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Current grid codes require the fault ride-through capability of modern wind turbines. During grid faults the reactive current control of the wind turbines should be used to support the grid voltage. With modern protection devices the fault durations are normally in a range of some hundred milliseconds or less. However this time window may be decisive for the stability of the conventional generators...
Doubly-Fed Induction Generators (DFIGs) are commonly utilized in wind farms nowadays due to their advantages as compared with single fed ones. Control complexities and their unique dynamic characteristics may, however, raise different problems during abnormal or faulty operating conditions. Accordingly, the behavior of the associated protective elements at the Point of Common Coupling Point (PCC)...
This paper deals with the impact of large scale wind power integration on the transient stability performance of power systems. Typical offshore wind farm topologies including the medium and high voltage submarine cables, the generator, the multi-stage transformers, the controllers were simulated using real-world values. Voltage and power at the point of common coupling and the swing curves of conventional...
This paper deals with modeling of the doubly-fed induction generator (DFIG) and the corresponding converter for stability studies. To enable efficient computation, a reduced-order DFIG model is developed that restricts the calculation to the fundamental frequency component. However, the model enhancement introduced in this paper allows the consideration of the alternating components of the rotor current...
This paper surveys the impact of increasing level of wind generation on the performance indices of the interconnected system and what this entails in terms of improved control and protection schemes for wind turbines. After a brief review of the mathematical model of the doubly-fed induction generator (DFIG) and its control structure, simulation results are shown to quantify the effect of wind generation...
This paper explores the available control options for enabling wind power generation plants to participate on the maintenance of system frequency following a major power imbalance. Taking the currently employed control structures for wind generators as the baseline case, possible expansions and additional features have been discussed. The options include voltage or alternatively frequency dependent...
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