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Direitos Sociais na Constituição Uma Análise da Constitucionalização dos Direitos Sociais em Portugal, 1975-76
Embora todas as constituições incluam direitos, e muitas delas incluam direitos sociais, a verdade é que algumas são mais generosas do que outras a este respeito. Mas nenhuma se aproxima da Constituição da República Portuguesa...
A Hybrid Binary Bird Swarm Optimization (BSO) and Dragonfly Algorithm (DA) for VM Allocation and Load Balancing in Cloud
The cloud platform is becoming one of the fastest-rising environments in human activities, connecting the whole world in the upcoming decades. The three crucial aspects of cloud computing that enhance the quality of service are...
Giovanni Canestrini’s models of Leonardo da Vinci’s friction experiments
IM Hutchings
Feb 16, 2017
Among the exhibits at the 2016 Leonardo da Vinci exhibition at the Science Museum, London, was one that purported to illustrate Leonardo’s experiments on friction. The models involved were the work of Giovanni Canestrini...
Power-to-gas management using robust optimisation in integrated energy systems

A large volume of wind power is curtailed worldwide due to the intermittency and limited transportation capacity of electrical power systems. New technologies, Power-to-Gas via electrolysis, can convert excessive wind power...

Small signal stability analysis for different types of PMSGs connected to the grid

Small signal stability of permanent magnet synchronous generator (PMSG)-based wind turbines connected to the power grid should be studied properly in order to facilitate damping strategy design. In this paper, unified...

Time-domain modeling of grid-connected CHP for its interaction with the power grid

This paper presents a nonlinear dynamic model of grid-connected combined heat and power (CHP) system that can effectively simulate the thermoelectric interactions and examine the impact of the CHP on the power grid. Based on...

Program for the Stage Production of Two One-Act Plays: She Was Only a Farmer's Daughter & Aria Da Capo
Curtain Club
Jan 01, 0001
This two-page program details the Curtain Club of Ursinus College's production of two one-act plays, "She Was Only a Farmer's Daughter" and "Aria Da Capo", held March 19, 1966. It includes information about the casting and...
Published by: Ursinus College
The Steady-state Analysis of DC Distribution Network Embedded Droop Control and Power Flow Controller

Aiming at the DC distribution network based on the droop control, this paper proposes that the intersection of the internal characteristics of the node converter droop control and the external characteristics derived from the...

A damping method for torsional vibrations in a DFIG wind turbine system based on small-signal analysis

Torsional vibrations present in the drivetrain excited by turbulent winds or grid disturbances (often manifesting as voltage sags) can produce severe stresses on the components of wind turbines. This study presents a damping...

Scheme design considering network topology and multi-attribute decision-making for under frequency load shedding

Power system emergency control is one key defense strategy in contingencies for protecting the system from cascading blackout. Under Frequency Load Shedding (UFLS) is one such strategy to ensure system stability by shedding...

Planning of Regional Urban Bus Charging Facility

The electrification of public transport is of great significance to alleviating environmental pollution and energy problems. The construction of charging stations for electric buses (EBs) is the key step for the...

Monitoring ash dieback (Hymenoscyphus fraxineus) in British forests using hyperspectral remote sensing
Abstract: Large‐scale dieback of ash trees (Fraxinus spp.) caused by the fungus Hymenoscyphus fraxineus is posing an immense threat to forest health in Europe, requiring effective monitoring at large scales. In this study, a...
Small signal stability analysis for different types of PMSGs connected to the grid

Small signal stability of permanent magnet synchronous generator (PMSG)-based wind turbines connected to the power grid should be studied properly in order to facilitate damping strategy design. In this paper, unified...

Time-domain modeling of grid-connected CHP for its interaction with the power grid

This paper presents a nonlinear dynamic model of grid-connected combined heat and power (CHP) system that can effectively simulate the thermoelectric interactions and examine the impact of the CHP on the power grid. Based on...

Power-to-gas management using robust optimisation in integrated energy systems

A large volume of wind power is curtailed worldwide due to the intermittency and limited transportation capacity of electrical power systems. New technologies, Power-to-Gas via electrolysis, can convert excessive wind power...

Planning of Regional Urban Bus Charging Facility

The electrification of public transport is of great significance to alleviating environmental pollution and energy problems. The construction of charging stations for electric buses (EBs) is the key step for the...

Scheme design considering network topology and multi-attribute decision-making for under frequency load shedding

Power system emergency control is one key defense strategy in contingencies for protecting the system from cascading blackout. Under Frequency Load Shedding (UFLS) is one such strategy to ensure system stability by shedding...

PI parameter tuning of converters for sub-synchronous interactions existing in grid-connected DFIG wind turbines

As a clean energy, wind power has been extensively exploited in the past few years. However, oscillations in wind turbines, particularly those from controllers, could severely affect the stability of power systems. Therefore...

Defining SSO Power and Characterizing SSO Propagation in Power System with Wind Farms Integration
This paper studies the characteristics of subsynchronous oscillation (SSO) power propagation in power systems with a large-scale wind farm integration. Based on the instantaneous power theory, a novel definition of SSO power is...
PI parameter tuning of converters for sub-synchronous interactions existing in grid-connected DFIG wind turbines

As a clean energy, wind power has been extensively exploited in the past few years. However, oscillations in wind turbines, particularly those from controllers, could severely affect the stability of power systems. Therefore...

Optimal operation of combined heat and power system based on forecasted energy prices in real-time markets

This paper develops a discrete operation optimization model for combined heat and powers (CHPs) in deregulated energy markets to maximize owners' profits, where energy price forecasting is included. First, a single input and...

The Steady-state Analysis of DC Distribution Network Embedded Droop Control and Power Flow Controller

Aiming at the DC distribution network based on the droop control, this paper proposes that the intersection of the internal characteristics of the node converter droop control and the external characteristics derived from the...

A damping method for torsional vibrations in a DFIG wind turbine system based on small-signal analysis

Torsional vibrations present in the drivetrain excited by turbulent winds or grid disturbances (often manifesting as voltage sags) can produce severe stresses on the components of wind turbines. This study presents a damping...

Location of low-frequency oscillation sources using improved D-S evidence theory

This paper presents a method for localizing oscillation sources based on data fusion Dempster–Shafer (D-S) evidence theory. This study is based on data of each bus from the system collected by phasor measurement units (PMUs)....

A Cyber-Secured Operation for Water-Energy Nexus
The wide implementation of information and communication technologies (ICT) cause power system operations exposed to cyber-attacks. Meanwhile, the tendency of integrated multi energy vectors has worsened this issue with multiple...

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