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Nowadays, the promotion of flexibility in power systems is crucial to integrate non-manageable Renewable Energy Sources into the grid, mainly due to both variability and uncertainty issues. A wide range of strategies are currently available to provide suitable alternatives depending on the characteristics of each solution. According to previous contributions, these solutions can be classified into:...
Reactive power must be measured and watched to verify accomplishment of Spanish grid code requirements in wind farms. However, no definition of reactive power is established in that code. Thus, two reactive power formulations are compared in this paper applied to wind farm generators in presence of transient disturbances such as voltage dips. First reactive power formulation is based on Emanuel's...
Reactive powers and currents supplied by wind generators are studied in this paper to verify new Spanish grid code requirements. Two approaches are used for that study. One approach is based on the well known Emanuel's theory included in the IEEE Standard 1459-2000. Reactive powers and currents are expressed by Emanuel for the fundamental-frequency, positive-sequence voltages and currents. Second...
Connection of wind farms to the electric network is submitted to some grid codes, which establish wind farm working conditions in presence of some transient phenomena, such as voltage dips. In this paper, Spanish grid code is used to evaluate effects of voltage dips on wind farms working. Reactive powers and currents must be watched at wind generators submitted to voltage dips, thus reactive phenomena...
The purpose of this paper is to describe and assess a new characterization and classification method of voltage dips. The proposed method allows us to classify multistage and real voltage dips when measurement errors or transients are present in the recorded data. Different real voltage dips are used to assess this method, comparing the results with previous approaches. For visualization purposes,...
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