Additional indicators for short time overvoltages and voltage impulses

The short time overvoltages and the voltage impulses represent Power Quality disturbances, with significant economic consequences, both for end-users and for suppliers also. Currently, there are defined too few sizes characteristic of these ones, insufficient for a correct assessment of their consequences. A new series of characteristic sizes both for short time overvoltages and voltage impulses are proposed in this paper. The scientific basis for defining the new indicators is represented by the electrical insulation stresses, caused by both analyzed perturbations types. The association between the known indicators and the new defined ones leads to the disposition of a complete indicators family for these two aspects of the Power Quality.