An integrated probabilistic harmonic index

Both amplitude and argument of voltage harmonics can affect the electrical component behavior. In the paper an integrated index taking into account both of them is proposed for inclusion in harmonic standards. This index, which refers to the well known peak value of distorted voltage, allows taking into account the main effect of distorted voltages on component life. The time varying nature of harmonics is also considered and, coherently, limits to be assigned to this index are proposed also in probabilistic scenarios.