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1、第33卷第9期高电压技术Vol.33No.9·38·2007年9月HighVoltageEngineeringSep.2007基于DSP的电子互感器模拟量校验仪1122许德胜,曹阳,叶国雄,余春雨(1.华中科技大学光电子科学与工程学院,武汉430074;2.国网武汉高压研究院,武汉430074)摘要:为达到电子互感器模拟量校验的目的,介绍了以数字信号处理器(TMS320F206)为核心的新型电子互感器校验仪,论述了测差原理及实现方法。该校验仪利用快速傅立叶算法和锁相环技术,能准确测定出电子式互感器的比值误差、相位误差、电源频率、谐波等多个技术性能指标。校验符合国际电工委员会标准I
2、EC6004427《电子式电压互感器》以及IEC6004428《电子式电流互感器》的要求。关键词:校验仪;锁相环;数字信号处理器;快速傅立叶变换;比值误差;相位误差中图分类号:TM452文献标志码:A文章编号:100326520(2007)0920038203DevelopmentofCalibratorBasedonDSPforAnalogOutputofElectricalInstrumentTransformers1122XUDe2sheng,CAOYang,YEGuo2xiong,YUChun2yu(1.CollegeofOptoelectronicsScienceand
3、Engineering,HuazhongUniversityofScienceandTechnology,Wuhan430074,China;2.WuhanHighVoltageResearchInstituteofSGCC,Wuhan430074,China)Abstract:Transformercalibratoriswidelyusedbytheelectricpowerdepartmentandthemeasuredepartment,witheconomicdevelopmentandlivinglevelconstantlyraised,electricdepart
4、mentproposenewrequirementwithaccuracyandreliabilityofelectricpowerrecorddevice,andthedeflectionoftransformercalibratoristhemainreasonthataf2fectstheaccuracy.However,thetransformercalibratorsusedinourcountrynowarebehindthetimes,mostofthemweredevelopedin1960-1970years,althoughtherearesomedigita
5、landintelligentproducts,theyarenotver2ysatisfiedforthemanyreasons,suchasthestabilityisnotgood,thedisplayofdigitalisslow,thedegreeofauto2mationislow,andsoonsotodevelopanewtypeoftransformercalibratorwhichhasthehighprecisionandthehighdegreeofautomationissignificativefortheoutdatedtransformercali
6、bratorwidelyused.Thispaperanalyzethethe2oryofpreviouscalibratorsandproposeanideaofdesigninganewtypeofintelligentcalibrator,basedonthetheoryofmeasuringthedifference,adopttheprojectofDSPstructure,alsousehighspeedA/Delectricchip.Duringthedesignofhardwarecircuit,thetheoryofFFTandsynchoronoussampl
7、ingmethodisadopttoreachthedemandofprecision.Thispaperalsodiscusstheintelligentdevelopmentoftransformercalibrator,achievesomesuccessinthestudy.AnewtransformercalibratorwithDSPtechniqueisdesignedbythepaper,whichimprovestheinstrumentintegration,
