ABOUT THE ACCURACY OF SOME PROPOSED PROCEDURES FOR REVENUE METERING UNDER NONSINUSOIDAL UNBALANCED CONDITIONS

in order to discourage the insertion of polluting loads, suitable tari ff policies should be adopted. A possible strategy is based on the com parison between the total active power and the active power at fundame ntal frequency and positive sequence. Digital Signal Processing techni ques allow for the implementation of revenue meters able to measure bo th those quantities and any index based on them. This paper analyses t he accuracy that can be expected in the measurement of both the ratio and the difference of the above powers. The results of numerical simul ations confirm that the ratio measurement is suitable for revenue purp oses even when the total and fundamental active powers differ for part s per thousands.