Abstract
As a result of the increasing wind power penetration into power systems, the wind farms, especially with doubly fed induction generators, are required to have the fault ride-through capability. The article presents a study on the influence of three different feed-forward voltage compensation terms in rotor current control on the fault ride-through capability of doubly fed induction generator wind turbines. The study focuses on the enhancement of fault ride-through capability for doubly fed induction generator wind turbines by adopting different feed-forward voltage compensation terms in rotor current control. The three control strategies, which are developed based on different feed-forward voltage compensation terms, are evaluated through simulations of doubly fed induction generator wind turbines under both normal conditions and grid voltage fault conditions. The three control methods present different performances. Under normal conditions, the control system 1 presents better performance. However, the control system 3 presents better performance when the doubly fed induction generator wind turbine is subjected to a voltage fault. In order not to have the influence on the performance under normal operating conditions, the added feed-forward voltage compensation terms in the control system 3, which acted as a fault control mode, are enabled only when a voltage fault occurs in the grid.
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