Study On Key Technology Of On-line Monitoring Of MOA In Intelligent Substation

On-line monitoring technology is become more and more important with theconstruction and reform of intelligent substation, which is the vital base ofaccomplishing integrated automation of intelligent substations, so it is need to takeintensive study necessarily. The Topic take advantage of the advanced computer andmicroprocessor technology, communication technology, digital signal processingtechnology, and as well as modern electronics technology to conducting an intensivestudy on key technology of on-line monitoring of MOA in intelligent substation, torealize the real-time on-line monitoring of MOA in substation, and laying solidfoundation for intelligent building and transform of substation. Based on the systemstructure of intelligent substation, the topic designs the general structure of the on-linemonitoring system of MOA:Firstly, the topic analyzing the characteristics of the valve plate of MOA. Takeintensive study of variety kinds of on-line monitoring methods at home and abroad, atlast, design the own method of on-line monitoring. By which both the impedancecomponent of MOA’s leakage current and statistics the number of lightning shock thatMOA bear can be collected. Analyze factors that influent the accuracy of on-linemonitoring of MOA and study corresponding solution to wipe off the influences.Secondly, the topic designs the on-line monitoring system of MOA according tointelligent substation’ system structure detailed, which as the sequence of processlevel, spacer level, and station level. In process level, mainly design on-linemonitoring terminal of MOA in both hardware and software, Apply these keytechnologies such as: the whole cycle sampling scheme, IRIG-B code synchronousclock scheme, sensor own angle difference compensation scheme, etc to design. Inspacer level, the new intelligent electronic equipment (IED (intelligent electronicdevice)) is designed integrated. In order to make it meet the requirement of intelligentsubstation. The key technology of on-line monitoring of MOA in intelligent substationstudied by the topic design an on-line monitoring IED of MOA which is faced on therealizing of the whole function of substation on obey the standard of IEC61850 communication net and system protocol. The IED use the double CPU structure,which is make of DSP and ARM, improve the management ability and dataprocessing speed are all be improved. In station level, real-time judge operationalstates of MOA and realizes forecasting warning function for MOA’s operationtroubles through comprehensive treatment and deeply analyzed to data updated bymonitoring terminals using experts software.Thirdly, comprehensive verify the MOA on-line monitoring key technologystudied by two field operation instances, and modify the shortage as well as analysisand study further.Totally, the topic study deeply in key technology of on-line monitoring of MOAin substation, and apply it in actual design. The topic make MOA on-line monitoringhave more significance, which increase on-line system’s reliability and stability aswell as validity and necessity, and offer basic guarantee for substation automationalso.