基于电容分压的电子式电压互感器的研究

华中科技大学硕士学位论文基于电容分压的电子式电压互感器的研究姓名：韩世忠申请学位级别：硕士专业：电工理论与新技术指导教师：徐雁20060430IIIAbstractVoltagetransducerarethebasicmeasurementinstrumentsforenergymeasurementandrelayprotectionintheelectricpowersystem.Withtheincreasingdemandfordigitizationandautomationintheelectricpowersystemcontrolandprotectionetc.,conventionalPTandCVTtransducerscouldnotsatisfytherequirementofthemodernpowersystemanymore.However,becauseoftechnicalproblem,theopticalvoltagetransducersarestillunreliable.Atpresent,peoplebegantoshowmoreinterestsonelectronicvoltagetransducers,whicharebasedonelectronics,micro-computerandfibercommunicationtechniques,becauseoftheirgoodstabilization,reliabilityandwell-performedsensortechnology.Accordingtoanalysisandcomparisonfordifferentsensortechnology,thedrytypecapacitordividerischoosedasvoltagesensor,whosetemperaturewillbetestedbytemperaturesensors.Thevoltageandtemperatureinformationistransferredbyopticfiberandprocessedmainlyincontrolroom.Thispaperintroducesthedesigndetailsaboutdataacquisitionsystemandtheideaanddesignaboutmergingunit.Withstudyingonthetemperaturecharacteristicaboutthecapacitordivider,thepaperdiscussestemperaturetestandcompensationaboutEVT.Toqualifyfortheinsulatingproperty,accuracyandstabilityoftheEVT,seriesoftestsweredoneinthelaboratoryandWuhanInstituteofHighVoltage.AccordingtoIEC60044-7andGB1207-1997,andmainparameteroftheEVT,thispaperrepresentstheexecutionofthetestsandanalysesthetestresult.Finally,thispaperintroduceEMCmeasuresaboutthewholeEVTsystem.Keywords:EVT,Capacitordivider,Dataacquisition,Mergingunit,Temperaturecompensation,EMC_____111.11.1.11.1.1.121.1.1.231.1.21.1.2.1OpticalVoltageTransducerOVTOVTPockelsKerr:41.1.2.2ABB1(DOIT)2PASSGIS3(i-ZS1)51.1.31.2612312345722.12.1.12.1R1R2SU1U2211RRk+=2Rk82.1.2CVT2.2C1C2U1UC1UC2211CCUUU+=112112KUUCCCUC=+=)/(212CCCK+=1c2c92.1.32.22.3IECIEC60044-7102.32.33VFCADCLEDVFC11VFCADCADC1A/D23ADCADCADC1233.1133.231433.33.3.1CVT2.2CVTCVT3.3.1.1153.3.1.23.3.1.3163.3.1.43.3.1.5CVT173.3.233.23-1RCjCjRURCjCjRCjU+=++2222211111wwwww21RRR+=,jwww∠=++++=AUCCRRCjCCCRUU12212212112212)(1)(j18kVU3/2201=VU8.73=3.3.2.1RCSsUsU+=11)()(12RCSsUsU1)()(12≈∫=dttURCtU)(1)(122221211)()(CRjUjUwww+=193.4R1C)(1)(112sUSCRsU-=36tdtUCRtU)(1)(112∫-=37TTCRAT10)1(+=38A0A0105203.5R2)()(12sUsU12211RCsRR⋅+-=3912CsRCsRsUsU1121)()(-≈CRjUjU1121)()(www=310)(wjj90o31139wjs=)()(12wwjUjU2222212212111/CRCRjRRCRjRRwww+⋅--=⋅+-=3122222121211)()(CRRRjUjUwww+=31321222211221211111111()RRCRRCRCRCwweww-+==-+31422)1(CRXw=Taylor222)1(2121)83211(1CRXXXwe=≈-+--=Κ315