Índices de calidad del suministro eléctrico para sistemas multiterminales HVDC en topologías radiales y anilladas

Abstract

 In this paper an energy quality index that considers time-varing  disturbances, as sags and voltage harmonics, in transmission  systems interconnected with wind farms is presented. The  disturbances have been estensively studied in distribution  system which has helped to stablish the maximun permisible  levels to avoid damage to the equipment conected. On  transmission systems there is a growing interest in the energy  quality due to the presence of distributed generation as wind  farms. Although so far there is no a specific studio that indicate  power quality Index for a transmission systems levels. There  are several parameters which must be taken into account,  such as the magnitude and frequency of a disturbance, in  order to evaluate the power quality. These parameters are  obtained directly by the meters developed for this purpose.  By a statistical analysis of the disturbances characteristics,  these are evaluated and classified into three levels (A1, A2, A3)  depending on the signal quality measured at any particular  section. Also it is established a Short and Long Term Index  allowing a complete evaluation of the quality of the system.  The proposed Index are applied to several case studies which  demonstrate the performance of the index proposed here.