Modelling and simulation of reverse power relay for loss of mains protection of distributed generation in microgrids

Integration of distributed generation (DG) into the utility grid has led to a renewed emphasis on looking into novel power system control and protection issues pertaining to DG units. This paper focuses on loss of mains (LOM) detection and protection for DG. Commonly used methods of detection fail to effectively detect the loss of mains scenario when the local area network load and generation are closely matched. The proposed method of detection and protection is highly efficient when the demand and supply are similar. For this reason it can be used together with the present methods to provide a complete solution to LOM protection.