Initialization of DFIG Wind Turbine for Electromagnetic Transients Simulation

Because of a large number of power electronics and control equipment in power grid, the zero-state initialization for the electromagnetic transient simulation takes a lot of simulation time, and even cause the simulation start-up failure. In order to solve the initialization problem of electromagnetic transient simulation of doubly fed induction generator (DFIG) wind turbine, an initialization calculation method based on power flow and control parameters was proposed in this paper. Based on the induction generator steady-state circuit and the relationship between the modulation voltage of the control system and the AC/DC voltage of the converter, the electrical components and control system were initialized separately in a modular way. The flat start-up of electromagnetic transient simulation of DFIG wind turbine was realized. It solved a series of initialization problems of traditional electromagnetic transient simulation software, such as long simulation start-up time, manual intervention and even start-up failure. Finally, the electromagnetic transient simulation program is developed in C ++ language and compared with the PSCAD/EMTDC simulation. The effectiveness and correctness of the proposed initialization method are proved.