earticle

영어

The microgrid systems play a vital role in reducing the impact of renewable generation effect on the main grid. Microgrid systems can achieve grid-tied operation and isolated operation modes with fast switching and isolation functions. The reliability of power supply can be further achieved through the microgrid by reforming a mesh configuration. However, the protection of the network is a challenging task due to the bi-directional power flow and the change of the network structure. In this paper, an adaptive -model and simulation of the solar photovoltaic microgrid differential current protection scheme -are presented. Differential scheme denotes a very credible method to secure the protection zone. The protection system that is under consideration behaves the most important part of the power system. Current protection relay scheme plays an important role in the protection of transmission lines, because it is sufficient and reliable. This paper discusses (dual slope) differential relay parameters of the system with various fault situation states. Therefore, the protection scheme must identify the fault zone for rapid separation to reduce the damage of equipment. Our simulation results show that the proposed method is effective and can reduce the percentage of errors.