An Analytical Framework for Evaluating the Impact of Distribution-Level LVRT Response on Transmission System Security

Low voltage ride through (LVRT) is a solution to increase the tolerance of distributed energy resources (DERs) against sags. However, possibility DERs trip according present grid codes exists. Such trips do not have substantial local effect but are essential for transmission systems with connected DER-penetrated distribution networks (DPDNs). This paper investigates an analytical framework see impact distribution-level LVRT response on system security. stands total amount lost DER capacity due inability meet requirement during sag. generation loss in sector can expose network lines overloading after fault clearance. The proposed novel approach based source contingency analysis that lets operators (TSOs) conduct LVRT-oriented security assessment. In this kind assessment, mathematical function defined as DPDNs. gives transmission-level transient faults and constructed by (DSOs). TSO use these functions assess loading post-clearance conditions. framework, evaluated calculating risk under large number random faults. implemented two test power considerable penetration level obtain line networks.