Survey regarding additional indicators for voltage sags

Voltage dips represent a Power Quality disturbance with the most significant economical consequences. However, too few of their characteristic sizes are defined, such as voltage sags amplitude and frequency. A new series of characteristic sizes for the voltage sags are justified presented in this paper, forming together with the already known a complete indicators family, for this aspect of Power Quality disturbances. Also, here are analyzed and proposed the voltage sags main shapes, for their recognition and classification.