基于ATT7022A电能计量芯片的电力监控终端设计-陈涛

:TN79+1:A:1009-2552(2006)09-0040-04ATT7022A陈涛,张春杰,张文旭(,150001):高压电力传输线路的监视控制故障检测故障定位对于保证电网的安全运行有着重要的意义采用高精度三相电能专用计量芯片ATT7022A和低功耗强抗干扰的STC89C516RD+单片机,开发高压电力线路监控终端硬件系统,可以完成电力参数及时准确地检测和报警同时系统具有灵活的远程软件校表功能现场运行表明,系统稳定可靠,具有较高的实用价值:ATT7022A;;;STC89C516RD+DesignofterminalSCADAsystemofelectricpowerbasedonenergymeteringICATT7022ACHENTao,ZHANGChun-jie,ZHANGWen-xu(SchoolofInformationandCommunicationEngineering,HarbinEngineeringUniversity,Harbin150001,China)Abstract:SCADA,faultdetectionandfaultlocationofhighvoltageelectricpowertransmissioncanguaranteeelectricpowernetworkrunningsafely.Itisproposedinthispaperthatusinghighprecisionthree-phaseenergymeteringICATT7022Aandlowpower,highanti-jammingMCUSTC89C516RD+designterminalSCADAhardwaresystemofelectricpower.Thissystemcandetectelectricpowerparametersandalarmintimeandexactly.Andthisdesignhasanadvantagethatisagileandremotesoftwareregulatingmeter.Thefieldexper-imentshaveprovedthissystemcanworkstablyandreliablyandhashighpracticalvalue.Keywords:ATT7022A;softwareregulatingmeter;SCADAofelectricpower;STC89C516RD+,,,,,SCADA(Superv-isoryControlAndDataAcquisition),,,,,,,,,,,,,,ATT7022ASTC89C516RD+,,1电能计量芯片ATT7022AATT7022A,0.2sATT7022A,,AT7022A,,:2006-03-10:(1974-),,,,)40)ATT7022A1,ATT7022Asigma-deltaADCATT7022A,ATT7022ACF1,CF2,,ATT7022ASPI,MCU1ATT7022A2交流采样原理,,:U=1TQT0u2(t)dtTN,,UU1TENm=1u2m$Tm,N=T$T+1,:UU1N-1ENm=1u2m,:IU1N-1ENm=1i2m:P=1TQT0P(t)dt=U#I#cos5U1N-1ENm=1u(m)#i(m)5,ATT7022A21,21:Q=U#I#sin5U1N-1ENm=1uq(m)#i(m),uq(t)=u(t)90b,90S=P2+Q2ATT7022A:PF=sign(Q)@abs(P)abs(S),ATT7022A22ATT7022A)41)3硬件设计3,,ATT7022A,,,SPI33.1ATT7022A616ADC-,0.001V0.8V0.1%1.5V,1V-40%+30%,,,Vu=0.5V,8,Ib,Vi=0.1V,1.5mA,66.78ATT7022A44ATT7022A4RC,,-20dBP,ADC()3.2MCUMCUSTC89C516RD+,STC:(1)ESD,(2),4mA~7mA(3),IPOVCCGND,(4)(WDI)(5)80M,6T;,,(6)64KFlash,1280RAMFM24C6464KbitsFRAM,1012,FM24C64,,PCF8563PHILIPSI2CP,PCF8563FM24C64I2C,,PCF85630xA3;0xA2FM24C640xA1,0xA0X50454KSPIEEPROM,)42),X5045STC89C516RD+X25045RESET,X5045ATT7022A,,SPII2CSTC89C516RD+RS-485RS-232SipexESDSP485SP232,,AgilentHCPL-M456,,2400bPs,4800bPs,9600bPs,3.3RC,,ATT7022AP3,0x01~0x3F,ATT7022A,,,,AT7022cos5=1,Iregchg()0,IIrechgIIrechgIIrechgPgain0;IIrechgPgain1Iregchg0,,100%Ib,Pgain0Pgain1err,Pgain=-err1+errPgain\0,Pgain=INT[Pgain@223];Pgain0,Pgain=INT[224+Pgain@223]INT,errerr=ATT7022A-@100%Pgain=PrPPc-1Pr;PcPgain=0,ATT7022A3.4ATT7022AATT7022AHFConst:HFConst=INT5760000000@G@G@Vu@ViUn@Ib@NN=3200impPkWh,ATT7022ADC,G0.648100V,5A;100V,50AATT7022A,100V,1.5A,ATT7022AVu=0.5V,Vi=0.1VHFConst:HFConst=25=0x194结束语,ATT7022A;;;;,;;,;,6kV,,,,,:[1].[J].,2005,42(7):30-32.[2],.FPGA[J].,2004(10):59-62.[3],.[J].:,2004,41():239-242.[4].[J].,2005,21(3):241-243.:张荣香)43)