Comparative Research between Several Lightweight CNN Models for Non-intrusive Load Monitoring Using Transfer Learning Approach

V-I trajectory is widely used as load signatures in non-intrusive load monitoring (NILM) problems. This paper proposes a simple but efficient method to obtain RGB V-I trajectory, using the time derivatives of instantaneous reactive current and voltage to map gray V-I trajectory to RGB space. With two kinds of V-I trajectory as load signatures, i.e., the greyscale and the RGB respectively, comparat...