电力负荷管理终端及电能表一体化检测装置的研究

ElectricalMeasurement&Instrumentation46523200907Vol.46No.523Jul.20090、10kV、DMS、、“”、。、、、。。。、、、、、、。11.1、、6、6、2451。1,12(1.3300962.330006)。、、、PWM。PWMTM933B1001-1390200907-0045-04MeasuringDeviceforTerminalandMetersofDMSLIUShui1,NIEFang-ming1LIPing2(1.JiangxiElectricPowerResearchInstitute,Nanchang330096China.2.NanchangUniversityNanchang330006,China)Abstract:TheapplicationofterminalandmetersinDMSismoreandmorepopular,butnowthereisnointegraldevicewhichcangatherthefunctionofterminalmeterandothermeters.Thispaperwillintroduceadeviceutilizedbythemoderncommunicationtechnology,itcanimitatekindsoperatingstateofdistributionnetwork,andintegratesallthemeasuringfeaturesfortheinstrumentsincludingthedistributiontransformerterminal,networkedpowermeters,commercialcustomerterminals,andmulti-functionpowersmeters.TheemulationalsourceofthedeviceisarmedwiththedigitalPWMtechnology,whichreducestheweightandsizeofthedevicebutincreasestheefficiency.ThisdeviceisusedinJiangxiprovincesuccessfully.KeywordsdistributionnetworkWatt-hourmeter,digitalPWMtechnology45--ElectricalMeasurement&Instrumentation46523200907Vol.46No.523Jul.20091Fig.1Devicestructurediagram、。。6。6、、、。1.2、、、、、、、、。。DSP1234AD5。2。“”、。DSPPWM。PWM。1.3、、、、、、。。RS485DL/T645、、、。。RS485、、、、。CPU、10MHz、1×10-10/s2×10-6。、、、。3。41。=－)÷×100%26

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 DSPASRAMBEEPROMCPLDBDSPBPCADCPLDA46--ElectricalMeasurement&Instrumentation46523200907Vol.46No.523Jul.20091Tab.1Thepartmeasuringfeaturesforcommercialcustomerterminals。=－÷×100%3、GPS。=×－GPS÷GPS×100%48255485GPS“”、“”、“”。=－。1.4、。RS232、、、、、、、、、、、、、、、CT、CT、CT、、、、。22．11。3Fig.3Watt-hourmetermulti-purposetestingboarddiagramGPS
 
/!#$/!%/!4&’()*/!#$/!%/!DBDataBusControlBus+,-./0%123 48255567)* 1824%12347--ElectricalMeasurement&Instrumentation46523200907Vol.46No.523Jul.20094Fig.4Multi-functionwatt-hourmetercommunicationprotocolTestingDiagram2．2、、、、。。2．3、、。2．4RS485、“”、“”、“”。4。2．5PCRS485RS232。“”、“”、“”=(-)÷×100%2．6±0.1%。100kW120。24、、、247。PC4851~24、、、=(+++-)÷×100%2．7。1100%10ms20≥1s2100%10min2≥1s324h5min,。x(kWh)x(kWh)。xx=m×Un×Imax×10-6mUnImax。3Windows95,,,EXCEL、ACCESS。(OLE)。5。6548--ElectricalMeasurement&Instrumentation46523200907Vol.46No.523Jul.20094DSP、、、。GPRSRS232。、、、、、。[1]GB/T15148—94[S].[2]DL/T535-93,[S].1967-。Email:[e-mail]1982-。1962-。2009-02-20(THD)-93dB(0.0022%)。3:5Hz~38kHz:Vi=0.6Vrms1MΩ(60Hz)~1Ω(60Hz)~2Ω(1kHz)5nF4123430V567。15Hz1KHz。[1]P.Sankaran,P.kanagasabapathy,V.G.K.Murti,ElectronicError-Compe-nsationofaVoltageTransformers,IEEETrans.onInstrum.Meas.,vol.28,pp.86-88,No.1,March1979.[2]W.G.K.Ihlenfeld,ASimple,ReliableandHighlyStableAC-VoltageAmplifierforCalibrationPurposes,IEEETrans.onInstrum.Meas.,vol.54,pp.1964-1967,No.5,October2005.[3]G.Ramm,H.Moser,andA.Braun,ANewSchemeforGeneratingandMeasuringActive,ReactiveandApparentPoweratPowerFrequencieswithUncertaintiesof5ppm,CPEM1998,WashingtonDC,USA,ConferenceDigest,Inst.EEEInc,NewYork(1998),pp.283-284.[4]G.Ramm,H.Moser,andA.Braun,ANewSchemeforGeneratingActive,ReactiveandApparentPoweratPowerFrequencieswithUncertaintiesof2.5x10-6,IEEETrans.OnInstrum.Meas.,vol48,pp.422-426,Apr.1999.[5]W.G.K.Ihlenfeld,MaintenanceandTraceabilityofacVoltageRatiosandacPowerbySynchronousDigitalSynthesisandSampling,PTB,Braunschweig,Germany,ReportE-76,2001.1967-PTB。Email:[e-mail].G.KürtenIhlenfeld1960-1997、、PTB。2009-02-025Fig.5Thespectrumanddistortionoftheoutput4865--