Topic
Super grid
About: Super grid is a research topic. Over the lifetime, 96 publications have been published within this topic receiving 1021 citations. The topic is also known as: mega grid.
Papers published on a yearly basis
Papers
1 Oct 2013
TL;DR: In this paper, the authors proposed a method to identify unidirectional flows with a preferred flow direction and applied it on a casestudy for the European super grid.
Abstract: The construction of the North Sea Super Grid is the major step towards meetingthe future demand for electric power transmission in northern Europe This gridwill likely also extend onshore towards the load centres, and eventually form theEuropean Super GridLarge-scale electric power generation at remote locations will lead tosignificant long distance power flows with a preferred flow direction A methodto identify these unidirectional flows has been developed and applied on a casestudy, indicating the importance to consider unidirectional flows when designinga super gridVoltage source converter based HVDC appears to be the best technicalsolution for the implementation of long distance transmission in such an offshoresuper grid AC technology appears to be the most convenient choice for offshorenodes, but DC might also gain importance in this field, if reliable and affordableDC protection systems become available A meshed DC grid offers significantadvantages towards a solution with many independent point-to-point HVDClinks, but also here protection is an unsolved issue that has to be overcome firstReliability assessment of HVDC-based super grids is still very difficult,because operational experience with new technologies like the modularmultilevel converter is limited This leads to a lack of data to calculate thefailure probabilitiesA test system with a DC grid and the connected AC grids has been developedto serve as a common reference for a variety of DC grid studiesUnlike classical AC grids, DC grids will be dominated by power electronicsand the system behaviour will be determined to a large extent by the controllersof those power electronic systems Large-scale implementation of powerelectronics with inappropriate control design has led to problems in AC systemsbefore Photovoltaic generation systems in Germany are a good example forthisA simplified AC frequency model has been developed to assess how powerelectronic systems influence the grid frequency This model has been used to simulate how photovoltaic generation systems in Germany can endanger systemstability A ‘grid-friendly’ charging controller for plug-in electric vehicles withbattery storage has been developed, and simulations have indicated that thiscontrol can contribute significantly to system stabilityEven though AC and DC grids have some significant differences, some ofthe general concepts and lessons regarding balancing are true for both, andtomorrow’s DC grids can learn from today’s AC challengesThe balance in a DC grid should be defined as a current balance rather thanan active power balance (as it is used in AC grids), and the voltage can serve asa balance indicator, similar to AC frequency in AC grids The control base forcontrolling the voltage should also be current instead of active power, leadingto linear system behaviour and a linear control taskHVDC converter control methods can be regarded as cases of droop controlwith one or more linear segments in the characteristic control curve Withinone linear segment of the control curve, a HVDC converter can be representedby the Thevenin or Norton equivalent circuitTo unify a variety of proposed control concepts, Undead-band droop controlhas been proposed as a general piece-wise linear voltage control, which includesall other proposed methods as special implementations of undead-band droopcontrol This concept could also be applied for other tasks than DC voltagecontrol like AC frequency control
258 citations
Abstract: In this study power generation and demand are matched through a least-cost mix of renewable energy (RE) resources and storage technologies for North America by 2030. The study is performed using an hourly resolved model based on a linear optimization algorithm. The geographical, technical and economic potentials of different forms of RE resources enable the option of building a super grid between different North American regions. North America (including the U.S., Canada and Mexico in this paper), is divided into 20 sub-regions based on their population, demand, area and electricity grid structure. Four scenarios have been evaluated: region-wide, country-wide, area-wide and an integrated scenario. The levelised cost of electricity is found to be quite attractive in such a system, with the range from 63 €/MWhel in a decentralized case and 42 €/MWhel in a more centralized and integrated scenario. Electrical grid interconnections significantly reduce the storage requirement and overall cost of the energy system. Among all RE resources, wind and solar PV are found to be the least-cost options and hence the main contributors to fossil fuel substitution. The results clearly show that a 100% RE-based system is feasible and a real policy option at a modest cost. However, such a tremendous transition will not be possible in a short time if policy-makers, energy investors and other relevant organizations do not support the proposed system.
91 citations
24 Jul 2011
TL;DR: In this paper, the fundamental system planning, modeling and operational challenges of connecting large wind farms (both onshore and offshore) via long transmission systems, as well as the practical applications of traditional and new power electronic technologies, are presented.
Abstract: Innovative solutions with HVDC (High Voltage Direct Current) and FACTS (Flexible AC Transmission Systems) have the potential to cope with the system planning and operational challenges of global climate developments and the call for changes in the way electricity is supplied. New power electronic technologies with self-commutated converters make advanced technical features possible, such as independent control of active and reactive power, and the capability to supply weak or passive networks. As part of the overall planning considerations, this paper presents the fundamental system planning, modeling and operational challenges of connecting large wind farms (both onshore and offshore) via long transmission systems, as well as the practical applications of traditional and new power electronic technologies.
82 citations
1 Jan 2010
TL;DR: In this article, an overview over possible technologies is given and it is discussed how these can be utilised to realize the North Sea super grid (NSSG) in the UK.
Abstract: The North Sea Super Grid (NSSG) will include several independently planned projects, comprising a variety of different AC and DC technologies The offshore clusters will most likely be AC based Long distance transmission will be HVDC and nowadays Voltage Source Converter (VSC) technology is applied for offshore projects However in the future, Line Commutated Converter (LCC) technology could become an interesting option Hybrid HVDC systems that combine VSC and LCC technology, Multiterminal HVDC systems (MTDC) and parallel HVDC links will gain importance for the development of the NSSG In this paper an overview over possible technologies is given and it is discussed how these can be utilised to realise the North Sea Super Grid (5 pages)
79 citations
TL;DR: In this paper, the authors argue that it is far more sensible to interconnect regional electricity networks to form a globespanning supergrid than to unplug from the power grid.
Abstract: Reports abound of homeowners and businesses unplugging from the power grid and opting instead to generate and store their own electricity. Such grid defections may make sense in places where electricity rates are sky-high or service is spotty. But for just about everywhere else, it's far more sensible to do the very opposite: interconnect regional electricity networks to form a globespanning supergrid.
60 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 4 |
| 2020 | 10 |
| 2019 | 3 |
| 2018 | 6 |
| 2017 | 4 |
| 2016 | 8 |