LS-SVM-based on-load tap changer control for distribution networks with rooftop PV´s

This paper discusses voltage regulation using on-load tap changers (OLTC) with line drop compensation (LDC) on low-voltage distribution networks with a high penetration of photovoltaic generation (PV). Load flow simulations show that PV generators affect the performance of classical LDC in a negative way. However, when a database exists where voltages measured by smart-meters are stored, Least-Squares support vector machines (LS-SVM) can be used to estimate the maximum and minimum voltage in the system, without needing a grid model, nor real-time communication. Control of the OLTC can then be executed to widen the gap between the system voltage and the acceptable limits, based on the maximum and minimum system voltage estimates.