Compilation of the FRT grid code in grid-connected power plant under unbalanced conditions

Abstract

The increasing development of distributed generation sources and the advancement of various technologies have led to great attention being paid to utilizing these sources with different capacities and voltage levels. Therefore, in recent years, the development of standards and requirements such as the Grid Code has received more attention in various countries. In addition to using the generations of these resources to provide the required activities, the ability of these resources to improve grid stability and reliability, especially the fault ride-through capabilities, should also be used. Engineers, legislators, and academics' primary focus has been developing grid codes with an emphasis on balanced conditions. However, more than 98% of the faults in the grid are unbalanced, especially single-phase faults. Therefore, in addition to a detailed study of the gaps in the grid codes of different countries covering unbalanced conditions, this study proposes an approach to develop grid codes under unbalanced conditions and, in particular single-phase faults in the IEEE sample system. Simulation results are evaluated under both balanced and unbalanced conditions for better validation