Choice of state estimation solution process for medium voltage distribution systems

Abstract

Abstract--As distribution networks are turning into active systems, enhanced observability and continuous monitoring becomes essential for effective management and control. The state estimation (SE) tool is therefore now considered as the core component in future distribution management systems. The development of a novel distribution system SE tool is required to accommodate small to very large networks, operable with limited real time measurements and able to execute the computation of large volumes of data in a limited time frame. In this context, the paper investigates the computation time and voltage estimation qualities of three different SE optimization solution methods in order to evaluate their effectiveness as potential distribution SE candidate solutions.

Contributions to distribution systems state estimation =

“…Some approaches use the traditional modeling adopting the magnitude of the voltages and angles as state variables. The traditional approach is adequate to be applied in distribution systems as it is statistically consistent (NUSRAT et al, 2014). However, the resulting Jacobian matrix is a function of the state variables and, therefore, must be updated each iteration.…”