A Study on Meshed Distribution System and Protection Coordination Using HILS System

Most distribution networks are composed of radial distribution systems, but to solve problems, such as reliability, utilization rate, power loss, and hosting capacity of distributed generators (DGs), research has recently been conducted on introducing the mesh distribution system. Although the meshed distribution system has various advantages, it makes the structure of the distribution system and the protection coordination method more complicated by its complex structure and bi-direction power flow. Therefore, to solve this problem and promote the introduction of a mesh distribution network, this paper explains the need for hard-in-the-loop simulation (HILS) for real-time protection cooperative research.