Optimal Voltage Sags Monitoring Considering Different Loading Profiles in Distribution Systems

Abstract

This research aims to assess the influence of different distribution systems loading profiles on the optimized placement process of Power Quality (PQ) monitors. Therefore it is presented a placement methodology that considers different loading profiles in the IEEE 34 nodes test feeder. The placement methodology is a branch and bound based algorithm which includes single phase short-circuits simulations with different fault resistances at each one of all considered loading profiles. An observability index is evaluated and introduced in the optimization process in order to prioritize monitors placement at the most sensitized nodes regarding voltage sags. Results reveal that the proposed placement methodology was able to provide feasible solutions, which contain the same placement nodes for all considered loading profiles. Thus, there are significant evidences that it is possible to properly carry out the optimal placement of PQ monitors, assuming the distribution system modeled and simulated without loads.