312)(wjj180)(2CRarctgw311ο90)(2-=CRarctgwj3.3.2.222)(SG)()(12SUSUabRSCRRRSCRR+-020010aRbR)(SG)()(12SUSU110000+-SCRSCRwjS=)(wjG)()(12wwjUjU110000+-wwCjRCjR)(wjG)()(12wwjUjU110000+-wwCjRCjR2U1U)2arctan(212arctan2020200fCRCRCRppwwpf-≈--=f0R0C0R0C0R0C23f00CRwf00CRwf0R0C0R0C)(wjG)()(12wwjUjU000011CRjCRjww+-)2arctan(212arctan2020200fCRCRCRpwwf-≈--=00CRwf00CRwf0R0C3.3.2.3MSP430514CPU3.724CPUMSP4303CPUCPUMCU1µAMSP43050nAMSP430F1101A3.3V2MHzA/D3.88µs25A/D3.3.2.4A/DA/DA/DA/DA/DA/DA/D26A/DA/DA/DINLDNLINL16A/D±4LSBINL±2/65536±0.006%A/DSNR[])(76.1)(02.6dBNSNR+=THD))(lg(2022322dBVVVVTHDSN+++=ΛVSV2V3VNSINAD27ENOB[]02.6)2lg(1076.1asffSINADENOB--=fsfs/2faENOBA/DA/DA/DTIA/DADS832516DNL1LSBINL±4LSB(±0.0061%)±16LSB(±0.0244)±12LSB(±0.0183%)±32LSB(±0.0488)±4LSB(±0.0061%)ENOB2kHz14.7bitADS83252.7V5.5V2.7V10kHz1mWA/D28A/DA/D-4085161ppm/4.096V3ppm/°C16µVP-P(0.1Hz10Hz)40µA±0.04%()15mA3ppm/°C(-404025195ppm(3ppm/°C×65°C)12ADCADCADCADS8325SARADCchargeredistributionADC/ADS832529+R1C1RswCshADCADC3.9RCADCADCC1ADCR1C1R130O50OC1ADCCsh510ADCADC(SNR)ADC1216ADCTHD(THD+N)ADC(S/N+D)30ADCADC0.1%0.01%160.0015%ADCADC)1/(bVOOOUTARR+=,ROAVOßTIOPA340/RailtoRailCMOS5.5MHz2kHz0.01%1.6µs250µsTHD+N103dB0.0007%ADS8325S/N+D91dBADCOPA333A/DADS832533.1031SHDNCS/DCLOCK221MHz22µsF1101A3.3VADS83255VADS8325OUTD3.83.110A/DDCLOCK/OUTD/323.3.2.5ADS83253.12VR2413RRRR=)(13iROVVRRV-=(3-21)3.3.2.6//(1)/LED33+3.3VLogicinR74LVC1G073.1374LVC1G073.3V24mALEDVCSEL3.3VLVC5VCMOSTTLADS8325OUTD74LVC1G0674LVC1G07(2)//PINPINPIN/PIN/34AgilentHFBR-2412/PIN3.14/+5V5MBd820nm3.3.35V5V3V(LDO)LDO35mVmVµALDOLDOLDO/LDO3.155V+5VLDO+3V-5V+5VGNDLDO-5V+5VGND+5V+3.3VGND3.43.4.136373.4.2383.4.339FPGADSPNICFPGA16bitDSPDSPFPGAFPGADSPFPGADSPFPGADSPFPGADSPDSP1FPGA2DSPFPGA3FPGA4DSP23(4)5DSPDSPFPGA3.19403.541IEC600447IEC600448D/A3.20DSPDACDSP4244.14.14.14.1434.1C1(nF)C2(nF)C1/C2-36.09434.55787.950.551-24.67434.57787.070.55114.5427.59765.640.55719.7427.07766.30.55721.8427767.350.55635.32425.13762.420.55736.87424.83763.030.5574.2C1(nF)C2(nF)C1/C2-200.26180.0326-400.268.20.0317-300.268.160.0319-200.268.110.0321-100.268.070.032200.2628.050.0325200.267.970.0326400.267.890.0330600.267.810.0333800.2567.730.03311000.2587.70.0335800.2537.690.0329600.2547.720.0329400.2537.790.0325200.2547.840.032400.2587.870.0328-100.2567.880.0325-200.2577.910.0325444.14.24.14.24.24.2.1454.2.23.14.34.3.1[39]1a46bc.d.e.f.2a.b.c.d.Pt10003.1-2006304.3.24.3.2.147±0.5±0.5Pt1000Pt50Pt1004.3.2.2[40]Pt1000-200650-20004-3])(1[3020tRtCBtAtRRt-+++=4-306504-4)1(20BtAtRRt++=tR0RΩ=10000R31090802.3-