Comparison of Control Methods Approaches in Microgrid Architectures

Abstract

A microgrid is a power grid consists of distributed power generation units and loads. Microgrid is also a system that can operate in grid-connected mode and islanding (autonomous) mode. The control of distributed power generation units in microgrids is necessary for reliability and continuity of power grid. In this study, control methods applied for microgrid architectures previously were examined. Advantages and disadvantages of microgrid control methods were compared in tabulated form. These comparisons were evaluated for each control system by considering the conditions such as robustness, response rate of the system against parameter changes, stability of the system, elimination of harmonics in the system and having a nonlinear structure of the system. When determining the most suitable control method that can be applied to a microgrid system, it is necessary to consider the performance of the controller in unbalanced systems, sensitivity to parameter change in the system, switching problems, and response time of the system. As a result of this evaluation, it is concluded that controller design is an important phenomena if the location of the microgrid and the system parts to which it is connected have been taken into account.