智能高压开关柜在线监测系统的分析与开发

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1、对性地提出系统的机箱、线缆屏蔽方法、弱电信号走线布局以及监测单元的软、硬件抗干扰措施，使系统的运行安全、可靠。通过对系统的运行调试，证明所设计的方案有效可行。整个监测系统的电流测量量程1200A，精度0.2级以上，重复性极差百分比在3.5000以内。系统能够实现智能高压开关柜的计量、保护等功能，每通道采样速率达到10kS/s，对短路和电流过冲的跳闸保护能在10毫秒内完成。完全能够满足智能高压开关柜的应用需求。关键词：智能高压开关柜，监测系统，磁传感阵列，微机测量与保护，电磁兼容IIRESEARCHANDDEVELOPMENTOFONLINEMONITORSYSTE

2、MFORSMARTHIGH-VOLTAGESWITCHCABINETABSTRACTIntelligentHigh-voltageSwitchCabinetscomposeasignificantpartofSmartPowerGridastheyoftenassumeasthecontrollingandprotectingdevicesinelectricalpowersupplysystem.Thetraditionalswitchcabinetshavedisadvantagesintheirtoomuchsimplefunction,people-act

3、edinspectionandmaintainingcost.TheyareespeciallylagbehindincurrentmeasuringbecausetheTraditionalCurrentTransformerhaslowmeasuringaccuracyandnarrowfrequencyband.Therefore,anewonlinemonitoringsystemisrequiredtomeetthedemandsofmodernSmartPowerGrid.Theresearchanddevelopmentofthisonlinemon

4、itoringsystemwillserveasanimportantexplorationinthisfield.Primarily,atheoreticalresearchhasbeenconductedincurrentmeasuringforIntelligentHigh-voltageSwitchCabinets’application,soasacreativemeasuringmethodbasedonmagneticsensorsarrayhasbeenproposed.Aparallelarraytopologywasdesignedandthe

5、relatedmathematicmodelwasobtained.Throughtheresultsofexperiments,twoconclusionscanbeobtained.(1)Themeasuringaccuracyreached0.1F.Sinamplitudeand000inphase,andthismethodboastsexcellentperformanceinrepeatability(2)Theoptimizingtopologyforsensorarrayis,b=150mm.Secondly,theonlinemonitoring

6、systemhasbeenrealized,whichincludingthefollowingcontents.(1)Inregardoftheoverallstructure,themonitoringsystememployedanobject-orienteddistributedmonitoringstructuresoastoobtainhigherperformanceinreal-timingandreliability.(2)Inregardofhardwaredesign,adoubleCPUstructurebasedonDoublePort

7、RAMhasbeenproposed,andcorrespondingly,thehardwaresystemwasbeendividedintotheAnalogInputProcessingModule,theMonitoringandProtectingSinglechipModule,theMainControllingSinglechipModuleandthePowerSupplyModule.EachonewasinIIIchargeofseveralindependentfunctions,andthewholecostisverylow.(3)T

8、heres