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The incorporation of several hundred megawatts of wind generation will require modifications both of regulations and the operating procedures of the Uruguayan electrical system. It becomes necessary, therefore, to develop studies which allow understanding the behaviour of the electrical system once that generation is present. This paper aims to deepen and assist in the analysis of one of the key aspects for the incorporation of wind generation, its response to a voltage dip and how it affects the operation of the electrical system. To do so, a number of analysis methodologies were developed, which allow to evaluate both the behaviour of the electrical system as a whole, and the individual behaviour of each of the nodes where wind generation is planned to be connected, upon the occurrence of short circuits in the transmission network. In particular, an analysis methodology based on the vulnerability areas study has been developed and implemented. From its application on the Uruguayan electrical transmission system it is possible to determine, for example, the maximum number of wind farms expected disconnections due to a voltage dip over a year, as well as other statistical information of great interest. It is worth mentioning that although the Uruguayan electrical system has been taken as the application case for these study methodologies, they are applicable to any electrical system. [ABSTRACT FROM PUBLISHER]

This work aims the description, modeling and simulation of the incorporation of a power system stabilizer (PSS) in variable speed wind turbines in order to dampen oscillation in power grids. The proposed PSS aims to alter the nature of the electric power injected by the wind farms to, in some sense, mimic the oscillatory behavior of synchronous generators and allows dampening these transient oscillations. The main advantage of this stabilizing action lies in the fact that the wind turbines, by decoupling the electrical frequency of the network respect its rotational speed by the inclusion of power electronic converters, allows the injection of oscillating power without risk of suffering stability issues. This allows to improve the oscillation damping between different synchronous generators.The proposed PSS has been analyzed in a grid of three areas: an area comprises the infinite bus; the second one a synchronous generator and the third one contains a synchronous generator and a wind farm. The PSS takes as reference the active power injected by the synchronous generator of the third area using synchrophasors. Finally, it is studied the performance of the PSS for a particular case of the Uruguayan power grid. In this scenario, the second area is composed by the hydro power plant Baygorria; the third area is comprised by the hydro power plant Terra and the wind farms Palmatir and Agua Leguas; finally, the first area is the rest of the power system. 1 [ABSTRACT FROM PUBLISHER]

The purpose of this paper is to analyze the small signal stability of the Uruguayan power system on a short to medium term according to the scenarios for the years 2013–2017, in which the transmission network will undergo major changes: first, the inclusion of large quantities of wind power and secondly, the implementation of major infrastructure projects including the construction of the 500kV line from San Carlos - Melo 500kV and 150kV lines Artigas - Rivera and Tacuarembó - Melo of 150kV. In order to understand the global role that will play the integration of wind power in the small signal stability of power system, Uruguayan scenarios of maximum and minimum demand for the years 2013 and 2017 will be analyzed, considering and without considering the incorporation of wind power. [ABSTRACT FROM PUBLISHER]

This paper has two main objectives: to explain the dynamic characterization of wind farms as part of their integration in power systems using modal analysis and to present a qualitative development for understanding the main factors that impact on the damping of the oscillation modes by incorporating wind farms based on variable speed wind turbines. Moreover, such developments are validated by performing simulations on a 2017 peak scenario for the Uruguayan electrical system, showing a strong interaction between the hydroelectrics power plants located on the Río Negro and future wind farms Palmatir and Agua Leguas. [ABSTRACT FROM PUBLISHER]