The effect of different control modes and mixed types of DG on the non-detection zones of islanding detection

Loss of mains protection (LOM) is among the most challenging issues related to the integration of distributed generation (DG). This paper presents simulation studies on the effect of multiple DG units on LOM protection. The results reveal an operational risk related to the active LOM detection methods. The effect of voltage droop control of the DG on the form of the NDZ is also studied.