Optimal Voltage Control in Power Distribution Networks Using an Adaptive On-Load Tap Changer Transformers Techniques

The assurance of a high quality of the voltage that supplies consumers is a first-degree demand for an optimal operation of the public electricity distribution networks (EDNs), being a permanent concern, both for Distribution Network Operators (DNOs) and the final consumers. The paper proposes a new optimal voltage control (OVC) approach in EDN using a hybrid line-drop compensation method based on adaptive On-Load Tap Changer (OLTC) Transformers techniques. The OVC problem is split into two separate subproblem which are simultaneously solved. Thus, the paper newness is the automatic OLTC control technique, which must to maintain the optimal operation voltage value in a “controlled” point considering two parameters: the so-called fictitious voltage and the corresponding imaginary impedance. A particular MATLAB code was applied taking into account the voltage quality parameter for a real medium voltage EDN. The results confirm the robustness of the proposed approach both for OVC through OLTC optimization.