RT Journal Article
T1 Optimal coordination of directional overcurrent protections considering the occurrence probability of different configurations and the effect of grouping cases
A1 Sorrentino, Elmer
A1 RodrÃguez, JosÃ© Vicente
AB This article shows the optimal coordination of directional overcurrent protections considering the occurrence probability of different system configurations and the effect of grouping cases. The optimization is formulated for specific subgroups of topologies to find the optimal Bundle of Protection Settings (BPS) for each subgroup. The number of BPS is limited by the available setting groups in the relays. The objective function is the average of main protection tripping times, taking the occurrence probability of each topology as weighting factor. A slowness index sigma of each subgroup solution, regarding the optimal solution of a topology of reference, is computed. If sigma is greater than a given threshold sigma0, some topologies must be taken off the subgroup until obtaining sigma less than sigma0. Thus, the computed settings are optimal for that subset of configurations, without an inadmissible increment of delays for main protections. The most probable topology should be in the first subgroup, and the process is repeated for the next subgroups until covering the total number of topologies. Some topologies could remain out of the solved optimization problems if the number of available BPS is low, and the trade-off between selectivity and speed should be solved for them. Numerical results for an example are shown, as an efficient way to explain the analyzed problems and solutions.
PB Elsevier
SN 0378-7796
YR 2023
FD 2023-05
LK https://hdl.handle.net/10016/39660
UL https://hdl.handle.net/10016/39660
LA eng
DS e-Archivo
RD 7 ago. 2024