Long term dynamic simulation for power system including wind farms

The increasing capacities of wind power bring influence on power system stability because wind power can produce stochastic behaviors due to special fluctuant characteristics of natural wind. The dynamic simulation method and software considering effect of wind power mainly concentrated on electromagnetic transient and electromechanic transient process, whereas the analysis for the long term dynamic simulation for power system including wind farms is relatively scarce at present. This paper adopts mathematic dynamic model of induction wind generating set and double-fed induction generators respectively, and makes use of dynamic simulation method based on variables grouping and seceding grouping strategy, realizes long term dynamic simulation for power system including wind farms under different wind condition and operating mode based on a modified IEEE-30 bus network. The numerical example shows that dynamic simulation method being adopted is suitable for long term dynamic simulation of power system including wind farms, and also shows that doubly fed induction wind turbines have better stability characteristic than asynchronous induction wind turbines and can improve system stability characteristic.