to find the location of a variable appearing in workspace but not seen any where in "power_thr​ee_phase_m​atrix_conv​erter" model

in this "power_three_phase_matrix_converter" simulink model a variable "Ts" is assigned a value of(2*10-6) some where in the model.and is being used everywhere, but i am not able to find where it is defined.please show me where it is defined or initialized