Reduced model and control of diode-interfaced offshore wind farms with DC power systems

2013 ◽  
Author(s):  
Shadi Chuangpishit ◽  
Ahmadreza Tabesh
Keyword(s):  
Power Systems ◽  
Wind Farms ◽  
Offshore Wind ◽  
Reduced Model ◽  
Offshore Wind Farms ◽  
Dc Power ◽  
And Control ◽  
Dc Power Systems

Topology Design for Collector Systems of Offshore Wind Farms With Pure DC Power Systems

2014 ◽  
Vol 61 (1) ◽  
pp. 320-328 ◽  
Author(s):  
Shadi Chuangpishit ◽  
Ahmadreza Tabesh ◽  
Zahra Moradi-Sharbabk ◽  
Maryam Saeedifard
Keyword(s):  
Power Systems ◽  
Wind Farms ◽  
Topology Design ◽  
Offshore Wind ◽  
Offshore Wind Farms ◽  
Dc Power ◽  
Dc Power Systems

scholarly journals Impact of Primary Frequency Control of Offshore HVDC Grids on Interarea Modes of Power Systems

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3879 ◽  
Author(s):  
Ali Bidadfar ◽  
Oscar Saborío-Romano ◽  
Vladislav Akhmatov ◽  
Nicolaos A. Cutululis ◽  
Poul E. Sørensen
Keyword(s):  
Power Systems ◽  
Frequency Control ◽  
Wind Farms ◽  
Offshore Wind ◽  
Offshore Wind Farms ◽  
Dc Voltage ◽  
Simultaneous Use ◽  
Primary Frequency ◽  
Primary Frequency Control ◽  
The Impact

Offshore high-voltage DC (HVDC) grids are developing as a technically reliable and economical solution to transfer more offshore wind power to onshore power systems. It is also foreseen that the offshore HVDC grids pave the way for offshore wind participation in power systems’ balancing process through frequency support. The primary frequency control mechanism in an HVDC grid can be either centralized using communication links between HVDC terminals or decentralized by the simultaneous use of DC voltage and frequency droop controls. This paper investigates the impact of both types of primary frequency control of offshore HVDC grids on onshore power system dynamics. Parametric presentation of power systems’ electro-mechanical dynamics and HVDC controls is developed to analytically prove that the primary frequency control can improve the damping of interarea modes of onshore power systems. The key findings of the paper include showing that the simultaneous use of frequency and DC voltage droop controls on onshore converters results in an autonomous share of damping torque between onshore power systems even without any participation of offshore wind farms in the frequency control. It is also found that the resulting damping from the frequency control of offshore HVDC is not always reliable as it can be nullified by the power limits of HVDC converters or wind farms. Therefore, using power oscillation damping control in parallel with frequency control is suggested. The analytical findings are verified by simulations on a three-terminal offshore HVDC grid.

scholarly journals Evolution of the HVDC Link Connecting Offshore Wind Farms to Onshore Power Systems

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1914 ◽  
Author(s):  
Roland Ryndzionek ◽  
Łukasz Sienkiewicz
Keyword(s):  
Power Systems ◽  
Power Plants ◽  
Wind Farms ◽  
Green Energy ◽  
Offshore Wind ◽  
Offshore Wind Farms ◽  
Promising Alternative ◽  
Offshore Wind Power ◽  
Transmission Distance ◽  
Wind Power Plants

This paper presents an overview of the DC link development and evolution dedicated to HVDC structure for connecting offshore wind power plants to onshore power systems. The growing demand for the green energy has forced investors in power industry to look for resources further out at sea. Hence, the development of power electronics and industrial engineering has enabled offshore wind farms to be situated further from the shore and in deeper waters. However, their development will require, among other technologies, DC-DC conversion systems. The advantages of HVDC over HVAC technology in relation to transmission distance are given. The different HVDC configurations and topologies of HVDC converters are elucidated. In this context, the HVDC grids are a promising alternative for the expansion of the existing AC grid.

The Hydrogen Economy and Carbon Abatement – Implications and Challenges for Wind Energy

2003 ◽  
Vol 27 (4) ◽  
pp. 239-256 ◽  
Author(s):  
A G Dutton
Keyword(s):  
Power Systems ◽  
Fossil Fuels ◽  
Fossil Fuel ◽  
Wind Farms ◽  
Water Electrolysis ◽  
Offshore Wind ◽  
Carbon Abatement ◽  
Offshore Wind Farms ◽  
Conventional Alternative ◽  
Economic Criteria

Hydrogen is a leading contender to become an alternative to fossil fuel for transport and for heat and power systems. The potential for the integration of water electrolysis systems in land based and offshore wind farms is explored and compared with the conventional alternative – steam reforming of methane. Depending on the specific production technology, hydrogen can displace fossil fuels and so reduce or completely remove the emission of carbon dioxide and other pollutants. This paper examines the principal technologies for producing hydrogen and shows how the eventual choice is likely to depend as much on political and legislative factors as on economic criteria.

scholarly journals Distance-Based Sampling Methods for Assessing the Ecological Effects of Offshore Wind Farms: Synthesis and Application to Fisheries Resource Studies

2021 ◽  
Vol 8 ◽  
Author(s):  
Elizabeth T. Methratta
Keyword(s):  
Sampling Methods ◽  
Marine Ecosystem ◽  
Wind Farms ◽  
Ecological Impacts ◽  
Offshore Wind ◽  
Offshore Wind Farms ◽  
Fisheries Resources ◽  
Temporal Variance ◽  
Powerful Approach ◽  
And Control

Renewable energy, sustainable seafood, and a healthy marine ecosystem are integral elements of a sustainable blue economy. The rapid global advancement of offshore wind coupled with its potential to affect marine life compels an urgent need for robust methodologies to assess the impacts of this industry on fisheries resource species. Basic Before-After-Control-Impact (BACI) and Control-Impact (CI) designs are the most common experimental designs used to study the effects of offshore wind development on fisheries resources. These designs do not account for spatial heterogeneity which presents a challenge because empirical evidence shows that impact gradients occur at wind farms, with larger effect sizes close to turbine foundations that attenuate with increasing distance. Combining the before-after sampling design with distance-based methods could provide a powerful approach for characterizing both the spatial and temporal variance associated with wind development. Toward enhancing future monitoring designs for fisheries resource species at offshore wind farms, this paper aims to: (1) examine distance-based sampling methods that have been or could potentially be used to study impacts on fisheries resources at offshore wind farms including distance-stratified BACI, distance-stratified CI, Before-After-Gradient (BAG), and After-Gradient (AG) methods; (2) synthesize the methods and findings of studies conducted to date that have used distance-based methods to examine ecological impacts of offshore wind development for benthic macroinvertebrates, finfish, birds, and small mammals; (3) examine some of the central methodological elements and issues to consider in developing distance-based impact studies; and (4) offer recommendations for how to incorporate distance-based sampling methods into monitoring plans at offshore wind farms.

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