Uncertainty evaluation in the measurements for the electric power quality analysis

The paper deals with the uncertainty estimation in the measurements performed to assess the electric power quality. In a first steps, according to the “ISO - Guide to Expression of the Uncertainty in Measurements” all the error sources, which give a significant contribution to the combined uncertainty associated to the measurement results, are identified. Successively, in order to analyze how the errors propagate through the measurement chain, a Monte Carlo based approach is proposed. The method exploits an ad-hoc developed simulator of the measurement process, which takes into account the particular way of propagation of all the identified error sources. Eventually, with the aim of validate the proposed approach, the results of a series of experimental tests are presented.