Discussion the Traceability of Quantity Value of Digital Watt-hour Meter

To resolve the traceability of quantity value and calibration of digital watt-hour meter, in this paper introduced working principium of digital electric power metering system briefly, and analyzed the main origin of error from the theory of digital watt-hour meter and its calibration device. This paper also proposed new verification method of digital watt-hour meter calibration device and project of digital watt-hour meter traceability of quantity value. The method is used in digital signal generator calibration. The traceability project is traceability to the national primary standard which is corresponding to the device using in the method. The project in this paper, which is figure out verification and traceability of quantity value from main origin of error, provides a reasonable approach to traceability of digital watt-hour meter and a useful reference to decriminalization of digital metrology. Meantime, the scheme provides strong technical support for construction of digital transformer substation and "Smart Strong Grid". (C) 2012 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Hainan University.