  We studied the centrality selection effect on cumulants (up to fourth order)
and the cumulants ratios of net-proton multiplicity distributions in Au+Au
collisions at $\sqrt{s_{\mathrm{NN}}}$ = 7.7, 19.6 and 200 GeV from UrQMD
model. The net-proton cumulants are calculated with collision centralities by
using charged particle multiplicity from different pesudorapidity ($\eta$)
region. By comparing the results from various collision centralities, we found
that the autocorrelation effects are not significant in the results with
collision centralities "refmult-3" and "refmult-2", which are using
mid-rapidity charged particles but excluding (anti-)protons and analysis
region, respectively. Furthermore, due to the contributions of spectator
protons, we observed poor centrality resolution when using charged particles at
forward $\eta$ region at low energies. This work can serve as a baseline for
centrality selection of future fluctuations analysis in relativistic heavy-ion
collisions.
