An electric power system model analysis device for creating a contraction analysis model of an electric power system, comprising: a fault condition setting section configured to set a fault condition including a location or an aspect of a fault in the electric power system; and a natural energy contracted spot determination section configured to determine whether to permit contraction of the electric power system including natural energy power supplies on the basis of the fault condition and a voltage state during the fault, characterized in that the natural energy contracted spot determination section is further configured to determine that the contraction is prohibited if one of the natural energy power supplies prohibited from being contracted is present within a predetermined range of at least one partial system of the electric power system, and to determine that the contraction is permitted if the natural energy power supply prohibited from being contracted is not present within the predetermined range of the electric power system, wherein the natural energy contracted spot determination section is further configured to determine whether to permit continuation of operation of the natural energy power supplies during or after the fault on the basis of the fault condition, the voltage state during the fault, and characteristics information about each of the natural energy power supplies, and to determine whether to permit the contraction on the basis of whether to permit the continuation of operation, wherein the natural energy contracted spot determination section is further configured to determine whether to permit the contraction on the basis of duration time of a voltage drop of the natural energy power supply or recovery time of voltage output during or after the fault, wherein the electric power system model analysis device further comprises a natural energy contraction data creation section configured to calculate a system configuration and predetermined parameters after the contraction for the range of a partial system within which it is determined to permit the contraction, and to create contraction data, wherein the natural energy contraction data creation section is configured to create the contraction data on the basis of preset criteria, and the criteria include a generator capacity, a line impedance, or a fault ride through characteristics pattern, wherein the natural energy power supplies are wind turbines. a fault condition setting section configured to set a fault condition including a location or an aspect of a fault in the electric power system; and a natural energy contracted spot determination section configured to determine whether to permit contraction of the electric power system including natural energy power supplies on the basis of the fault condition and a voltage state during the fault, characterized in that the natural energy contracted spot determination section is further configured to determine that the contraction is prohibited if one of the natural energy power supplies prohibited from being contracted is present within a predetermined range of at least one partial system of the electric power system, and to determine that the contraction is permitted if the natural energy power supply prohibited from being contracted is not present within the predetermined range of the electric power system, wherein the natural energy contracted spot determination section is further configured to determine whether to permit continuation of operation of the natural energy power supplies during or after the fault on the basis of the fault condition, the voltage state during the fault, and characteristics information about each of the natural energy power supplies, and to determine whether to permit the contraction on the basis of whether to permit the continuation of operation, wherein the natural energy contracted spot determination section is further configured to determine whether to permit the contraction on the basis of duration time of a voltage drop of the natural energy power supply or recovery time of voltage output during or after the fault, wherein the electric power system model analysis device further comprises a natural energy contraction data creation section configured to calculate a system configuration and predetermined parameters after the contraction for the range of a partial system within which it is determined to permit the contraction, and to create contraction data, wherein the natural energy contraction data creation section is configured to create the contraction data on the basis of preset criteria, and the criteria include a generator capacity, a line impedance, or a fault ride through characteristics pattern, wherein the natural energy power supplies are wind turbines.