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1、随着我国电力事业的蓬勃发展,电力设备国产化进程的加大,电力系统对电力设备的要求也越来越严格。基丁目前的电力测量设备的要求,本文捉出并设计了基于电磁感应原理的非接触式PT设备,该设备主耍由电磁信号采集单元、信号处理及传输单元和数据监控及分析单元组成。全文出电压互感器的概述、电磁感应原理的介绍、电磁信号采集系统设计、模拟处理单元设计和单片机系统设计五部分组成。介绍了电压互感器的发展及现状;综合论述了该设备的需求和功能设计,并给岀了系统整体构架;电磁信号采集装置的设计;根据系统要求设计模拟处理单元电路,并通过单片机
2、控制电路实现温度补偿,提高设备的测量精度。利用电磁感应实现的非接触电压测量的方案解决了接触测量带來的许多无法解决的问题,完全隔离了高电压电路,避免电磁干扰、电磁饱和的缺陷,测量范围大、体积小、重量轻及便于数字传输等优点,适合于各种电压等级特别是在超高压开关设备屮的应用。关键词:电磁感应,非接触式,电压互感器,单片机ABSTRACTWithourbusinessboomingandtheprocessofelectricpowerequipmentlocalizationstrengthening,thesys
3、temtopowerequipmentrequirementsarestrictly,basedoncurrentelectricitymeasuringequipmentrequirements,thepaperputforwardandcreatedbasedonelectromagneticexposureinalloftheprincipleofthePTequipment,theequipmentismainlyduetoelectromagneticsignalcollectingunit,the
4、signalprocessingandtransmissionofdataandanalysisunitandmonitoringunits.Thefulltextiscomposedoffiveparts:thevoltagePToverviewandintroduction,theprincipleoftheelectromagnetic"electromagneticsignalcollectingsystemdesign,aprocessingunitmonolithicintegratedcircu
5、itsdesignandsystemdesign.ItintroducesthedevelopmentofthevoltagePTandcurrent;comprehensivedealswiththedeviceneedsandfunctions,andgivesasystemofoverallframework;electromagneticsignalcollectingdesignofthesystemisdesignedtosimulate;designestheprocessingunitcirc
6、uit,anditismonolithicintegratedcircuitstocontrolcircuitandimproveequipmenttemperaturemeasuringprecision.Usingelectromagneticrespondtotheimplementationcontactofthevoltagemeasurementsolvesmanyoftheunresolvedproblems,It'scompletelyisolatedfromahighvoltageelect
7、ricalcircuit,avoidselectromagneticinterferenceandelectromagneticsaturated,andithaswidemeasuringrange,smallvolume,lightweightandforadvantagestodigitaltransmission,Itappliestovaryingvoltagelevels,especiallyinthesuperpowerswitchdeviceapplications.KEYWORDS:elec
8、tromagneticinduction,noncontact,potentialtransformer,MCU-•—1—m§第1章绪论21.1系统开发背景21.1.1电压互感器简介21.1.2电力事业的飞速发展41.2电子式电压互感器研究现状4第2章系统需求分析与设计方案的确定62.1系统需求分析62.2系统设计原理及构架62.2.1系统设计原则62.2.2系统设计方案的确定7第3章系统模拟部分硬