In this article, we investigate the local and nonlocal failure propagation patterns in power systems propose effective mitigation strategies. It is widely acknowledged that sequence of events component overloading determined by flow redistribution. To understand redistribution process, analyze prefault condition using network theory clustering system into several regions with balanced flow. We observe faults triggering imbalance would lead to remote transfer causing no The improved...

This paper studies cascading failure propagation in power systems and presents methods for the quantification of important properties propagation. First, topological are examined. includes an analysis electrical distance between consecutive failures, shedding light on spatial spread failures. Additionally, formation islands processes is explored to understand their characteristics. Second, measures evolution a system during processes, considering both changes overall rates loss. provides...

This study proposes a cascading failure model for power systems that addresses event-triggered flow divergence. After event, voltage instability is major cause of To detect events, we track the steady-state profiles across successive cascade generations by adopting continuation (CPF). Various events are incorporated into CPF computation. Hence, proposed can identify monitoring emergence buses hit saddle-node bifurcation (SNB) point. In this way, able to derive equilibrium points, if they...

Some components in a power system are more vulnerable than others. Limited by the capability of existing quasi-steady-state (QSS) models cascading failures, previous analysis on typically omits influence voltage collapse. In this paper, we identify nodes that most susceptible to collapse failures with QSS model applies practical measures response collapse, i.e., undervoltage load shedding (UVLS) and protection relays. The proposed is based continuation flow (CPF). We apply IEEE 118-bus...

In this paper, we investigate the influence of locations inverter-based resources (IBRs) on synchronization performance power networks. We propose two indexes to measure distribution inertia in networks, considering control parameters and topological factors jointly. The first index is clustering coefficient, which measures how densely neighbors each node are connected a network. second centrality captures whether network centralized or peripheral. characterize synchronous generators (SGs),...

In this study, we evaluate the impact of frequency control and penetration inverter-based resources (IBRs) on cascading failures in power systems. The modeling controllers for IBRs requires obtaining realistic state information during failure processes. However, events can alter system topologies flow Jacobian, leading to unsolvable even when an equilibrium point exists. To address this, propose a model that tracks steady-state voltage profiles across successive cascade generations. This...