目录摘要.......................................................................................................................................1Abstract.................................................................................................................................21绪论...................................................................................................................................31.1电力设备状态监测及故障诊断..............................................................................31.1.1状态监测故障诊断的概念............................................................................31.1.2电力系统进行状态监测和故障诊断的重要意义........................................31.2变压器在线监测研究现状......................................................................................42变压器在线状态监测工作原理.......................................................................................52.1变压器基本结构与分类..........................................................................................52.2变压器在线监测原理与方法..................................................................................62.2.1油中气体在线监测的实现............................................................................62.2.2变压器微水含量在线监测............................................................................72.2.3变压器温度在线监测....................................................................................73大型变压器在线监控系统的硬件设计...........................................................................83.1大型变压器在线监控系统信号采集的实现..........................................................83.1.1油中溶解气体监测用传感器........................................................................83.2大型变压器在线监控系统的PLC选择...............................................................113.2.1西门子PLC介绍.........................................................................................113.2.2西门子系列S7-200PLC扩展模块选择与CPU的选择............................123.3传感器与EM235接线图......................................................................................153.3.1MQ系列气体传感器与EM235接线.........................................................153.3.2PT100温度传感器与EM235接线.............................................................163.3.3PT100微水传感器与EM277接线.............................................................173.4大型变压器在线监控系统电压源模块................................................................174大型变压器在线监控系统的软件设计.........................................................................204.1组态王软件的概述................................................................................................204.2组态王程序设计步骤............................................................................................204.3基于组态王的监控画面设计................................................................................204.3.1外部设备的定义..........................................................................................204.3.2定义变量......................................................................................................204.3.3监控主画面设计.....................................................................
