power grid Articles
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Context–independent centrality measures underestimate the vulnerability of power grids
Power grids vulnerability is a key issue in society. A component failure may trigger cascades of failures across the grid and lead to a large blackout. Within complex network analysis, structural vulnerabilities of power grids have been studied mostly using purely topological approaches, which assumes that flow of power is dictated by shortest paths. However, this fails to capture the real flow ...
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Spectral analysis of a real power network
We present a spectral analysis of a significant part of the Italian bulk power system. Spectral analysis applied to graphs is not a new tool, but analyses of the real world, especially of technological networks, currently are lacking. We show the spectral pattern of a high voltage power network, calculate the ratio between the smallest and largest non–zero Laplacian eigenvalue to check its ...
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Repair strategies for minimising the risk of cascading failures in electricity networks
In this work, we develop repair strategies for simplified models of electric power grids. The goal is to gain insight into the combinatorial properties of repair problems in order to improve maintenance and restoration planning. Firstly, we consider a seriously damaged grid and try to find the set of lines that should be repaired first in order to resupply the customers as fast as possible. We ...
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Camp Pendleton - SOLAR Mailbox LIGHTING - Case study
About The Project Camp Pendleton and its residents were proud of brand-new on-base housing, but there were problems with the lighting, particularly with the mailboxes which were installed in banks under roofs. Residents weren’t able to see their mailboxes well after dark. Project management discovered Greenshine and avoided digging a trench to connect lighting to the main ...
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A perspective overview of topological approaches for vulnerability analysis of power transmission grids
Vulnerability analysis is a key issue in power systems since power transmission grids play a crucial role as a critical infrastructure. The power grid structure (number of nodes and lines, their connections, and their physical properties and operational constraints) is one of the main factors to assure power system security. Complex network theory as a promising topological approach for the ...
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Agents controlling the electric power infrastructure
The electric power grid is evolving from a centrally controlled grid with only a handful of regulated monopolies to an open, liberalised electricity market. In addition, more and more small-scale dispersed generators are deployed in distribution nets. This puts extra stress on the power grid, in an era when electricity is one of the most important commodities for economic, industrial and everyday ...
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Cascade failures and distributed generation in power grids
Power grids are nowadays experiencing a transformation due to the introduction of distributed generation based on renewable sources. At difference with classical distributed generation, where local power sources mitigate anomalous user consumption peaks, renewable sources introduce in the grid intrinsically erratic power inputs. By introducing a simple schematic (but realistic) model for power ...
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New Strategies for Power Grid Integration for Electric Vehicles
A interdisciplinary method to supporting future power systems in attaining low-carbon emission targets has been proposed by a collaborative research team led by the Chinese Academy of Sciences' Shanghai Advanced Research Institute and Nanjing University of Posts and Telecommunications. The findings were published in Renewable and Sustainable Energy Reviews on May 19th, 2023. The researchers ...
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Correlating empirical data and extended topological measures in power grid networks
Power grids are considered complex networks. Their structure and dynamics have been thoroughly studied and many topological measures have been used to classify them, evaluate their behaviour or model their response to malfunctions. Results have been theoretical and correlations between real dynamical behaviour (i.e., major events) and structural measures have not yet been found. New electrically ...
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Knowing power grids and understanding complexity science
Complex networks theory has been well established as a useful framework for studying and analysing structure, dynamics and evolution of many complex systems. Infrastructural and man–made systems like power grids, gas and water networks and the internet, have been also included in this network framework, albeit sometimes ignoring the huge historical body of knowledge surrounding them. Although ...
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Incident in the Forsmark 1 nuclear power plant in 2006: analysis of communication issues between the plant and the operating company of the power grid
Previous studies of the Forsmark incident from 25 July 2006 emphasised a need to improve integration and communication between the nuclear plants and the operating company of the power grid. This paper aims to better understand why communication issues occurred and what improvements are needed. For these purposes, communication issues were analysed in the context of knowledge management, more ...
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Modelling and control of a variable speed wind turbine driving doubly fed induction generator using three–level PWM converter
The aim of this researcher is to develop a complete wind central model driven doubly fed induction generator (DFIG) which feeds an AC power grid. For that, two–pulse width modulated (PWM) voltage converters are connected back to back between the rotor terminals of DFIG and the utility grid via a common DC link, in there, our contribution will appear in the utilisation of three levels voltage ...
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What is a distribution transformer?
Distribution Transformer: An Essential Component of Power Distribution Systems As you go about your daily life, you probably take for granted that electricity is readily available to power your home and business. However, there is a complex system in place that allows for the efficient distribution of electrical power, and one key component of this system is the distribution transformer. What ...
By Protrafo
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Security, trust, and QoS in next-generation control and communication for large power systems
The present communication architecture supporting control of the electric power grid makes it difficult to use the wealth of data collected at high rates in substations, retarding their use in new applications for controlling the grid. A flexible, real-time data network would make it possible to use these data for many more control and protection applications, potentially increasing the grid's ...
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Potential benefits of and barriers to inter-country power grid connections in Northeast Asia
The current state and prospects of the power industry in Northeast Asia (NEA) are outlined. The potential benefits from power system interconnection in the region, in particular capacity saving, decreasing electricity production costs and tariffs, reliability improvement and environmental effect are considered. Specific estimates of the benefits for the region are given. Barriers to power system ...
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3 Advantages of Solar Power vs Grid Power: An In-Depth Look
It’s said that Superman gets his powers from absorbing the energy of the sun. We like to bring that commonality up when discussing differences between solar power versus grid power. Using the world’s largest and virtually unending power source to fuel the world’s lighting is something Greenshine specializes in--apart from sharing similar traits with one of the greatest ...
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The evolution of the topology of high-voltage electricity networks
The electricity network represents an example of an evolving complex system. The first local networks contained only a few nodes, but within several decades, they have evolved into a highly connected continental system. The growth of these networks was influenced by various factors such as economic, demographic, political and technological developments. In this paper, we analyse the growth of the ...
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Reciprocally altruistic agents for the mitigation of cascading failures in power grids
Cascading failures in electrical power networks often come with disastrous consequences. A variety of schemes for mitigating cascading failures exist, but the vast majority depend upon centralised control architectures. Centralised designs are frequently more susceptible to communications latency and bandwidth limitations and can be vulnerable to random failures and directed attacks. This paper ...
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Avoiding the Power Grid with Renewable Energy
For approximately one hundred years, thriving countries have been dependent on only one form of distributing power; electricity sent over large transmission grids from plants generating electricity, to customers in businesses, homes, and factories. Generators extract energy from rooftop solar panels, garbage, and sewage, which replace or assist coal, nuclear, and natural gas plants. A diverse ...
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Project with Siemens Gamesa - Case Study
Project with Siemens Gamesa Renewable Energy. HyProvide™ A90 electrolyzer for on-site hydrogen generation. Complete turnkey delivery and commissioning by GHS. Key Facts A-Series A60 Product 130 Production (kg H2/day) 28 Outlet pressure (bar) Denmark Project location A pioneering wind-to-hydrogen project As part of a pioneering wind-to-hydrogen project, Green Hydrogen Systems’ ...
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