This standard contains mathematical expressions and procedures that must be implemented for correctly assessing uncertainty affecting measurements on power systems. The document relies on the instrumentation typically used, with particular focus on digital instrumentation, and addresses typical kinds of uncertainty sources. The theory reported in the Standard ISO/IEC Guide 98-3:2008 Uncertainty of measurement -- Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) and supplements is used as background for expressing the relationships to be used for the evaluation of the uncertainty in measurements on power systems. The guidelines developed in this document can be used to evaluate uncertainty budget when performing the measurement of a given quantity on electric power systems as well as to correctly write their value in official documents like specifications and test reports. This document contains a variety of examples to deeply discuss and explain the provided guidelines. The concepts presented can be extended to more general measurement uncertainty evaluation problems.
Working Group Chair: Lorenzo Peretto
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