The utility model provides a wind power plant modeling simulation system based on a real time digital simulator (RTDS). The wind power plant modeling simulation system based on the RTDS comprises an RTDS power grid simulation device, an RTDS wind power plant simulation device and a double-fed draught fan converter, wherein the RTDS power grid simulation device is used for simulating a power grid. The RTDS power grid simulation device and the double-fed draught fan converter are respectively connected with the RTDS wind power plant simulation device which is used for simulating a wind power plant and carrying out a technological performance test on the double-fed draught fan converter through the cooperation with the RTDS power grid simulation device. The technological effects that the system can simulate a static operation character of the wind power plant and a dynamic interaction process between the wind power plant and the power grid under the condition of stoppage, a power grid operating accident can recur, and a performance test can be carried out on the double-fed draught fan to analyze an accident occurrence mechanism are achieved.