Digital substations primary equipments make use of many intelligent primary equipment, for example, Electronic Transformers (including Electronic Voltage Transformers EVT and Electronic Current Transformers ECT,which meet the standards IEC 60044-7/8),intelligent switch and so on,digital substations secondary equipments include many IED(Intelligent Electronic Device). This thesis studys on the function,design,hardware and testing method of the testing system for real-time of communication of the digital substations secondary equipments.
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