Abstract: This catenary based transportation system is equipped with an integrated power supply facility comprising an electric storage unit for storing electricity regenerated by vehicles traveling on electricity received from a catenary and for supplying electricity to the catenary and another power supply system that serves as a power supply system different from the electric storage unit. The performance of a rectifier of the other power supply system is determined on the basis of the power supplying contribution ratio (?) of the other power supply system such that the cost value of the integrated power supply facility becomes less than a target cost value.