tiny
begin{equation}
label{modelo_mat}
begin{aligned}
& text{minimize}
&& sum_{i=1}^{N} (w_1DTT3_i+w_2DTTI_i+w_3a_i)\
& text{sujeito a:}
&& y_{fi}^h = frac{1}{dfrac{X_{Cfi}}{f_Q h_{si}}+jleft(dfrac{hX_{Cfi}}{h_{si}^2}-dfrac{X_{Cfi}}{h}right)} quad i = 1,2, ..., N quad h = 3,5,7,...  \
&&& textbf Y^h textbf V^h = textbf I^h quad h = 3,5,7,...,h_{max}\
&&& DTT3_i = frac{sqrt{sum_h V_i^{h^2}}}{U_i}times 100% , quad i = 1,2,...,N quad h = 3,9,15, ... \
&&& DTTI_i = frac{sqrt{sum_h V_i^{h^2}}}{U_i}times 100% , quad i = 1,2,...,N quad h = 5,7,11, ... \
&&& DTT3_i le overline{DTT3_i} quad i = 1,2,...,N \
&&& DTTI_i le overline{DTTI_i} quad i = 1,2,...,N \
&&& ubar{h}_{si} le h_{si} le bar{h}_{si} quad i = 1,2,...,N \
&&& a_i in {0,1} quad i = 1,2,...,N \
end{aligned}
end{equation}
normalsize