电力电缆在线监测系统的研究与设计
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摘要
电力电缆在电力系统中应用越来越广泛,实现电缆的安全、可靠和经济运行对保证电力系统的安全性和经济性具有十分重要的意义。在电缆运行过程中,电缆线路发生电气故障前都会引起电缆或附件局部温度的上升,从而导致绝缘进一步破坏直至击穿。基于分布式光纤温度传感技术(DTS,Distributed temperat ure sensoring)实现电缆沿线表皮温度监测,通过分析电缆温度场与动态载流量能及早发现电缆运行存在的安全隐患,起到防患于未然的作用。
本文则对电力电缆在线监测系统展开研究与设计,首先对电力电缆监测系统的研究意义和本文选题背景进行分析,并充分结合国内外此课题的研究现状进行综述,对本文研究内容进行简单的介绍;接着对电力电缆监测相关理论进行概述,首先阐述本系统的监测任务,对DTS和载流量进行分析计算,对分布式光纤温度传感技术进行介绍,分析电力电缆的结构,采用热路模型对电力电缆载流量进行详细计算,分析电缆故障在线监测方法、局放监测技术,建立电力电缆仿真模型;然后对系统结构进行设计,首先介绍系统设计原则和依据,对系统功能进行介绍,对系统硬件、软件进行详细设计,设计分析数据库系统,接着实现系统的核心功能,首先分析系统开发工具和运行环境,对系统软件结构进行设计,对数据接收模块进行设计和实现,对数据处理模块进行设计和实现,对系统状态显示进行分析,实现对数据的监视,实现数据报表以及数据库的设计,实现报警设置和响应,实现事件日志用户管理以及系统配置的设计,最后对进行测试与分析。
关键词:电力电缆;在线监测;电缆故障;系统设计
ABSTRACT
Power cablesin the power systemused more and morewid ely, realize the securityand reliabilityof cable and economic operationof the power system to ensure safety and economicbehaviorhas the very vital significance. In the cable running proc esses, cable line happened beforeelectrical fault can cause cableor accessories localtemperature rise,resultinginfurtherdamageinsulation untilthe breakdown. Based on the Distributedoptical fibertemperature sensor technology (DTS, Distributedtemperature sensoring) realize cable skin temp eraturemonitoring along, through theanalysis ofthe temperature field anddynamic cable carrying capacitydetected early cablerunning the safe hiddentroublethat exist, have th efunction of the nip in thebud.
Thispaper is on-line monitoring system of powercablelaunched research and design, first ofpower cable monitoringsystemthe research significanceand choosea background in this paper are analyzed, and fully inthe subject bothat home andabroadwerereviewed the current situation of the study, this papertheresearch content of the simpleintroduction; Thenthe power cable monitoring the related theory were reviewed in this paper, firstly this system monitoring task,DTS and loadflow analysis and calculation,the distributed opti cal fiber temperaturesensing technology are introduced,analyzes the structure of the power cable, the thermal model of power cable roadcarrying capacitycalculation,analysis ofon-linemonitoringmethod, cablefaults bureau put monitoring technology,establishing power cable simulation model. And then the systemstructure design,thispaper introducesthe system first design principles andbasisfor system function isin troduced, the system hardwareand software forthe detailed design, design analysis database system, andthen realize the core ofthe system function,first analysis system development tools
and runningenvironment, the system structure of thesoftware designofdata receiving moduledesignand implementation, on dataprocessing module design and implementation,the system state display to carry onthe analysis,make thedatamonitoring, realizedata report and databasedesign, realization alarm Settingsand response,realize the eventlog user managementand system configurationdesign,finaltest and analysisof.
Keywords:Electric cables; Onlinemonitoring; Cablefaults;System design