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Challenges in the planning and operation of distribution networks caused bythe integration of distributed energy resources (DERs) create the need for thedevelopment of tools that can be easily used by system operators, industry, andthe research society but are also easily upgraded with new functionalities. Thefull implementation of one such open source tool, named pp OPF (pandapowerOptimal Power Flow), is presented in this paper. Pp OPF is the tool used forthree-phase optimal power flow (OPF) calculations and it is based on alreadyexisting functionalities of pandapower, a Python library for power systemcalculations. The developed tool enables the possibility to use bothpower-voltage and current-voltage formulation in different OPF problems, suchas determining the photovoltaics (PVs) hosting capacity in three-phasedistribution networks, the problem on which the functionality of the developedtool is tested. Additionally, the accuracy of pp OPF is verified by comparingthe results with ones obtained by pandapower power flow calculation for thesame set of input values. The open-source implementation allows furtherupgrades, the addition of new functionalities, and the creation of new casestudies relevant to the planning and operation of distribution networks.

Pp OPF -- Pandapower Implementation of Three-phase Optimal Power Flow Model