D5.1. OPENTUNITY power flow developments (v1)

This document presents the design and first version of the OPENTUNITY modules providing services and technologies for grid operators.The summary and purpose of each of the modules is presented below: Topology identification tool:Aims to determine both the connections and line impedances, without knowledge of line infrastructure. Topology detection tool:The system operator knows the line infrastructure and their impedances and needs to determine the ones that are currently energized. Fuse burn detection tool for early outage and islanding recovery:In certain cases, the normal operation of a triphasic line gets disrupted when a fuse from one phase blows. The aim of the task is to detect the blown fuse through the monitoring of the voltage at end user level and the appropriate calculations. Enhanced state estimation tool:Aims to retrieve the unknown system state, that is, the complex voltages at all buses and connection points. Critical point detection tool:The aim of this tool is to detect critical points in a branch given the capacity limits of the different sections of cable in the same line. Short term analysis of the impact of DER in the Distribution grid:The aim of this tool is to study the voltage variations due to DER fluctuations that might impact the stability in the transient state. Real-Time Thermal Rating (RTTR) tool:The aim of this tool is to develop a Dynamic Line Rating algorithm based on weather condition estimation. The modules presented will be integrated to the Advanced Distribution Management System (ADMS) developed by ETRA called ÉTER. Each module is described in detail, focusing on design, implementation, and preliminary mock-ups. Finally, the conclusion of the development performed and the next steps are explained in the “Conclusions” section.