Optimal Voltage Sags Monitoring Considering Different Loading Profiles in Distribution Systems

Abstract

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.

Optimal monitoring of voltage sags through simultaneous analysis of short‐circuits in distribution systems

“…All results presented in this paper are related to solid faults. To investigate the influence of the fault resistance and system load in the present methodology, in [16] resistance faults varied from 0 to 40 Ω at all nodes of the DS, where four different levels of loading were also considered. The results lead to the conclusion that the allocation points were adequate to SLGF, even when resistance and load were changed, thus, providing appropriate and broad monitoring for voltage sags.…”