In this brief, by considering realistic network operational settings, we propose a novel model to investigate the cascading failures in interdependent power grids and communication networks. We perform critical node analysis on single networks identify vital nodes from perspective of robustness. Moreover, assess robustness an system composed Internet AS-level IEEE 118 Bus. Our simulation results show that assortative coupling destructiveness is more robust for densely coupled networks,...

In this paper, we study the robustness assessment of power systems from a network perspective. Based on Kirchhoff's laws and properties elements, combining with complex structure, propose model that generates flow information given electricity consumption generation information. It has been widely known large scale blackouts are result series cascading failures triggered by malfunctioning specific critical components. Power could be more robust if there were fewer such components or...

In this brief, we propose a stochastic model based on state transition theory to investigate the dynamics of cascading failures in communication networks. We describe failure events nodes network as node transitions. Taking probabilistic perspective, focus two uncertain conditions propagation process: which will fail next and how long it last before takes place. The gives each overloaded element probability failing, rate is relevant degree overloading. Moreover, time dimension considered...

With the increasing popularity of blockchain technology, it has also become a hotbed various cybercrimes. As traditional way scam, phishing scam new means in scenario and swindles lot money from users. In order to create safe environment for investors, an efficient method detection is urgently needed. this paper, we propose three steps framework detect scams on Ethereum by mining transaction records. First, obtain labeled accounts corresponding records two authorized websites. According...

In this paper, we use a circuit-based power flow model to study the cascading failure propagation process, and combine it with stochastic describe uncertain time instants, producing that gives complete dynamic profile of beginning from dysfunctioned component developing eventually large-scale blackout. The sequence failures is determined by voltage current stresses individual elements, which are governed deterministic circuit equations, while durations between described processes. processes...

In this paper, we propose a model to investigate the cascading failures in coupled system (smart grid) that comprises power grid and coupling cyber network. model, take into consideration effects of overloading, contagion, interdependence between grids networks on failure propagations system, then use stochastic method generate time intervals failures, thus producing dynamic profile caused by attack malwares. We study several systems generated UIUC 150 Bus System with different structures...

This paper studies the dynamic behaviors of weak-grid-tied VSCs with simplified transfer functions, which provides an accurate stability analysis and useful indications for tuning system parameters. A reduced-order multi-input multi-output (MIMO) function that contains four single-input single-output (SISO) functions VSC is first presented. It found SISO share same equivalent open-loop function, i.e., conclusion. The Bode plots show inner current loop behaves as a band-pass filter whose...

The penetration of power electronics into generation and distribution systems has deepened in recent years, as prompted by the increasing use renewable sources, quest for higher performance control conversion, well influence economic plans that necessitate trading among different regions or clusters distribution. As a result increased controlling flows systems, interactions conventional synchronous machines' dynamics would inevitably cause stability robustness concerns, which can be readily...

The structural efficiency of stiffened panels can be significantly improved by utilizing curvilinear stiffeners because their outstanding design flexibility. However, the explosion variables poses a stiff challenge to layouts such structures. In this study, novel layout optimization method is proposed for curvilinearly based on deep learning-based models, which enables intelligent design. Unlike traditional methods, image-based layout, characteristic stiffener paths, employed as variable,...

In this paper, we incorporate the dynamical process of frequency control in modeling cascading failure and assessing robustness power systems with a high level penetration renewable energy sources. Triggered by an initial failure, system may be decomposed into multiple subnetworks, where imbalance between generation load can induced. Frequency functions including primary, secondary, emergency are employed to reduce deviation balance generated consumed power. our simulation model, flow...

In this brief, we study the cascading failure mitigation methods in system where remote large-scale wind farm is integrated to bulk ac power through high-voltage direct current (HVDC) transmission based on voltage source converter (VSC) modular multilevel (MMC) topology. We first analyze over-voltage formation mechanism MMC-VSC-HVDC integration after short-circuit fault of an feed line, and find that saturation integers PI controller are main causes. Based analytical conclusions derived,...

The frequent oscillations in the weak-grid-tied permanent magnet synchronous generator (PMSG) wind farms can severely deteriorate power system security. impedance-based method is widely applied but limited to optimize system, where PMSG regarded as a black box and only external output characteristics are reflected. In this article, novel analytical approach proposed analyze from control interaction perspective, complement existing studies. shaping effect of interactions among various...

Cascading failure inevitably emerges in complex power grids that can cause enormous economic losses. Over the past few decades, a great deal of effort has been devoted to cascade modeling, with aim understanding and preventing this process. Significant achievements include reproducing uneven propagation profiles power-law distribution size cascades. At same time, keep evolving, as driven by technology advancements practical needs. Wide deployment information technologies high penetration...

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...

Abstract Distributed photovoltaic (PV) power plants often lack solar irradiance monitoring devices, significantly hindering crucial functions such as forecasting, fault diagnosis, and performance calculation for distributed PV. To address this issue, a real‐time method soft sensing was proposed in First, we investigated the typical relationship between irradiance, ambient temperature, electrical characteristics of PV cells. Based on relationship, utilized small sample modeling technique...

Power grids are vulnerable to extreme events that may cause the failure of multiple components and lead severe power outages. It is practical importance design effective restoration strategies enhance grid resilience. In this brief, we consider different time scales various methods propose an integrated strategy maximize total amount electricity supplied loads in recovery process. The properly combines slow method component repair fast optimal dispatch. Q-learning algorithm used generate...