyond repair in the ordinary course of events, even exploding, so power compensator is the important precondition of stable revolution in power system。

Firstly, the state and the issue of the power compensator are elaborated and researched in the article。 In the power system, we use parallel reactive power compensator frequently。 In most cases, the temperature, humidity, the change of  voltage in power capacitor will make the measurement mistake。 This paper establishes the physical model of capacitor internal structure based 35KV。 By Simulink of Matlab Simulating, the article get the relationship between current and capacitance of power compensator。 Based on the former, the paper design the fault location method, according to the current of power compensator to judge fault complexity of the power compensator。 This method can eliminate the influence about  the experimental results temperature and voltage fluctuation。 This method makes sense for it can improve or diminish mistake brought by environmental change。 The development of the software system design is based on Visual programming environment on Labview, simulating the fault running state。 

In this paper, we go into details of the internal structure of 35KV capacitor bank, on this basis, proposing the on-line monitoring and fault algorithm for the complex environment of the substation, which can realize the real-time monitoring of the status of the capacitor。

Keyword:  power capacitor  on line monitoring  fault location  physical model   

 difference method

目   次

1 绪论 1

1。1 研究目的与意义 1

1。2 国内外研究现状